U.S. patent application number 16/257718 was filed with the patent office on 2019-07-11 for method for recognizing thief zone in oil pool, computer apparatus and computer readable storage medium.
The applicant listed for this patent is PetroChina Company Limited. Invention is credited to Baozhu LI, Yong LI, Benbiao SONG, Qi WANG, Chenji WEI, Lihui XIONG, Jing ZHANG, Qi ZHANG, Weimin ZHANG, Jie ZHENG.
Application Number | 20190211674 16/257718 |
Document ID | / |
Family ID | 57289620 |
Filed Date | 2019-07-11 |
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United States Patent
Application |
20190211674 |
Kind Code |
A1 |
WEI; Chenji ; et
al. |
July 11, 2019 |
METHOD FOR RECOGNIZING THIEF ZONE IN OIL POOL, COMPUTER APPARATUS
AND COMPUTER READABLE STORAGE MEDIUM
Abstract
A method for recognizing a thief zone in an oil pool, a computer
apparatus and a computer readable storage medium, wherein, the
method comprises: calculating a yield contribution value per unit
thickness for single-reservoir stratum and a relative contribution
coefficient of individual reservoir stratum in oil pool production
logging, the relative contribution coefficient being a ratio of the
yield contribution value per unit thickness for single-reservoir
stratum to a yield per unit thickness for the whole reservoir
stratum interval; determining a smallest yield contribution value
per unit thickness for single-reservoir stratum and a smallest
relative contribution coefficient from the yield contribution
values per unit thickness for single-reservoir stratum and the
relative contribution coefficients in the oil pool production
logging, according to the characteristics of different oil pools;
calculating the yield contribution value per unit thickness for
single-reservoir stratum and the relative contribution coefficient
of each reservoir stratum of each well in the oil pool
to-be-measured; determining whether or not a thief zone is
developed for each reservoir stratum of each well according to a
magnitude relationship between the yield contribution value per
unit thickness for single-reservoir stratum of each reservoir
stratum of each well and the smallest yield contribution value per
unit thickness for single-reservoir stratum and according to the
magnitude relationship between the relative contribution
coefficient of each reservoir stratum of each well and the smallest
relative contribution coefficient.
Inventors: |
WEI; Chenji; (Beijing,
CN) ; LI; Yong; (Beijing, CN) ; LI;
Baozhu; (Beijing, CN) ; SONG; Benbiao;
(Beijing, CN) ; ZHANG; Qi; (Beijing, CN) ;
XIONG; Lihui; (Beijing, CN) ; ZHENG; Jie;
(Beijing, CN) ; ZHANG; Weimin; (Beijing, CN)
; ZHANG; Jing; (Beijing, CN) ; WANG; Qi;
(Beijing, CN) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
PetroChina Company Limited |
Beijing |
|
CN |
|
|
Family ID: |
57289620 |
Appl. No.: |
16/257718 |
Filed: |
January 25, 2019 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
|
|
PCT/CN2017/072146 |
Jan 23, 2017 |
|
|
|
16257718 |
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Current U.S.
Class: |
1/1 |
Current CPC
Class: |
E21B 49/00 20130101;
E21B 41/00 20130101; E21B 43/14 20130101 |
International
Class: |
E21B 49/00 20060101
E21B049/00 |
Foreign Application Data
Date |
Code |
Application Number |
Jul 26, 2016 |
CN |
201610595109.3 |
Claims
1. A method for recognizing a thief zone in an oil pool,
comprising: calculating a yield contribution value per unit
thickness for single-reservoir stratum and a relative contribution
coefficient of individual reservoir stratum in oil pool production
logging, wherein, the yield contribution value per unit thickness
for single-reservoir stratum is a ratio of a single-reservoir
stratum yield to a single-reservoir stratum thickness, and the
relative contribution coefficient is a ratio of the yield
contribution value per unit thickness for single-reservoir stratum
to a yield per unit thickness for the whole reservoir stratum
interval; determining a smallest yield contribution value per unit
thickness for single-reservoir stratum and a smallest relative
contribution coefficient from the yield contribution values per
unit thickness for single-reservoir stratum and the relative
contribution coefficients in the oil pool production logging,
according to the characteristics of different oil pools, wherein,
the smallest yield contribution value per unit thickness for
single-reservoir stratum and the smallest relative contribution
coefficient meet the requirements of thief zone recognition for
different oil pools; calculating the yield contribution value per
unit thickness for single-reservoir stratum and the relative
contribution coefficient of each reservoir stratum of each well in
the oil pool to-be-measured; and determining whether or not a thief
zone is developed for each reservoir stratum of each well,
according to a magnitude relationship between the yield
contribution value per unit thickness for single-reservoir stratum
of each reservoir stratum of each well and the smallest yield
contribution value per unit thickness for single-reservoir stratum
and according to a magnitude relationship between the relative
contribution coefficient of each reservoir stratum of each well and
the smallest relative contribution coefficient.
2. The method for recognizing a thief zone in an oil pool according
to claim 1, wherein determining whether or not a thief zone is
developed for each reservoir stratum of each well according to a
magnitude relationship between the yield contribution value per
unit thickness for single-reservoir stratum of each reservoir
stratum of each well and the smallest yield contribution value per
unit thickness for single-reservoir stratum and according to a
magnitude relationship between the relative contribution
coefficient of each reservoir stratum of each well and the smallest
relative contribution coefficient comprises: drawing a graph by
taking the yield contribution value per unit thickness for
single-reservoir stratum of individual reservoir stratum in the oil
pool production logging as an ordinate and the relative
contribution coefficient of individual reservoir stratum in the oil
pool production logging as an abscissa, wherein, an intersection
line of the smallest yield contribution value per unit thickness
for single-reservoir stratum and the smallest relative contribution
coefficient divides the graph into different areas; and determining
whether or not a thief zone is developed for each reservoir stratum
of each well, according to distribution positions of the yield
contribution value per unit thickness for single-reservoir stratum
of each reservoir stratum of each well and the relative
contribution coefficient of each reservoir stratum of each well in
the different areas of the graph.
3. The method for recognizing a thief zone in an oil pool according
to claim 1, wherein determining whether or not a thief zone is
developed for each reservoir stratum of each well according to a
magnitude relationship between the yield contribution value per
unit thickness for single-reservoir stratum of each reservoir
stratum of each well and the smallest yield contribution value per
unit thickness for single-reservoir stratum and according to a
magnitude relationship between the relative contribution
coefficient of each reservoir stratum of each well and the smallest
relative contribution coefficient comprises: not judging the
reservoir stratum of which the yield contribution value per unit
thickness for single-reservoir stratum is smaller than the smallest
yield contribution value per unit thickness for single-reservoir
stratum; determining the reservoir stratum of which the yield
contribution value per unit thickness for single-reservoir stratum
is greater than the smallest yield contribution value per unit
thickness for single-reservoir stratum and the relative
contribution coefficient is smaller than the smallest relative
contribution coefficient to be a non-thief zone; and determining
the reservoir stratum of which the yield contribution value per
unit thickness for single-reservoir stratum is greater than the
smallest yield contribution value per unit thickness for
single-reservoir stratum and the relative contribution coefficient
is greater than the smallest relative contribution coefficient to
be a thief zone.
4. The method for recognizing a thief zone in an oil pool according
to claim 1, wherein for a carbonatite oil pool, the smallest yield
contribution value per unit thickness for single-reservoir stratum
is 50, and the smallest relative contribution coefficient is 2.
5. A computer apparatus comprising a processor and a memory
comprising computer readable instructions, the processor being
enabled to execute the following operations when the computer
readable instructions are executed: calculating a yield
contribution value per unit thickness for single-reservoir stratum
and a relative contribution coefficient of individual reservoir
stratum in oil pool production logging, wherein, the yield
contribution value per unit thickness for single-reservoir stratum
is a ratio of a single-reservoir stratum yield to a
single-reservoir stratum thickness, and the relative contribution
coefficient is a ratio of the yield contribution value per unit
thickness for single-reservoir stratum to a yield per unit
thickness for the whole reservoir stratum interval; determining a
smallest yield contribution value per unit thickness for
single-reservoir stratum and a smallest relative contribution
coefficient, from the yield contribution values per unit thickness
for single-reservoir stratum and the relative contribution
coefficients in the oil pool production logging, according to the
characteristics of different oil pools, wherein, the smallest yield
contribution value per unit thickness for single-reservoir stratum
and the smallest relative contribution coefficient meet the
requirements of thief zone recognition for different oil pools;
calculating the yield contribution value per unit thickness for
single-reservoir stratum and the relative contribution coefficient
of each reservoir stratum of each well in the oil pool
to-be-measured; and determining whether or not a thief zone is
developed for each reservoir stratum of each well, according to a
magnitude relationship between the yield contribution value per
unit thickness for single-reservoir stratum of each reservoir
stratum of each well and the smallest yield contribution value per
unit thickness for single-reservoir stratum and according to a
magnitude relationship between the relative contribution
coefficient of each reservoir stratum of each well and the smallest
relative contribution coefficient.
6. The computer apparatus according to claim 5, wherein the
computer readable instructions enable the processor to: draw a
graph by taking the yield contribution value per unit thickness for
single-reservoir stratum of individual reservoir stratum in the oil
pool production logging as an ordinate and the relative
contribution coefficient of individual reservoir stratum in the oil
pool production logging as an abscissa, wherein, an intersection
line of the smallest yield contribution value per unit thickness
for single-reservoir stratum and the smallest relative contribution
coefficient divides the graph into different areas; and determine
whether or not a thief zone is developed for each reservoir stratum
of each well, according to the distribution positions of the yield
contribution value per unit thickness for single-reservoir stratum
of each reservoir stratum of each well and the relative
contribution coefficient of each reservoir stratum of each well in
the different areas of the graph.
7. The computer apparatus according to claim 5, wherein the
computer readable instructions enable the processor: not to judge
the reservoir stratum of which the yield contribution value per
unit thickness for single-reservoir stratum is smaller than the
smallest yield contribution value per unit thickness for
single-reservoir stratum; to determine the reservoir stratum of
which the yield contribution value per unit thickness for
single-reservoir stratum is greater than the smallest yield
contribution value per unit thickness for single-reservoir stratum
and the relative contribution coefficient is smaller than the
smallest relative contribution coefficient to be a non-thief zone;
and to determine the reservoir stratum of which the yield
contribution value per unit thickness for single-reservoir stratum
is greater than the smallest yield contribution value per unit
thickness for single-reservoir stratum and the relative
contribution coefficient is greater than the smallest relative
contribution coefficient to be a thief zone.
8. A computer readable storage medium comprising computer readable
instructions, wherein the computer readable instructions enable a
processor to at least execute the following operations when the
computer readable instructions are executed: calculating a yield
contribution value per unit thickness for single-reservoir stratum
and a relative contribution coefficient of individual reservoir
stratum in oil pool production logging, wherein, the yield
contribution value per unit thickness for single-reservoir stratum
is a ratio of a single-reservoir stratum yield to a
single-reservoir stratum thickness, and relative contribution
coefficient is a ratio of the yield contribution value per unit
thickness for single-reservoir stratum to a yield per unit
thickness for the whole reservoir stratum interval; determining a
smallest yield contribution value per unit thickness for
single-reservoir stratum and a smallest relative contribution
coefficient, from the yield contribution values per unit thickness
for single-reservoir stratum and the relative contribution
coefficients in the oil pool production logging, according to the
characteristics of different oil pools, wherein, the smallest yield
contribution value per unit thickness for single-reservoir stratum
and the smallest relative contribution coefficient meet the
requirements of thief zone recognition for different oil pools;
calculating the yield contribution value per unit thickness for
single-reservoir stratum and the relative contribution coefficient
of each reservoir stratum of each well in the oil pool to be
measured; and determining whether or not a thief zone is developed
for each reservoir stratum of each well, according to a magnitude
relationship between the yield contribution value per unit
thickness for single-reservoir stratum of each reservoir stratum of
each well and the smallest yield contribution value per unit
thickness for single-reservoir stratum and according to a magnitude
relationship between the relative contribution coefficient of each
reservoir stratum of each well and the smallest relative
contribution coefficient.
9. The computer readable storage medium comprising computer
readable instructions according to claim 8, wherein the computer
readable instructions enable the processor to: draw a graph by
taking the yield contribution value per unit thickness for
single-reservoir stratum of individual reservoir stratum in the oil
pool production logging as an ordinate and the relative
contribution coefficient of individual reservoir stratum in the oil
pool production logging as an abscissa, wherein, an intersection
line of the smallest yield contribution value per unit thickness
for single-reservoir stratum and the smallest relative contribution
coefficient divides the graph into different areas; and determine
whether or not a thief zone is developed for each reservoir stratum
of each well, according to the distribution positions of the yield
contribution value per unit thickness for single-reservoir stratum
of each reservoir stratum of each well and the relative
contribution coefficient of each reservoir stratum of each well in
the different areas of the graph.
10. The computer readable storage medium comprising computer
readable instructions according to claim 8, wherein the computer
readable instructions enable the processor: not to judge the
reservoir stratum of which the yield contribution value per unit
thickness for single-reservoir stratum is smaller than the smallest
yield contribution value per unit thickness for single-reservoir
stratum; to determine the reservoir stratum of which the yield
contribution value per unit thickness for single-reservoir stratum
is greater than the smallest yield contribution value per unit
thickness for single-reservoir stratum and the relative
contribution coefficient is smaller than the smallest relative
contribution coefficient to be a non-thief zone; and to determine
the reservoir stratum of which the yield contribution value per
unit thickness for single-reservoir stratum is greater than the
smallest yield contribution value per unit thickness for
single-reservoir stratum and the relative contribution coefficient
is greater than the smallest relative contribution coefficient to
be a thief zone.
Description
TECHNICAL FIELD
[0001] The present invention relates to the technical field of
carbonatite oil pool exploitation, in particular to a method for
recognizing a thief zone in an oil pool, a computer apparatus, and
a computer readable storage medium.
BACKGROUND
[0002] A thief zone refers to a thin reservoir stratum which has a
permeability much higher than the average permeability of the
reservoir stratums, fluids mainly flow along the thief zone,
causing the water breakthrough to be too fast, which greatly
reduces the swept volume, results in invalid circulation of water
injection and affects the overall development effect of the oil
field. At present, the thief zone is generally recognized and
represented by means of geological static data, yield, liquid
production index, production increase contribution rate,
single-layer liquid production index, dimensionless pressure
coefficient, etc. However, these dynamic and static recognition
methods all have certain limitations. The thief zone cannot be
recognized quantitatively based on the geological static data; when
the thief zone is recognized based on yield data, the concept of
production pressure differential is not taken into consideration;
when the thief zone is divided according to the indexes such as the
liquid production index, the production increase contribution rate,
the single-layer liquid production index and the dimensionless
pressure coefficient, the limitation conditions such as reservoir
thickness or extremely poor permeability are not taken into
consideration. Up to now, there is still not a method that can
recognize the thief zone fast and accurately.
SUMMARY
[0003] The embodiments of the present invention provide a method
for recognizing a thief zone in an oil pool in order to solve the
technical problem that the thief zone recognition has a low
accuracy in the prior art. The method comprises: calculating a
yield contribution value per unit thickness for single-reservoir
stratum and a relative contribution coefficient of individual
reservoir stratum in oil pool production logging, wherein, the
yield contribution value per unit thickness for single-reservoir
stratum is a ratio of a single-reservoir stratum yield to a
single-reservoir stratum thickness, and the relative contribution
coefficient is a ratio of the yield contribution value per unit
thickness for single-reservoir stratum to a yield per unit
thickness for the whole reservoir stratum interval; determining a
smallest yield contribution value per unit thickness for
single-reservoir stratum and a smallest relative contribution
coefficient from the yield contribution values per unit thickness
for single-reservoir stratum and the relative contribution
coefficients in the oil pool production logging, according to the
characteristics of different oil pools, wherein, the smallest yield
contribution value per unit thickness for single-reservoir stratum
and the smallest relative contribution coefficient meet the
requirements of thief zone recognition for different oil pools;
calculating the yield contribution value per unit thickness for
single-reservoir stratum and the relative contribution coefficient
of each reservoir stratum of each well in the oil pool
to-be-measured; determining whether or not a thief zone is
developed for each reservoir stratum of each well according to a
magnitude relationship between the yield contribution value per
unit thickness for single-reservoir stratum of each reservoir
stratum of each well and the smallest yield contribution value per
unit thickness for single-reservoir stratum and according to a
magnitude relationship between the relative contribution
coefficient of each reservoir stratum of each well and the smallest
relative contribution coefficient.
[0004] The embodiments of the present invention also provide a
computer apparatus in order to solve the technical problem that the
thief zone recognition has a low accuracy in the prior art. The
computer apparatus comprises: a processor; and a memory comprising
computer readable instructions. The processor is enabled to execute
the following operations when the computer readable instructions
are executed: calculating a yield contribution value per unit
thickness for single-reservoir stratum and a relative contribution
coefficient of individual reservoir stratum in oil pool production
logging, wherein, the yield contribution value per unit thickness
for single-reservoir stratum is a ratio of a single-reservoir
stratum yield to a single-reservoir stratum thickness, and the
relative contribution coefficient is a ratio of the yield
contribution value per unit thickness for single-reservoir stratum
to a yield per unit thickness for the whole reservoir stratum
interval; determining a smallest yield contribution value per unit
thickness for single-reservoir stratum and a smallest relative
contribution coefficient from the yield contribution values per
unit thickness for single-reservoir stratum and the relative
contribution coefficients in the oil pool production logging,
according to the characteristics of different oil pools, wherein,
the smallest yield contribution value per unit thickness for
single-reservoir stratum and the smallest relative contribution
coefficient meet the requirements of thief zone recognition for
different oil pools; calculating the yield contribution value per
unit thickness for single-reservoir stratum and the relative
contribution coefficient of each reservoir stratum of each well in
the oil pool to-be-measured; determining whether or not a thief
zone is developed for each reservoir stratum of each well according
to a magnitude relationship between the yield contribution value
per unit thickness for single-reservoir stratum of each reservoir
stratum of each well and the smallest yield contribution value per
unit thickness for single-reservoir stratum and according to a
magnitude relationship between the relative contribution
coefficient of each reservoir stratum of each well and the smallest
relative contribution coefficient.
[0005] The embodiments of the present invention also provide a
computer readable storage medium comprising computer readable
instructions in order to solve the technical problem that the thief
zone recognition has a low accuracy in the prior art. The computer
readable instructions enable the processor to at least execute the
following operations when the computer readable instructions are
executed: calculating a yield contribution value per unit thickness
for single-reservoir stratum and a relative contribution
coefficient of individual reservoir stratum in oil pool production
logging, wherein, the yield contribution value per unit thickness
for single-reservoir stratum is a ratio of a single-reservoir
stratum yield to a single-reservoir stratum thickness, and the
relative contribution coefficient is a ratio of the yield
contribution value per unit thickness for single-reservoir stratum
to a yield per unit thickness for the whole reservoir stratum
interval; determining a smallest yield contribution value per unit
thickness for single-reservoir stratum and a smallest relative
contribution coefficient from the yield contribution values per
unit thickness for single-reservoir stratum and the relative
contribution coefficients in the oil pool production logging,
according to the characteristics of different oil pools, wherein,
the smallest yield contribution value per unit thickness for
single-reservoir stratum and the smallest relative contribution
coefficient meet the requirements of thief zone recognition for
different oil pools; calculating the yield contribution value per
unit thickness for single-reservoir stratum and the relative
contribution coefficient of each reservoir stratum of each well in
the oil pool to-be-measured; determining whether or not a thief
zone is developed for each reservoir stratum of each well according
to a magnitude relationship between the yield contribution value
per unit thickness for single-reservoir stratum of each reservoir
stratum of each well and the smallest yield contribution value per
unit thickness for single-reservoir stratum and according to a
magnitude relationship between the relative contribution
coefficient of each reservoir stratum of each well and the smallest
relative contribution coefficient.
[0006] In the embodiments of the present invention, the yield
contribution value per unit thickness for single-reservoir stratum
and the relative contribution coefficient of individual reservoir
stratum in the oil pool production logging are calculated (for
example, the yield contribution value per unit thickness for
single-reservoir stratum and the relative contribution coefficient
of individual reservoir stratum in the oil pool production logging
can be calculated based on dynamic monitoring data of the oil pool
production logging), the smallest yield contribution value per unit
thickness for single-reservoir stratum and the smallest relative
contribution coefficient are determined according to the
characteristics of different oil pools, and at last, whether or not
a thief zone is developed for each reservoir stratum of each well
can be determined fast according to a magnitude relationship
between the yield contribution value per unit thickness for
single-reservoir stratum of each reservoir stratum of each well and
the smallest yield contribution value per unit thickness for
single-reservoir stratum and according to a magnitude relationship
between the relative contribution coefficient of each reservoir
stratum of each well and the smallest relative contribution
coefficient. Since the calculation of the yield contribution value
per unit thickness for single-reservoir stratum and the relative
contribution coefficient has fully considered the influence of
thickness on yield contribution, the thief zone recognition is
allowed to be more in line with actual situations, thus helping
improving the accuracy of the thief zone recognition.
BRIEF DESCRIPTION OF THE DRAWINGS
[0007] To explain the technical solutions in the embodiments of the
present invention more clearly, the following will briefly
introduce the figures needed in the description of the embodiments.
Obviously, the figures in the following description are only some
embodiments of the present invention, and for ordinary skilled
persons in the art, other figures may also be obtained based on
these figures without paying any creative efforts. In the
figures:
[0008] FIG. 1 is a flow chart of a method for recognizing a thief
zone in an oil pool in the embodiments of the present
invention;
[0009] FIG. 2 is a discrimination graph of the thief zone
recognition in the embodiments of the present invention;
[0010] FIG. 3 is a schematic diagram of the thief zone recognition
in a carbonatite oil pool in the embodiments of the present
invention;
[0011] FIG. 4 is a block diagram of the structure of a computer
apparatus in the embodiments of the present invention.
DETAILED DESCRIPTION OF THE INVENTION
[0012] In order to make the object, the technical solutions and the
advantages of the present invention more clear, the following will
provide a further detailed description of the embodiments of the
present invention in combination with the figures. Here, the
exemplary embodiments of the present invention and the description
thereof are intended for explaining the present invention, not for
limiting the present invention.
[0013] FIG. 1 is a flow chart of a method for recognizing a thief
zone in an oil pool in the embodiments of the present invention. As
shown in FIG. 1, the method for recognizing a thief zone in an oil
pool in the embodiments of the present invention can comprise:
[0014] Step 101: calculating a yield contribution value per unit
thickness for single-reservoir stratum and a relative contribution
coefficient of individual reservoir stratum in oil pool production
logging, wherein, the yield contribution value per unit thickness
for single-reservoir stratum is a ratio of a single-reservoir
stratum yield to a single-reservoir stratum thickness, and the
relative contribution coefficient is a ratio of the yield
contribution value per unit thickness for single-reservoir stratum
to a yield per unit thickness for the whole reservoir stratum
interval;
[0015] Step 102: determining a smallest yield contribution value
per unit thickness for single-reservoir stratum and a smallest
relative contribution coefficient from the yield contribution
values per unit thickness for single-reservoir stratum and the
relative contribution coefficients in the oil pool production
logging, according to the characteristics of different oil pools,
wherein, the smallest yield contribution value per unit thickness
for single-reservoir stratum and the smallest relative contribution
coefficient meet the requirements of thief zone recognition for
different oil pools;
[0016] Step 103: calculating the yield contribution value per unit
thickness for single-reservoir stratum and the relative
contribution coefficient of each reservoir stratum of each well in
the oil pool to-be-measured;
[0017] Step 104: determining whether or not a thief zone is
developed for each reservoir stratum of each well, according to a
magnitude relationship between the yield contribution value per
unit thickness for single-reservoir stratum of each reservoir
stratum of each well and the smallest yield contribution value per
unit thickness for single-reservoir stratum and according to a
magnitude relationship between the relative contribution
coefficient of each reservoir stratum of each well and the smallest
relative contribution coefficient.
[0018] As can be seen from FIG. 1, in the embodiments of the
present invention, whether or not a thief zone is developed for
each reservoir stratum of each well can be determined fast by:
calculating the yield contribution value per unit thickness for
single-reservoir stratum and the relative contribution coefficient
of individual reservoir stratum in the oil pool production logging
(for example, the yield contribution value per unit thickness for
single-reservoir stratum and the relative contribution coefficient
of individual reservoir stratum in the oil pool production logging
can be calculated based on dynamic monitoring data of the oil pool
production logging), and determining the smallest yield
contribution value per unit thickness for single-reservoir stratum
and the smallest relative contribution coefficient according to the
characteristics of different oil pools, and at last, whether or not
a thief zone is developed for each reservoir stratum of each well
can be determined fast according to a magnitude relationship
between the yield contribution value per unit thickness for
single-reservoir stratum of each reservoir stratum of each well and
the smallest yield contribution value per unit thickness for
single-reservoir stratum and according to a magnitude relationship
between the relative contribution coefficient of each reservoir
stratum of each well and the smallest relative contribution
coefficient. Since the calculation of the yield contribution value
per unit thickness for single-reservoir stratum and the relative
contribution coefficient has fully considered the influence of
thickness on yield contribution, the thief zone recognition is
allowed to be more in line with actual situations, thus helping
improving the accuracy of the thief zone recognition.
[0019] In a concrete implementation, it is possible to obtain all
the single-well single-layer (i.e., single-reservoir stratum)
thicknesses and the corresponding single-layer yields based on
monitoring data on the production logging on site, and thereby
obtain a single-layer thickness percentage and a single-layer yield
percentage, and at last calculate the yield contribution value per
unit thickness for single-reservoir stratum and the relative
contribution coefficient (RCI) by using the single-well
single-layer yield, the single-layer thickness, the single-layer
thickness percentage and the single-layer yield percentage.
[0020] In a concrete implementation, it is assumed that the
reservoir stratum interval has n single layers, the yield of the
i.sup.th layer is Q.sub.i, the thickness of the i.sup.th layer is
h.sub.i, the total yield of the reservoir stratums is Q.sub.t, and
the total thickness of the reservoir stratums is h.sub.t. The
abscissa in the thief zone recognition graph (i.e., the yield
contribution value per unit thickness for single-reservoir stratum)
is a ratio of the single-layer yield to the single-layer thickness,
i.e., the yield contribution value per unit thickness for
single-reservoir stratum, this parameter can effectively solve the
problem that the thickness of the thief zone is not considered in
the previous methods for recognizing a thief zone.
[0021] In a concrete implementation, in order to recognize the
thief zone more quickly, in this embodiment, the step of
determining whether or not a thief zone is developed for each
reservoir stratum of each well according to a magnitude
relationship between the yield contribution value per unit
thickness for single-reservoir stratum of each reservoir stratum of
each well and the smallest yield contribution value per unit
thickness for single-reservoir stratum and according to a magnitude
relationship between the relative contribution coefficient of each
reservoir stratum of each well and the smallest relative
contribution coefficient comprises: drawing a graph by taking the
yield contribution value per unit thickness for single-reservoir
stratum of individual reservoir stratum in the oil pool production
logging as an ordinate and the relative contribution coefficient of
individual reservoir stratum in the oil pool production logging as
an abscissa, wherein, an intersection line of the smallest yield
contribution value per unit thickness for single-reservoir stratum
and the smallest relative contribution coefficient divides the
graph into different areas; and determining whether or not a thief
zone is developed for each reservoir stratum of each well according
to the distribution positions of the yield contribution value per
unit thickness for single-reservoir stratum of each reservoir
stratum of each well and the relative contribution coefficient of
each reservoir stratum of each well in different areas of the
graph.
[0022] To be specific, as shown in FIG. 2, after the graph has been
drawn with the yield contribution value per unit thickness for
single-reservoir stratum of individual reservoir stratum in the oil
pool production logging as the ordinate and the relative
contribution coefficient of individual reservoir stratum in the oil
pool production logging as the abscissa, the intersection line of
the smallest yield contribution value per unit thickness for
single-reservoir stratum and the smallest relative contribution
coefficient divides the graph into different areas, i.e., the
intersection line of the smallest yield contribution value per unit
thickness for single-reservoir stratum and the smallest relative
contribution coefficient divides the graph into different areas
according to the magnitude relationships of the coordinate values
with the smallest yield contribution value per unit thickness for
single-reservoir stratum and the smallest relative contribution
coefficient. The areas are, for example, a thief zone-developed
area, a thief zone-undeveloped area and an area that is not
considered due to excessively low yield per unit thickness. Whether
or not a thief zone is developed can be determined quickly
according to the distribution positions of the data of each
reservoir stratum of each well in the different areas.
[0023] In a concrete implementation, the step of determining
whether or not a thief zone is developed for each reservoir stratum
of each well according to a magnitude relationship between the
yield contribution value per unit thickness for single-reservoir
stratum of each reservoir stratum of each well and the smallest
yield contribution value per unit thickness for single-reservoir
stratum and according to a magnitude relationship between the
relative contribution coefficient of each reservoir stratum of each
well and the smallest relative contribution coefficient comprises:
not judging the reservoir stratum of which the yield contribution
value per unit thickness for single-reservoir stratum is smaller
than the smallest yield contribution value per unit thickness for
single-reservoir stratum; determining the reservoir stratum of
which the yield contribution value per unit thickness for
single-reservoir stratum is greater than the smallest yield
contribution value per unit thickness for single-reservoir stratum
and the relative contribution coefficient is smaller than the
smallest relative contribution coefficient to be a non-thief zone;
and determining the reservoir stratum of which the yield
contribution value per unit thickness for single-reservoir stratum
is greater than the smallest yield contribution value per unit
thickness for single-reservoir stratum and the relative
contribution coefficient is greater than the smallest relative
contribution coefficient to be a thief zone.
[0024] In a concrete implementation, the smallest yield
contribution value per unit thickness for single-reservoir stratum
and the smallest relative contribution coefficient can be
determined with respect to different oil pools. The single layer of
which the yield contribution value per unit thickness for
single-reservoir stratum is too low is not sufficient to influence
the water-flooding development of the oil pool, and does not have a
value for thief zone recognition. Thus, there is a need of
determining the smallest yield contribution value per unit
thickness for single-reservoir stratum. Due to the differences in
the factors such as the physical properties of the oil pool, the
smallest yield contribution values per unit thickness for
single-reservoir stratum of different oil pools should be
different, and generally can be a half of the average value of the
yield contribution values per unit thickness for single-reservoir
stratum. For example, for a carbonatite oil pool, the smallest
yield contribution value per unit thickness for single-reservoir
stratum can be 50 stb/ft. The higher the smallest relative
contribution coefficient is, the greater the productivity of the
single layer is. The contribution of the productivity of the thief
zone is greater than that of the overall productivity of the
reservoir stratums. In general, the relative contribution
coefficient for thief zone judging is defined to a value greater
than or equal to 2. For example, for a carbonatite oil pool, the
smallest relative contribution coefficient is 2.
[0025] The following will give a description of the above method
for recognizing a thief zone in an oil pool in combination with
concrete examples. The carbonatite oil pool is taken as an
example.
[0026] (1) Data Collection and Data Quality Control
[0027] The method is used to recognize the position of the thief
zone, the collected data is the production logging data of the
carbonatite oil pool, specifically including all the single-layer
thicknesses and the corresponding single-layer yields. The
recognition process can be initiated after all the data has been
collected and the quality control thereof has been conducted.
[0028] This embodiment is based on the result of preliminary
screening, the data of 110 single layers of 25 wells is obtained,
and the yield contribution values per unit thickness for
single-reservoir stratum and relative contribution coefficients
(RCI) are calculated using the single-layer yield, the single-layer
thickness, the single-layer thickness percentage and the
single-layer yield percentage. The result is shown in Table 1.
TABLE-US-00001 TABLE 1 Data of a group of candidate wells for
carbonatite thief zone recognition Single-layer Single-layer
Single-layer yield contribution relative Well Single-layer
thickness Single-layer yield value per unit contribution number
thickness (m) percentage (%) yield (stb) percentage (%) thickness
(stb/m) coefficient W1 4.00 15.38 328.00 18.93 82.00 1.23 W1 7.00
26.92 35.60 2.05 5.09 0.08 W1 4.00 15.38 98.90 5.71 24.73 0.37 W1
4.00 15.38 440.00 25.40 110.00 1.65 W1 7.00 26.92 830.00 47.91
118.57 1.78 W2 6.00 27.27 175.00 12.08 29.17 0.44 W2 4.00 18.18
152.00 10.49 38.00 0.58 W2 4.00 18.18 19.00 1.31 4.75 0.07 W2 3.00
13.64 362.00 24.98 120.67 1.83 W2 5.00 22.73 741.00 51.14 148.20
2.25 W3 1.00 4.55 206.00 19.32 206.00 4.25 W3 2.00 9.09 450.00
42.21 225.00 4.64 W3 5.00 22.73 51.00 4.79 10.20 0.21 W3 4.00 18.18
116.00 10.88 29.00 0.60 W3 4.00 18.18 0.00 0.00 0.00 0.00 W3 3.00
13.64 142.00 13.32 47.33 0.98 W3 3.00 13.64 101.00 9.48 33.67 0.70
W4 4.27 26.42 68.30 10.20 16.00 0.39 W4 3.96 24.50 68.00 10.10
17.17 0.41 W4 3.35 20.73 200.00 29.80 59.70 1.44 W4 3.05 18.87 0.00
0.00 0.00 0.00 W4 1.53 9.47 334.00 49.80 218.30 5.26 W5 11.00 36.67
0.00 0.00 0.00 0.00 W5 5.00 16.67 0.00 0.00 0.00 0.00 W5 6.00 20.00
410.00 32.80 68.33 1.64 W5 8.00 26.67 840.00 67.20 105.00 2.52 W6
4.50 13.04 5.00 0.60 1.11 0.05 W6 30.00 86.96 835.00 99.64 27.83
1.15 W7 2.50 27.78 480.00 30.38 192.00 1.09 W7 1.50 16.67 640.00
40.51 426.67 2.43 W7 5.00 55.56 460.00 29.11 92.00 0.52 W8 21.00
57.53 1016.00 34.75 48.38 0.60 W8 5.50 15.07 46.00 1.57 8.36 0.10
W8 10.00 27.40 1862.00 63.68 186.20 2.32 W9 6.25 17.11 242.00 5.70
38.72 0.33 W9 8.08 22.12 994.00 23.30 123.02 1.05 W9 3.81 10.43
258.00 6.00 67.72 0.58 W9 2.89 7.91 0.00 0.00 0.00 0.00 W9 1.83
5.01 0.00 0.00 0.00 0.00 W9 3.66 10.02 0.00 0.00 0.00 0.00 W9 3.50
9.58 1089.00 25.50 311.14 2.66 W9 3.81 10.43 62.90 1.50 16.51 0.14
W9 2.69 7.37 1625.00 38.00 604.09 5.16 W10 3.20 31.16 283.28 10.09
88.52 0.32 W10 2.09 20.35 838.62 29.88 401.25 1.47 W10 4.98 48.49
1684.50 60.02 338.25 1.24 W11 9.00 14.52 1300.00 34.99 144.44 2.41
W11 23.00 37.10 1450.00 39.03 63.04 1.05 W11 30.00 48.39 965.00
25.98 32.17 0.54 W12 8.08 11.86 714.00 15.40 88.37 1.30 W12 3.50
5.14 0.00 0.00 0.00 0.00 W12 7.77 11.41 459.00 9.90 59.07 0.87 W12
17.07 25.06 1998.00 43.00 117.05 1.72 W12 26.06 38.26 1214.00 26.10
46.58 0.68 W12 5.64 8.28 265.00 5.70 46.99 0.69 W13 10.00 36.63
913.00 23.99 91.30 0.66 W13 8.10 29.67 2316.00 60.87 285.93 2.05
W13 5.10 18.68 289.00 7.60 56.67 0.41 W13 4.10 15.02 185.00 4.86
45.12 0.32 W14 8.00 22.22 660.00 13.27 82.50 0.60 W14 21.00 58.33
3180.00 63.92 151.43 1.10 W14 7.00 19.44 1135.00 22.81 162.14 1.17
W15 2.00 16.95 60.08 7.08 30.04 0.42 W15 2.80 23.73 230.37 27.15
82.27 1.14 W15 3.00 25.42 50.72 5.98 16.91 0.24 W15 4.00 33.90
507.40 59.79 126.85 1.76 W16 2.50 21.74 934.00 61.21 373.60 2.82
W16 6.00 52.17 592.00 38.79 98.67 0.74 W16 3.00 26.09 0.00 0.00
0.00 0.00 W17 8.00 15.38 136.00 3.40 17.00 0.22 W17 9.00 17.31
22.00 0.50 2.44 0.03 W17 15.00 28.85 1575.00 39.30 105.00 1.36 W17
10.00 19.23 1037.00 25.90 103.70 1.35 W17 10.00 19.23 1236.00 30.90
123.60 1.61 W18 6.20 51.67 1786.60 56.99 288.16 1.10 W18 5.80 48.33
1348.30 43.01 232.47 0.89 W19 3.97 42.69 1537.00 79.00 387.15 1.85
W19 1.22 13.12 336.00 17.00 275.41 1.30 W19 4.11 44.19 73.60 4.00
17.91 0.09 W20 6.00 12.00 547.00 13.90 91.17 1.16 W20 17.00 34.00
1270.00 32.30 74.71 0.95 W20 21.00 42.00 1680.00 42.80 80.00 1.02
W20 6.00 12.00 430.00 10.90 71.67 0.91 W21 7.00 21.21 1396.00 90.80
199.43 4.28 W21 6.00 18.18 0.00 0.00 0.00 0.00 W21 20.00 60.61
141.00 9.20 7.05 0.15 W22 5.25 18.68 139.00 5.36 26.48 0.29 W22
3.75 13.34 211.00 8.14 56.27 0.61 W22 10.76 38.28 628.00 24.23
58.36 0.63 W22 3.02 10.74 745.00 28.74 246.69 2.68 W22 5.33 18.96
869.00 33.53 163.04 1.77 W23 7.00 12.87 540.00 20.29 77.14 1.58 W23
18.00 33.09 111.16 4.11 6.18 0.12 W23 12.00 22.06 733.47 27.56
61.12 1.25 W23 6.00 11.03 74.14 2.74 12.36 0.25 W23 8.40 15.44
274.62 10.32 32.69 0.67 W23 3.00 5.51 929.02 34.98 309.67 6.34 W24
7.00 12.73 502.00 17.35 71.71 1.36 W24 18.00 32.73 55.80 1.93 3.10
0.06 W24 12.00 21.82 806.00 27.86 67.17 1.28 W24 6.00 10.91 254.00
8.78 42.33 0.80 W24 12.00 21.82 1275.00 44.07 106.25 2.02 W25 1.99
6.07 5.72 0.27 2.87 0.04 W25 1.83 5.58 79.40 3.72 43.39 0.67 W25
4.88 14.89 349.00 16.35 71.52 1.10 W25 3.20 9.76 0.00 0.00 0.00
0.00 W25 1.98 6.04 253.00 11.86 127.78 1.96 W25 8.99 27.43 249.00
11.67 27.70 0.43 W25 6.86 20.93 743.00 34.82 108.31 1.66 W25 3.05
9.30 455.00 21.32 149.18 2.29
[0029] (2) Determination of the Yield Contribution Values Per Unit
Thickness for Single-Reservoir Stratum
[0030] The single layer of which the yield contribution value per
unit thickness for single-reservoir stratum is too low is not
sufficient to influence the water-flooding development of the oil
pool, and does not have a value for thief zone recognition, thus,
there is a need of determining a smallest yield contribution value
per unit thickness for single-reservoir stratum. Due to the
differences in the factors such as the physical properties of the
oil pool, the smallest yield contribution values per unit thickness
for single-reservoir stratum of different oil pools should be
different, and generally can be a half of the average value of the
yield contribution values per unit thickness for single-reservoir
stratum. The average value of the yield contribution values per
unit thickness for single-reservoir stratum in this embodiment is
98.53 stb/ft, and the smallest yield contribution value per unit
thickness for single-reservoir stratum can be 50 stb/ft.
[0031] (3) Determination of the Relative Contribution Coefficient
for the Thief Zone Judging
[0032] The relative contribution coefficient is a ratio of the
yield contribution value per unit thickness for single-reservoir
stratum to the total yield per unit thickness, the larger value for
the ratio is, the greater the productivity of the single layer is.
The contribution of the productivity of the thief zone is greater
than that of the overall productivity of the reservoir stratums. In
general, the relative contribution coefficient for thief zone
judging is greater than or equal to 2, and is 2 in this
example.
[0033] (4) Drawing a Discrimination Graph of the Relative
Contribution Coefficient and the Yield Contribution Value Per Unit
Thickness for Single-Reservoir Stratum.
[0034] The discrimination graph is drawn by taking the yield
contribution value per unit thickness for single-reservoir stratum
as the abscissa, and the relative contribution coefficient as the
ordinate. According to the judging conditions applicable for
different oil pools, the discrimination graph of the relative
contribution rates and the per unit yield contributions is divided
into three areas. The smallest yield contribution value per unit
thickness for single-reservoir stratum in this embodiment is 50
stb/ft, the relative contribution coefficient for thief zone
judging is 2, and the three discrimination areas (i.e., the area
that is not considered, the thief zone-developed area and the thief
zone-undeveloped area) are as shown in FIGS. 2 and 3.
[0035] (5) Performance of Thief Zone Recognition Based on the
Discrimination Graph
[0036] The recognition result is shown in FIG. 3, in which the area
that is not considered, the thief zone-developed area and the thief
zone-undeveloped area are represented by means of dotted lines.
[0037] 1. According to the discrimination graph of the relative
contribution rates and the yield contribution values per unit
thickness for single-reservoir stratum, in the data in this
embodiment, data points (the data points include: yield
contribution values per unit thickness for single-reservoir stratum
and the relative contribution coefficients) of 72 single layers are
located on the left of the graph (i.e., in the area that is not
considered), in other words, the abscissa values thereof are
smaller than the smallest yield contribution value per unit
thickness for single-reservoir stratum. It indicates that the per
unit yield contributions of this layer are not sufficient to cause
influences to the water-flooding development of the oil pool, and
thus are not considered.
[0038] 2. Data points of 21 single layers are located on the lower
right side of the discrimination graph (i.e., in the thief
zone-undeveloped area). The per unit yield contributions of these
single layers have reached the level that can influence the
water-flooding development of the oil pool, but the relative
contribution coefficients are relative low, and thus these layers
are recognized to be non-thief zones.
[0039] 3. Data points of 17 single layers are distributed on the
upper right side of the discrimination graph (i.e., in the thief
zone-developed area). It indicates that the per unit yield
contribution values thereof have reached the level that can
influence the water-flooding development of the oil pool, and the
relative contribution coefficients are higher than that of the
ordinary reservoir stratums, and thus these layers are recognized
to be thief zones.
[0040] The embodiments of the present invention also provide a
computer readable storage medium comprising computer readable
instructions, and the computer readable instructions enable the
processor to at least execute the following operations when the
computer readable instructions are executed: calculating a yield
contribution value per unit thickness for single-reservoir stratum
and a relative contribution coefficient of individual reservoir
stratums in oil pool production logging, wherein, the yield
contribution value per unit thickness for single-reservoir stratum
is a ratio of a single-reservoir stratum yield to a
single-reservoir stratum thickness, and the relative contribution
coefficient is a ratio of the yield contribution value per unit
thickness for single-reservoir stratum to a yield per unit
thickness for the whole reservoir stratum interval; determining a
smallest yield contribution value per unit thickness for
single-reservoir stratum and a smallest relative contribution
coefficient from the yield contribution values per unit thickness
for single-reservoir stratum and the relative contribution
coefficients in the oil pool production logging, according to the
characteristics of different oil pools, wherein, the smallest yield
contribution value per unit thickness for single-reservoir stratum
and the smallest relative contribution coefficient meet the
requirements of thief zone recognition for different oil pools;
calculating the yield contribution value per unit thickness for
single-reservoir stratum and the relative contribution coefficient
of each reservoir stratum of each well in the oil pool
to-be-measured; determining whether or not a thief zone is
developed for each reservoir stratum of each well, according to a
magnitude relationship between the yield contribution value per
unit thickness for single-reservoir stratum of each reservoir
stratum of each well and the smallest yield contribution value per
unit thickness for single-reservoir stratum and according to a
magnitude relationship between the relative contribution
coefficient of each reservoir stratum of each well and the smallest
relative contribution coefficient.
[0041] In one embodiment, the above computer readable instructions
enable the processor to: draw a graph by taking the yield
contribution value per unit thickness for single-reservoir stratum
of individual reservoir stratum in the oil pool production logging
as an ordinate and the relative contribution coefficient of
individual reservoir stratum in the oil pool production logging as
an abscissa, wherein, an intersection line of the smallest yield
contribution value per unit thickness for single-reservoir stratum
and the smallest relative contribution coefficient divides the
graph into different areas; and determine whether or not a thief
zone is developed for each reservoir stratum of each well according
to the distribution positions of the yield contribution value per
unit thickness for single-reservoir stratum of each reservoir
stratum of each well and the relative contribution coefficient of
each reservoir stratum of each well in different areas of the
graph.
[0042] In one embodiment, the above computer readable instruction
enable the processor: not to judge the reservoir stratum of which
the yield contribution value per unit thickness for
single-reservoir stratum is smaller than the smallest yield
contribution value per unit thickness for single-reservoir stratum;
to determine the reservoir stratum of which the yield contribution
value per unit thickness for single-reservoir stratum is greater
than the smallest yield contribution value per unit thickness for
single-reservoir stratum and the relative contribution coefficient
is smaller than the smallest relative contribution coefficient to
be a non-thief zone; and to determine the reservoir stratum of
which the yield contribution value per unit thickness for
single-reservoir stratum is greater than the smallest yield
contribution value per unit thickness for single-reservoir stratum
and the relative contribution coefficient is greater than the
smallest relative contribution coefficient to be a thief zone.
[0043] In a concrete implementation, the above computer readable
storage medium can comprise a physical device for storage of
information, which can digitize the information and store the
information with an electrical, a magnetic, or an optical medium.
The computer readable storage medium in this embodiment can
comprise: a device that uses electrical energy to store
information, which can be various types of memories such as a RAM,
a ROM, etc.; a device that uses magnetic energy to store
information, which can be a hard disc, a floppy disk, a magnetic
tape, a magnetic core memory, a magnetic bubble memory, a usb flash
disk, etc.; and a device that stores information through optical
means, which can be a CD, a DVD, etc. Of course, there are other
types of readable storage media, such as a quantum memory, a
graphene memory, etc.
[0044] The embodiments of the present invention also provide a
computer apparatus, as shown in FIG. 4, the computer apparatus
comprises: a processor 401; and a memory 402 comprising computer
readable instructions, the memory 402 coupled to the processor 401.
The computer readable instructions enable the processor to at least
execute the following operations when the computer readable
instructions are executed: calculating a yield contribution value
per unit thickness for single-reservoir stratum and a relative
contribution coefficient of individual reservoir stratum in the oil
pool production logging, wherein, the yield contribution value per
unit thickness for single-reservoir stratum is a ratio of a
single-reservoir stratum yield to a single-reservoir stratum
thickness, and the relative contribution coefficient is a ratio of
the yield contribution value per unit thickness for
single-reservoir stratum to a yield per unit thickness for the
whole reservoir stratum interval; determining a smallest yield
contribution value per unit thickness for single-reservoir stratum
and a smallest relative contribution coefficient, from the yield
contribution values per unit thickness for single-reservoir stratum
and the relative contribution coefficients in the oil pool
production logging, according to the characteristics of different
oil pools, wherein, the smallest yield contribution value per unit
thickness for single-reservoir stratum and the smallest relative
contribution coefficient meet the requirements of thief zone
recognition for different oil pools; calculating the yield
contribution value per unit thickness for single-reservoir stratum
and the relative contribution coefficient of each reservoir stratum
of each well in the oil pool to-be-measured; determining whether or
not a thief zone is developed for each reservoir stratum of each
well, according to a magnitude relationship between the yield
contribution value per unit thickness for single-reservoir stratum
of each reservoir stratum of each well and the smallest yield
contribution value per unit thickness for single-reservoir stratum
and according to a magnitude relationship between the relative
contribution coefficient of each reservoir stratum of each well and
the smallest relative contribution coefficient.
[0045] In one embodiment, the above computer readable instructions
enable the processor: to draw a graph by taking the yield
contribution value per unit thickness for single-reservoir stratum
of individual reservoir stratum in the oil pool production logging
as an ordinate and the relative contribution coefficient of
individual reservoir stratum in the oil pool production logging as
an abscissa, wherein, an intersection line of the smallest yield
contribution value per unit thickness for single-reservoir stratum
and the smallest relative contribution coefficient divides the
graph into different areas; and to determine whether or not a thief
zone is developed for each reservoir stratum of each well,
according to the distribution positions of the yield contribution
value per unit thickness for single-reservoir stratum of each
reservoir stratum of each well and the relative contribution
coefficient of each reservoir stratum of each well in different
areas of the graph.
[0046] In one embodiment, the above computer readable instructions
enable the processor: not to judge the reservoir stratum of which
the yield contribution value per unit thickness for
single-reservoir stratum is smaller than the smallest yield
contribution value per unit thickness for single-reservoir stratum;
to determine the reservoir stratum of which the yield contribution
value per unit thickness for single-reservoir stratum is greater
than the smallest yield contribution value per unit thickness for
single-reservoir stratum and the relative contribution coefficient
is smaller than the smallest relative contribution coefficient to
be a non-thief zone; and to determine the reservoir stratum of
which the yield contribution value per unit thickness for
single-reservoir stratum is greater than the smallest yield
contribution value per unit thickness for single-reservoir stratum
and the relative contribution coefficient is greater than the
smallest relative contribution coefficient to be a thief zone.
[0047] In the embodiments of the present invention, whether or not
a thief zone is developed for each reservoir stratum of each well
can be determined quickly by: calculating the yield contribution
value per unit thickness for single-reservoir stratum and the
relative contribution coefficient of individual reservoir stratums
in the oil pool production logging (for example, the yield
contribution value per unit thickness for single-reservoir stratum
and the relative contribution coefficient of individual reservoir
stratum in the oil pool production logging can be calculated based
on dynamic monitoring data on the oil pool production logging),
determining the smallest yield contribution value per unit
thickness for single-reservoir stratum and the smallest relative
contribution coefficient according to the characteristics of
different oil pools, and at last, whether or not a thief zone is
developed for each reservoir stratum of each well can be determined
fast according to a magnitude relationship between the yield
contribution value per unit thickness for single-reservoir stratum
of each reservoir stratum of each well and the smallest yield
contribution value per unit thickness for single-reservoir stratum
and according to a magnitude relationship between the relative
contribution coefficient of each reservoir stratum of each well and
the smallest relative contribution coefficient. Since the
calculation of the yield contribution value per unit thickness for
single-reservoir stratum and the relative contribution coefficient
has fully considered the influence of thickness on yield
contribution, the thief zone recognition is allowed to be more in
line with actual situations, thus helping improving the accuracy of
the thief zone recognition.
[0048] The persons skilled in the art shall understand that the
embodiments of the present invention can be provided as a method, a
system, or a computer program product. Therefore, the present
invention can be implemented in the form of a complete hardware
embodiment, a complete software embodiment, or an embodiment that
combines software and hardware. In addition, the present invention
can be implemented in the form of a computer program product which
is implemented on a computer applicable storage medium (including
but not limited to a disk memory, a CD-ROM, an optical memory,
etc.) that includes computer applicable program codes.
[0049] The present invention is described with reference to the
flow chart and/or block diagram of the method, apparatus (system)
and computer program product according to the embodiments of the
present invention. It should be understood that each procedure
and/or box in the flow chart and/or block diagram and a combination
of the procedures and/or boxes in the flow chart and/or block
diagram can be realized by means of the computer program
instructions. The computer program instructions can be provided to
a general-purpose computer, a special-purpose computer, an embedded
processor or a processor of other programmable data processing
apparatuses to produce a machine, so that the instructions executed
by the computer or the processor of other programmable data
processing apparatuses generate a device used for realizing the
functions specified in one or more procedures in the flow chart
and/or one or more boxes in the block diagram.
[0050] These computer program instructions can also be stored in a
computer readable memory that can guide the computer or other
programmable data processing apparatuses to work in a specific way,
so that the instructions stored in the computer readable memory
generate a manufacture including an instruction device, which
instruction device realizes the functions specified in one or more
procedures in the flow chart and/or one or more boxes in the block
diagram.
[0051] These computer program instruction can also be loaded on a
computer or other programmable data processing apparatuses, so that
a series of operation steps are executed on the computer or other
programmable apparatuses to generate the processing realized by the
computer, and thus, the instructions executed on the computer or
other programmable apparatuses provide steps for realizing the
functions specified in one or more procedures in the flow chart
and/or one or more boxes in the block diagram.
[0052] The above mentioned specific embodiments further explain the
object, the technical solutions and the advantageous effects of the
present invention. It should be understood that the above content
is merely the specific embodiments of the present invention, and is
not used to limit the protection scope of the present invention.
Any amendments, equivalent substitutions and improvements within
the spirit and principle of the present invention should be
included in the protection scope of the present invention.
* * * * *