U.S. patent application number 14/984815 was filed with the patent office on 2017-01-05 for stratigraphic correlation method and apparatus based on uncertainty.
The applicant listed for this patent is PetroChina Company Limited. Invention is credited to Yan Gao, Baozhu Li, Yong Li, Shuangshuang Liu, Zhuo Liu, Hong Luo, Qihao Qian, Benbiao Song, Changbing Tian, Chenji Wei, Weimin Zhang, Yixiang Zhu.
Application Number | 20170002643 14/984815 |
Document ID | / |
Family ID | 54570889 |
Filed Date | 2017-01-05 |
United States Patent
Application |
20170002643 |
Kind Code |
A1 |
Gao; Yan ; et al. |
January 5, 2017 |
Stratigraphic Correlation Method And Apparatus Based on
Uncertainty
Abstract
The present invention provides a stratigraphic correlation
method and apparatus based on uncertainty. The stratigraphic
correlation method comprises: determining a plurality of possible
correlation positions in a well with uncertain layered position in
a profile, in a stratigraphic correlation process; assigning a
qualitative or quantitative certainty value to the plurality of
correlation positions; and storing and displaying the plurality of
correlation positions and certainty values thereof as different
layered solutions on the profile, respectively. By setting a
plurality of position solutions for a layer in the present
invention, all possibilities of the layered position judged by the
geological personnel can be recorded as references for the
subsequent correlation of other profiles, the closing of the whole
layered solution, and the quality control.
Inventors: |
Gao; Yan; (Beijing, CN)
; Tian; Changbing; (Beijing, CN) ; Zhu;
Yixiang; (Beijing, CN) ; Li; Baozhu; (Beijing,
CN) ; Zhang; Weimin; (Beijing, CN) ; Luo;
Hong; (Beijing, CN) ; Liu; Shuangshuang;
(Beijing, CN) ; Liu; Zhuo; (Beijing, CN) ;
Qian; Qihao; (Beijing, CN) ; Song; Benbiao;
(Beijing, CN) ; Li; Yong; (Beijing, CN) ;
Wei; Chenji; (Beijing, CN) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
PetroChina Company Limited |
Beijing |
|
CN |
|
|
Family ID: |
54570889 |
Appl. No.: |
14/984815 |
Filed: |
December 30, 2015 |
Current U.S.
Class: |
1/1 |
Current CPC
Class: |
G01V 2200/14 20130101;
G01V 2210/66 20130101; G01V 2210/667 20130101; G01V 11/00 20130101;
G01V 99/005 20130101 |
International
Class: |
E21B 47/00 20060101
E21B047/00 |
Foreign Application Data
Date |
Code |
Application Number |
Jul 1, 2015 |
CN |
201510379359.9 |
Claims
1. A stratigraphic correlation method based on uncertainty,
comprising: determining a plurality of possible correlation
positions in a well with uncertain layered position in a profile,
in a stratigraphic correlation process; assigning a qualitative or
quantitative certainty value to the plurality of correlation
positions; and storing and displaying the plurality of correlation
positions and certainty values thereof as different layered
solutions on the profile, respectively.
2. The stratigraphic correlation method based on uncertainty
according to claim 1, further comprising: displaying the
correlation position and the certainty value of the well in the
current profile, respectively, when other profile passes through
the well.
3. The stratigraphic correlation method based on uncertainty
according to claim 2, further comprising: modifying the certainty
value of the layered solution according to a correlation result of
the current profile.
4. The stratigraphic correlation method based on uncertainty
according to claim 2 or 3, further comprising: adding a new layered
solution according to a correlation result of the current profile
and determining a certainty value thereof.
5. The stratigraphic correlation method based on uncertainty
according to claim 4, wherein after stratigraphic correlations of
all wells are completed, a certainty contour map is obtained by
interpolation according to a certainty value of each layered
solution at well points.
6. The stratigraphic correlation method based on uncertainty
according to claim 4, wherein after stratigraphic correlations of
all wells are completed, a most possible certainty contour map for
each layer is obtained by interpolation according to a layered
solution corresponding to a maximum certainty value of the
layer.
7. The stratigraphic correlation method based on uncertainty
according to claim 4, wherein after all wells are closed, an
average certainty value of all wells in each layered solution or an
average maximum certainty value of all wells in each layer is
counted.
8. A stratigraphic correlation apparatus based on uncertainty,
comprising: a position determination unit configured to determine a
plurality of possible correlation positions in a well with
uncertain layered position in a profile, in a stratigraphic
correlation process; an assignment unit configured to assign a
qualitative or quantitative certainty value to the plurality of
correlation positions; and a display unit configured to store and
display the plurality of correlation positions and certainty values
thereof as different layered solutions on the profile,
respectively.
9. The stratigraphic correlation apparatus based on uncertainty
according to claim 8, wherein the display unit is further
configured to display the correlation position and the certainty
value of the well in the current profile, respectively, when other
profile passes through the well.
10. The stratigraphic correlation apparatus based on uncertainty
according to claim 9, further comprising a modification unit
configured to modify the certainty value of the layered solution
according to a correlation result of the current profile.
11. The stratigraphic correlation apparatus based on uncertainty
according to claim 9 or 10, further comprising a solution addition
unit configured to add a new layered solution according to a
correlation result of the current profile and determine a certainty
value thereof.
12. The stratigraphic correlation apparatus based on uncertainty
according to claim 11, further comprising a first interpolation
unit configured to obtain a certainty contour map by interpolation
according to a certainty value of each layered solution at well
points, after stratigraphic correlations of all wells are
completed.
13. The stratigraphic correlation apparatus based on uncertainty
according to claim 11, further comprising a second interpolation
unit configured to obtain a most possible certainty contour map for
each layer by interpolation according to a layered solution
corresponding to a maximum certainty value of the layer, after
stratigraphic correlations of all wells are completed.
14. The stratigraphic correlation apparatus based on uncertainty
according to claim 11, further comprising a counting unit
configured to count an average certainty value of all wells in each
layered solution or an average maximum certainty value of all wells
in each layer, after all wells are closed.
15. A computer readable storage medium containing computer readable
instructions which when being executed, cause a processor to at
least: determine a plurality of possible correlation positions in a
well with uncertain layered position in a profile, in a
stratigraphic correlation process; assign a qualitative or
quantitative certainty value to the plurality of correlation
positions; and store and display the plurality of correlation
positions and certainty values thereof as different layered
solutions on the profile, respectively.
16. The computer readable storage medium according to claim 15,
wherein the computer readable instructions further cause the
processor to display the correlation position and the certainty
value of the well in the current profile, respectively, when other
profile passes through the well.
17. The computer readable storage medium according to claim 16,
wherein the computer readable instructions further cause the
processor to modify the certainty value of the layered solution
according to a correlation result of the current profile.
18. The computer readable storage medium according to claim 16 or
17, wherein the computer readable instructions further cause the
processor to add a new layered solution according to a correlation
result of the current profile and determine a certainty value
thereof.
19. The computer readable storage medium according to claim 18,
wherein after stratigraphic correlations of all wells are
completed, the computer readable instructions further cause the
processor to obtain a certainty contour map by interpolation
according to a certainty value of each layered solution at well
points.
20. The computer readable storage medium according to claim 18,
wherein after stratigraphic correlations of all wells are
completed, the computer readable instructions further cause the
processor to obtain a most possible certainty contour map for each
layer by interpolation according to a layered solution
corresponding to a maximum certainty value of the layer.
21. The computer readable storage medium according to claim 18,
wherein after all wells are closed, the computer readable
instructions further cause the processor to count an average
certainty value of all wells in each layered solution or an average
maximum certainty value of all wells in each layer.
22. A device, comprising: a processor; and a memory containing
computer readable instructions which when being executed, cause the
processor to: determine a plurality of possible correlation
positions in a well with uncertain layered position in a profile,
in a stratigraphic correlation process; assign a qualitative or
quantitative certainty value to the plurality of correlation
positions; and store and display the plurality of correlation
positions and certainty values thereof as different layered
solutions on the profile, respectively.
23. The device according to claim 22, wherein the computer readable
instructions further cause the processor to display the correlation
position and the certainty value of the well in the current
profile, respectively, when other profile passes through the
well.
24. The device according to claim 23, wherein the computer readable
instructions further cause the processor to modify the certainty
value of the layered solution according to a correlation result of
the current profile.
25. The device according to claim 23 or 24, wherein the computer
readable instructions further cause the processor to add a new
layered solution according to a correlation result of the current
profile and determine a certainty value thereof.
26. The device according to claim 25, wherein after stratigraphic
correlations of all wells are completed, the computer readable
instructions further cause the processor to obtain a certainty
contour map by interpolation according to a certainty value of each
layered solution at well points.
27. The device according to claim 25, wherein after stratigraphic
correlations of all wells are completed, the computer readable
instructions further cause the processor to obtain a most possible
certainty contour map for each layer by interpolation according to
a layered solution corresponding to a maximum certainty value of
the layer.
28. The device according to claim 25, wherein after all wells are
closed, the computer readable instructions further cause the
processor to count an average certainty value of all wells in each
layered solution or an average maximum certainty value of all wells
in each layer.
Description
RELATED APPLICATION
[0001] This application claims priority under 35 U.S.C. .sctn.119
or 365 to China, Application No. 201510379359.9, filed Jul. 1,
2105.
[0002] The entire teachings of the above application(s) are
incorporated herein by reference.
FIELD OF THE INVENTION
[0003] The present invention relates to technologies of performing
stratigraphic correlation through uncertainty, and particularly, to
a stratigraphic correlation method and apparatus based on
uncertainty.
BACKGROUND OF THE INVENTION
[0004] In a stratigraphic correlation process using well logging
curves, the following problems usually appear: the layered position
of a layer is uncertain in a well, a layer has inconsistent
positions in different profiles through the same well, etc.
Regarding those problems, the prior arts often determine a layered
position by experiences, and then confirm it in the subsequent
correlation or closing check. But when the layer is complex, the
number of the layered wells is huge, and the layered position has a
high interpretation ambiguity, phenomena such as mistake, omission,
repetition, and even difficulty in closing will easily occur in the
subsequent check, thus the reliability of the layering result
decreases, which further affects the subsequent geological
works.
SUMMARY OF THE INVENTION
[0005] The embodiments of the present invention provide a
stratigraphic correlation method and apparatus based on
uncertainty, to record all possibilities of the layered position
judged by the geological personnel as references for the subsequent
correlation of other profiles, the closing of the whole layered
solution, and the quality control.
[0006] In order to achieve the above object, the embodiments of the
present invention provide a stratigraphic correlation method based
on uncertainty, comprising:
[0007] determining a plurality of possible correlation positions in
a well with uncertain layered position in a profile, in a
stratigraphic correlation process;
[0008] assigning a qualitative or quantitative certainty value to
the plurality of correlation positions; and
[0009] storing and displaying the plurality of correlation
positions and certainty values thereof as different layered
solutions on the profile, respectively.
[0010] In one embodiment, the stratigraphic correlation method
further comprises: displaying the correlation position and the
certainty value of the well in the current profile, respectively,
when other profile passes through the well.
[0011] In one embodiment, the stratigraphic correlation method
further comprises: modifying the certainty value of the layered
solution according to a correlation result of the current
profile.
[0012] In one embodiment, the stratigraphic correlation method
further comprises: adding a new layered solution according to a
correlation result of the current profile and determining a
certainty value thereof.
[0013] In one embodiment, after stratigraphic correlations of all
wells are completed, a certainty contour map is obtained by
interpolation according to a certainty value of each layered
solution at well points.
[0014] In one embodiment, after stratigraphic correlations of all
wells are completed, a most possible certainty contour map for each
layer is obtained by interpolation according to a layered solution
corresponding to a maximum certainty value of the layer.
[0015] In one embodiment, after layers in all wells are closed, an
average certainty value of all wells in each layered solution or an
average maximum certainty value of all wells in each layer is
counted.
[0016] In order to achieve the above object, the embodiments of the
present invention further provide a stratigraphic correlation
apparatus based on uncertainty, comprising:
[0017] a position determination unit configured to determine a
plurality of possible correlation positions in a well with
uncertain layered position in a profile, in a stratigraphic
correlation process;
[0018] an assignment unit configured to assign a qualitative or
quantitative certainty value to the plurality of correlation
positions; and
[0019] a display unit configured to store and display the plurality
of correlation positions and certainty values thereof as different
layered solutions on the profile, respectively.
[0020] In one embodiment, the display unit is further configured to
display the correlation position and the certainty value of the
well in the current profile, respectively, when other profile
passes through the well.
[0021] In one embodiment, the stratigraphic correlation apparatus
further comprises a modification unit configured to modify the
certainty value of the layered solution according to a correlation
result of the current profile.
[0022] In one embodiment, the stratigraphic correlation apparatus
further comprises a solution addition unit configured to add a new
layered solution according to a correlation result of the current
profile and determine a certainty value thereof.
[0023] In one embodiment, the stratigraphic correlation apparatus
further comprises a first interpolation unit configured to obtain a
certainty contour map by interpolation according to a certainty
value of each layered solution at well points, after stratigraphic
correlations of all wells are completed.
[0024] In one embodiment, the stratigraphic correlation apparatus
further comprises a second interpolation unit configured to obtain
a most possible certainty contour map for each layer by
interpolation according to a layered solution corresponding to a
maximum certainty value of the layer, after stratigraphic
correlations of all wells are completed.
[0025] In one embodiment, the stratigraphic correlation apparatus
further comprises a counting unit configured to count an average
certainty value of all wells in each layered solution or an average
maximum certainty value of all wells in each layer, after all wells
are closed.
[0026] In order to achieve the above object, the embodiments of the
present invention further provide a computer readable storage
medium containing computer readable instructions which when being
executed, cause a processor to at least:
[0027] determine a plurality of possible correlation positions in a
well with uncertain layered position in a profile, in a
stratigraphic correlation process;
[0028] assign a qualitative or quantitative certainty value to the
plurality of correlation positions; and
[0029] store and display the plurality of correlation positions and
certainty values thereof as different layered solutions on the
profile, respectively.
[0030] In one embodiment, the computer readable instructions
further cause the processor to display the correlation position and
the certainty value of the well in the current profile,
respectively, when other profile passes through the well.
[0031] In one embodiment, the computer readable instructions
further cause the processor to modify the certainty value of the
layered solution according to a correlation result of the current
profile.
[0032] In one embodiment, the computer readable instructions
further cause the processor to add a new layered solution according
to a correlation result of the current profile and determine a
certainty value thereof.
[0033] In one embodiment, after stratigraphic correlations of all
wells are completed, the computer readable instructions further
cause the processor to obtain a certainty contour map by
interpolation according to a certainty value of each layered
solution at well points.
[0034] In one embodiment, after stratigraphic correlations of all
wells are completed, the computer readable instructions further
cause the processor to obtain a most possible certainty contour map
for each layer by interpolation according to a layered solution
corresponding to a maximum certainty value of the layer.
[0035] In one embodiment, after all wells are closed, the computer
readable instructions further cause the processor to count an
average certainty value of all wells in each layered solution or an
average maximum certainty value of all wells in each layer.
[0036] In order to achieve the above object, the embodiments of the
present invention further provide a device, comprising:
[0037] a processor; and
[0038] a memory containing computer readable instructions which
when being executed, cause the processor to:
[0039] determine a plurality of possible correlation positions in a
well with uncertain layered position in a profile, in a
stratigraphic correlation process;
[0040] assign a qualitative or quantitative certainty value to the
plurality of correlation positions; and
[0041] store and display the plurality of correlation positions and
certainty values thereof as different layered solutions on the
profile, respectively.
[0042] In one embodiment, the computer readable instructions
further cause the processor to display the correlation position and
the certainty value of the well in the current profile,
respectively, when other profile passes through the well.
[0043] In one embodiment, the computer readable instructions
further cause the processor to modify the certainty value of the
layered solution according to a correlation result of the current
profile.
[0044] In one embodiment, the computer readable instructions
further cause the processor to add a new layered solution according
to a correlation result of the current profile and determine a
certainty value thereof.
[0045] In one embodiment, after stratigraphic correlations of all
wells are completed, the computer readable instructions further
cause the processor to obtain a certainty contour map by
interpolation according to a certainty value of each layered
solution at well points.
[0046] In one embodiment, after stratigraphic correlations of all
wells are completed, the computer readable instructions further
cause the processor to obtain a most possible certainty contour map
for each layer by interpolation according to a layered solution
corresponding to a maximum certainty value of the layer.
[0047] In one embodiment, after all wells are closed, the computer
readable instructions further cause the processor to count an
average certainty value of all wells in each layered solution or an
average maximum certainty value of all wells in each layer.
[0048] The embodiments of the present invention have the following
beneficial effects:
[0049] (1) By setting a plurality of position solutions for a
layer, all possibilities of the layered position judged by the
geological personnel can be recorded as references for the
subsequent correlation of other profiles, the closing of the whole
layered solution, and the quality control.
[0050] (2) By setting an accuracy for each position solution, the
possibility of each solution can be determined and recorded,
thereby further facilitating the subsequent correlation of profiles
and the quality control of the whole layered solution.
[0051] (3) By making a contour map for certainties of each layer, a
well with a higher uncertainty can be quickly found in the process
of the layer correlation, so that the closing and the quality
control are more targeted, and the closing efficiency is greatly
improved.
[0052] (4) By recording certainty data in the layering process, a
data basis can be provided for the final uncertainty analysis, thus
it is possible to quantize the uncertainty in the stratigraphic
correlation, which solves the problem that the stratigraphic
correlation uncertainty is difficult to be quantized.
[0053] (5) By implementation of the method of the invention, the
workload of closing and quality control at the later stage can be
greatly reduced while the workload in the layering process at the
earlier stage is slightly increased. In addition, the layering
result is more accurate and reliable, and the working efficiency is
improved.
BRIEF DESCRIPTION OF THE DRAWINGS
[0054] In order to more clearly describe the technical solutions in
the embodiments of the present invention or the prior art,
accompanying drawings to be used in the descriptions of the
embodiments or the prior art will be briefly introduced as follows.
Obviously, the accompanying drawings in the following descriptions
just illustrate some embodiments of the present invention, and a
person skilled in the art can obtain other accompanying drawings
from them without paying any creative effort.
[0055] FIG. 1 is a flowchart of a stratigraphic correlation method
based on uncertainty in an embodiment of the present invention;
[0056] FIG. 2 is a schematic diagram of a cross section profile
passing through a north-south direction of well 2 in an embodiment
of the present invention;
[0057] FIG. 3 is a schematic diagram of a cross section profile
passing through an east-west direction of well 2 in an embodiment
of the present invention;
[0058] FIG. 4 is a schematic diagram of a contour map of certainty
in solution 1 of 5 layer B in an embodiment of the present
invention;
[0059] FIG. 5 is a schematic diagram of a contour map of certainty
in solution 2 of 5 layer B in an embodiment of the present
invention;
[0060] FIG. 6 is a histogram of distribution of average certainty
of each layer in an embodiment of the present invention;
[0061] FIG. 7 is a structural block diagram of a stratigraphic
correlation apparatus based on uncertainty in an embodiment of the
present invention;
[0062] FIG. 8 is a structural block diagram of a stratigraphic
correlation apparatus based on uncertainty in an embodiment of the
present invention;
[0063] FIG. 9 is a structural block diagram of a stratigraphic
correlation apparatus based on uncertainty in an embodiment of the
present invention;
[0064] FIG. 10 is a structural block diagram of a stratigraphic
correlation apparatus based on uncertainty in an embodiment of the
present invention;
[0065] FIG. 11 is a structural block diagram of a stratigraphic
correlation apparatus based on uncertainty in an embodiment of the
present invention; and
[0066] FIG. 12 is a structural block diagram of a device in an
embodiment of the present invention.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
[0067] The technical solutions in the embodiments of the present
invention will be clearly and completely described as follows with
reference to the accompanying drawings of the embodiments of the
present invention. Obviously, those described herein are just parts
of the embodiments of the present invention rather than all the
embodiments. Based on the embodiments of the present invention, any
other embodiment obtained by a person skilled in the art without
paying any creative effort shall fall within the protection scope
of the present invention.
[0068] The embodiments of the present invention provide a
stratigraphic correlation method based on uncertainty. As
illustrated in FIG. 1, the stratigraphic correlation method
comprises:
[0069] S101: determining a plurality of possible correlation
positions in a well with uncertain layered position in a profile,
in a stratigraphic correlation process;
[0070] S102: assigning a qualitative or quantitative certainty
value to the plurality of correlation positions.
[0071] In the stratigraphic correlation process, when the layered
position of a well is uncertain, several possible correlation
positions may be set in the well, and a qualitative (high, medium
and low) or quantitative (10%, 50% and 80%) certainty value may be
assigned to each position.
[0072] S103: storing and displaying the plurality of correlation
positions and certainty values thereof as different layered
solutions on the profile, respectively.
[0073] As can be seen from the flow of FIG. 1, in the stratigraphic
correlation process, the present invention firstly determines a
plurality of possible correlation positions in a well with
uncertain layered position in a profile, in a stratigraphic
correlation process, then assigns a qualitative or quantitative
certainty value to the plurality of correlation positions, and
finally stores and displays the plurality of correlation positions
and certainty values thereof as different layered solutions on the
profile, respectively.
[0074] After the flow of FIG. 1, in the stratigraphic correlation
process, other profile usually shall be analyzed, and when other
profile (also referred to as the current profile) passes through
the well with uncertain position in FIG. 1, the correlation
position and the certainty value of the well shall be displayed in
the current profile, respectively.
[0075] A correlation result of the layered correlation is generated
in the current profile, and the present invention can modify the
certainty value of the layered solution according to the
correlation result of the current profile, or add a new layered
solution according to the correlation result of the current profile
and determine a certainty value thereof.
[0076] After analyses of a plurality of profiles, the stratigraphic
correlations of all the wells can be completed. Next, a certainty
contour map can be obtained by interpolation according to the
certainty value of each layered solution at the well points. After
the stratigraphic correlations of all the wells are completed, the
most possible certainty contour map for each layer can be obtained
by interpolation according to a layered solution corresponding to a
maximum certainty value of the layer.
[0077] After the certainty contour map is obtained by
interpolation, the position of a well with poor certainty (less
than a predetermined value that is set upon actual conditions) can
be found according to the contour map, and making a new cross
section profile through the well, so as to further determine the
layered position and update corresponding certainty. The detailed
processing method is shown in the flow of FIG. 1.
[0078] Regarding a layer having multiple layered solutions with
slightly-different certainties and still difficult to be determined
in subsequent closing and quality control works, it may be analyzed
separately in another possible layered solution.
[0079] In one embodiment, after all the wells are closed (the same
well is adaptive to be layered in any profile), an average
certainty value of all the wells in each layered solution or an
average maximum certainty value of all the wells in each layer can
be counted.
[0080] In addition, if the certainty of a solution cannot be judged
for a layer, a plurality of cross section profiles can be made
through the well, and the most possible layered position is marked
on each profile, finally, the certainty of each layered position is
automatically assigned by counting occurrence frequency of the
layer at each position.
[0081] Next, the stratigraphic correlation method based on
uncertainty in the embodiment of the present invention will be
exemplarily described in details with reference to the accompanying
drawings.
[0082] FIG. 2 is a schematic diagram of a cross section profile
passing through a north-south direction of well 2. As illustrated
in FIG. 2, the profile orderly passes through the well logging
curve charts 1 to 3 of wells 1 to 3 from north to south. Assuming
that the segment of curve can be divided into three layers, i.e., 4
layer A, 5 layer B and 6 layer C, according to the given
stratigraphic framework. From the variation trend of the gamma
curve and the resistivity curve in the well logging chart, the
position of each layer in wells 1 and 3 and the positions of 4
layer A and 6 layer C in well 2 can be determined. The certainty
can be directly assigned with 1 without being considered specially.
Due to the curve variation, there are two layered solutions for 5
layer B in well 2, and it is difficult to determine which layered
solution is more accurate. Thus certainties 21 and 22 are
artificially assigned with 0.5 and 0.5 of the two layered solutions
51 and 52 in well 2.
[0083] FIG. 3 is a schematic diagram of a cross section profile
passing through an east-west direction of well 2 in an embodiment
of the present invention. In FIG. 3, the profile orderly passes
through the well logging curve charts 2, 7 and 8 of wells 2, 5 and
8 from west to east. From the variation trend of the well logging
curve near 5 layer B in well 5, it can be deemed that the solution
for 52 layer B2 of 5 layer B is more possible. Thus certainties 71
and 72 are artificially assigned with 0.1 and 0.9 of the two
layered solutions 51 and 52 in well 5. From the well logging curve
trend of well 5, it also can be predicted that solution 52 of 5
layer B is more possible in well 2. Thus certainty 22 is
artificially modified into 0.8, and certainty 21 is deceased to be
0.2.
[0084] FIG. 4 is a schematic diagram of a contour map of certainty
in solution 1 of 5 layer B in an embodiment of the present
invention. As illustrated in FIG. 4, assuming that nine wells are
distributed at the positions illustrated in FIG. 4 and they have a
certainty of 1 at each layer except those illustrated in FIGS. 2
and 3, then the distribution rule of the solution of 51 layer B1
can be obtained by interpolation in a minimum curvature method.
From the distribution diagram, the uncertainty distribution
situation of the solution of 51 layer B1 can be acquired, and the
positions of wells 2 and 5 with higher uncertainties can be quickly
determined. When the number of wells in the studied region is
large, and the layer division is ambiguous, the function of the
distribution diagram is especially useful.
[0085] FIG. 5 is a schematic diagram of a contour map of certainty
in solution 2 of 5 layer B in an embodiment of the present
invention. The uncertainty distribution situation of the solution
of 52 layer B2 is also given by the schematic diagram of the
certainty contour map in solution 2 of 5 layer B in FIG. 5.
Generally, the uncertainties of layered solutions associated with
each other in different wells also tend to be uniform. Thus if
merely the most possible solution of 5 layer B is considered, an
interpolation may be made to the schematic diagram of a horizontal
distribution by taking the maximum value of the certainty of 5
layer B.
[0086] FIG. 6 is a histogram of distribution of average certainty
of each layer in an embodiment of the present invention. In FIG. 6,
by calculating the average certainty of each layer in all the
wells, the uncertainty of each layer can be intuitively presented,
and a most possible layered solution may be screened out from
uncertain layered solutions. The embodiments of the present
invention further provide a stratigraphic correlation apparatus
based on uncertainty. As illustrated in FIG. 7, the stratigraphic
correlation apparatus comprises: a position determination unit 701,
an assignment unit 702 and a display unit 703.
[0087] In the stratigraphic correlation process, the position
determination unit 701 is configured to determine a plurality of
possible correlation positions in a well with uncertain layered
position in a profile;
[0088] The assignment unit 702 is configured to assign a
qualitative or quantitative certainty value to the plurality of
correlation positions.
[0089] The display unit 703 is configured to store and display the
plurality of correlation positions and certainty values thereof as
different layered solutions on the profile, respectively. In one
embodiment, when other profile passes through the well, the display
unit 703 is further configured to display the correlation position
and the certainty value of the well in the current profile,
respectively.
[0090] In one embodiment, as illustrated in FIG. 8, the
stratigraphic correlation apparatus further comprises: a
modification unit 801 and a solution addition unit 802. The
modification unit 801 is configured to modify the certainty value
of the layered solution according to the correlation result of the
current profile; and the solution addition unit 802 is configured
to add a new layered solution according to the correlation result
of the current profile and determine a certainty value thereof.
[0091] In one embodiment, as illustrated in FIG. 9, the
stratigraphic correlation apparatus further comprises: a first
interpolation unit 901. After the stratigraphic correlations of all
the wells are completed, the first interpolation unit 901 may
obtain a certainty contour map by interpolation according to the
certainty value of each layered solution at the well points.
[0092] In one embodiment, as illustrated in FIG. 10, the
stratigraphic correlation apparatus further comprises a second
interpolation unit 1001. After the stratigraphic correlations of
all the wells are completed, the second interpolation unit 1001 may
obtain the most possible certainty contour map for each layer by
interpolation according to a layered solution corresponding to a
maximum certainty value of the layer.
[0093] In one embodiment, as illustrated in FIG. 11, the
stratigraphic correlation apparatus further comprises a counting
unit 1101. After all the wells are closed, the counting unit 1101
counts an average certainty value of all the wells in each layered
solution or an average maximum certainty value of all the wells in
each layer.
[0094] The embodiments of the present invention further provide a
computer readable storage medium containing computer readable
instructions which when being executed, cause a processor to at
least:
[0095] determine a plurality of possible correlation positions in a
well with uncertain layered position in a profile, in a
stratigraphic correlation process;
[0096] assign a qualitative or quantitative certainty value to the
plurality of correlation positions; and
[0097] store and display the plurality of correlation positions and
certainty values thereof as different layered solutions on the
profile, respectively.
[0098] In one embodiment, the computer readable instructions
further cause the processor to display the correlation position and
the certainty value of the well in the current profile,
respectively, when other profile passes through the well.
[0099] In one embodiment, the computer readable instructions
further cause the processor to modify the certainty value of the
layered solution according to a correlation result of the current
profile.
[0100] In one embodiment, the computer readable instructions
further cause the processor to add a new layered solution according
to a correlation result of the current profile and determine a
certainty value thereof.
[0101] In one embodiment, after stratigraphic correlations of all
wells are completed, the computer readable instructions further
cause the processor to obtain a certainty contour map by
interpolation according to a certainty value of each layered
solution at well points.
[0102] In one embodiment, after stratigraphic correlations of all
wells are completed, the computer readable instructions further
cause the processor to obtain a most possible certainty contour map
for each layer by interpolation according to a layered solution
corresponding to a maximum certainty value of the layer.
[0103] In one embodiment, after all wells are closed, the computer
readable instructions further cause the processor to count an
average certainty value of all wells in each layered solution or an
average maximum certainty value of all wells in each layer.
[0104] The embodiments of the present invention further provide a
device 1200, as illustrated in FIG. 12, comprising:
[0105] a processor 1201; and
[0106] a memory 1202 containing computer readable instructions
which when being executed, cause the processor to:
[0107] determine a plurality of possible correlation positions in a
well with uncertain layered position in a profile, in a
stratigraphic correlation process;
[0108] assign a qualitative or quantitative certainty value to the
plurality of correlation positions; and
[0109] store and display the plurality of correlation positions and
certainty values thereof as different layered solutions on the
profile, respectively.
[0110] In one embodiment, the computer readable instructions
further cause the processor to display the correlation position and
the certainty value of the well in the current profile,
respectively, when other profile passes through the well.
[0111] In one embodiment, the computer readable instructions
further cause the processor to modify the certainty value of the
layered solution according to a correlation result of the current
profile.
[0112] In one embodiment, the computer readable instructions
further cause the processor to add a new layered solution according
to a correlation result of the current profile and determine a
certainty value thereof.
[0113] In one embodiment, after stratigraphic correlations of all
wells are completed, the computer readable instructions further
cause the processor to obtain a certainty contour map by
interpolation according to a certainty value of each layered
solution at well points.
[0114] In one embodiment, after stratigraphic correlations of all
wells are completed, the computer readable instructions further
cause the processor to obtain a most possible certainty contour map
for each layer by interpolation according to a layered solution
corresponding to a maximum certainty value of the layer.
[0115] In one embodiment, after all wells are closed, the computer
readable instructions further cause the processor to count an
average certainty value of all wells in each layered solution or an
average maximum certainty value of all wells in each layer.
[0116] The embodiments of the present invention have the following
beneficial effects:
[0117] (1) By setting a plurality of position solutions for a
layer, all possibilities of the layered position judged by the
geological personnel can be recorded as references for the
subsequent correlation of other profiles, the closing of the whole
layered solution, and the quality control.
[0118] (2) By setting an accuracy for each position solution, the
possibility of each solution can be determined and recorded,
thereby further facilitating the subsequent correlation of profiles
and the quality control of the whole layered solution.
[0119] (3) By making a certainty contour map for each layer, a well
with a higher uncertainty can be quickly found in the process of
the layer correlation, so that the closing and the quality control
are more targeted, and the closing efficiency is greatly
improved.
[0120] (4) By recording certainty data in the layering process, a
data basis can be provided for the final uncertainty analysis, thus
it is possible to quantize the uncertainty in the stratigraphic
correlation, which solves the problem that the stratigraphic
correlation uncertainty is difficult to be quantized.
[0121] (5) By implementation of the method of the invention, the
workload of closing and quality control at the later stage can be
greatly reduced while the workload in the layering process at the
earlier stage is slightly increased. In addition, the layering
result is more accurate and reliable, and the working efficiency is
improved.
[0122] A person skilled in the art shall appreciate that the
embodiments of the present invention may be provided as a method, a
system, or a computer program product. Thus the present invention
may adopt the form of complete hardware embodiment, complete
software embodiment, or software and hardware combined embodiment.
In addition, the present invention may adopt the form of a computer
program product which is implementable in one or more computer
readable storage mediums (including, but not limited to, magnetic
disk memory, CD-ROM, optical memory, etc.) containing computer
readable program codes therein.
[0123] The present invention is described with reference to the
flowcharts and/or block diagrams of the method, device (system) and
computer program product according to the embodiments of the
present invention. It shall be appreciated that each flow and/or
block in the flowchart and/or block diagram, and the combinations
of the flows and/or blocks in the flowchart and/or block diagram
can be implemented through computer program instructions. The
computer program instructions may be provided to a general
computer, a dedicated computer, an embedded processor or a
processor of other programmable data processing device, to form a
machine so that the instructions, which are executed through the
computer or the processor of other programmable data processing
device, generate means for realizing the functions specified in one
or more flows in the flowchart and one or more blocks in the block
diagram.
[0124] The computer program instructions may also be stored in a
computer readable memory which is capable of guiding the computer
or other programmable data processing device to work in a specific
mode, so that the instructions stored in the computer readable
memory generate a product including instructing means for realizing
the functions specified in one or more flows in the flowchart and
one or more blocks in the block diagram.
[0125] The computer program instructions may also be loaded to the
computer or other programmable data processing device, so that a
series of operation steps can be performed in the computer or other
programmable device to generate a processing realized by the
computer, thus the instructions executed in the computer or other
programmable device provide the steps for realizing the functions
specified in one or more flows in the flowchart and one or more
blocks in the block diagram.
[0126] The principle and embodiments of the present invention are
described through the specific embodiments, but the above
descriptions of the embodiments just promote the understanding of
the method and the core idea of the present invention. Meanwhile, a
person skilled in the art can modify the embodiments and the
application range according to the idea of the present invention.
In summary, the content of the Specification shall not be
understood as limitations to the present invention.
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