CN110910267A - Method and device for determining marine carbonate rock interlayer - Google Patents
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Abstract
The invention discloses a method and a device for determining a marine carbonate rock interlayer, wherein the method comprises the following steps: obtaining core slice data and well logging calibration depth of a marine carbonate rock coring section core, wherein the core slice data comprises: coring section depth data; determining logging response marks of different types of interlayer according to the core slice data and the logging calibration depth, wherein the logging response marks comprise: logging data, logging curve form and rotation position; identifying the interlayer of the whole well section according to the logging response marks of the interlayer of different types; determining the effectiveness of each compartment based on the compartment and the permeability within a predetermined range of the compartment, and developing dynamic data, the developing dynamic data including at least one of: the power module stratum test data, the production logging test data and the water injection effect data. The method can effectively identify the interlayer of the marine carbonate rock.
Description
Technical Field
The invention relates to the field of oil field development geology, in particular to a method and a device for determining a marine carbonate rock interlayer.
Background
The interlayer is a layered geologic body with low development permeability in a thick reservoir, is an important factor for influencing the flow of fluid in the reservoir, and the type and distribution characteristics of the interlayer have important influence on determining an oil reservoir development mode, a well completion scheme, a water injection mode, residual oil distribution and the like.
At present, the identification technology for the interlayer mainly aims at the clastic rock interlayer, the marine carbonate rock and the clastic rock have obvious differences in the aspects of a deposition system, rock physical properties and post-formation rock modification, and the existing identification technology for the clastic rock interlayer is not suitable for distribution prediction of the marine carbonate rock interlayer.
That is, there is currently no modeling and reliable process flow for identification and distribution prediction of marine carbonate interbedders.
Disclosure of Invention
In view of the above, the present invention provides a method and an apparatus for determining a marine carbonate interbed, so as to solve the above-mentioned problem of lack of identification of marine carbonate interbed.
According to a first aspect of the present invention there is provided a method of determining a marine carbonate compartment, the method comprising: obtaining core slice data and well logging calibration depth of a marine carbonate coring section core, wherein the core slice data comprises: coring section depth data; determining logging response marks of different types of interlayer layers according to the core slice data and the logging calibration depth, wherein the logging response marks comprise: logging data, logging curve form and rotation position; identifying the interlayer of the whole well section according to the logging response marks of the different types of interlayers; determining the effectiveness of each compartment based on the compartment and the permeability within a predetermined range of the compartment, and development dynamic data, the development dynamic data including at least one of: the power module stratum test data, the production logging test data and the water injection effect data.
According to a second aspect of the present invention there is provided a device for determining a marine carbonate compartment, the device comprising: the data acquisition unit is used for acquiring core slice data and logging calibration depth of a marine carbonate coring section core, wherein the core slice data comprises: coring section depth data; and the well logging response mark determining unit is used for determining well logging response marks of different types of interlayer layers according to the core slice data and the well logging calibration depth, and the well logging response marks comprise: logging data, logging curve form and rotation position; the whole well section interlayer identification unit is used for identifying the interlayer of the whole well section according to the logging response marks of the different types of interlayers; an effectiveness determination unit for determining the effectiveness of each compartment based on the compartment segment and the permeability within a predetermined range of the compartment, and development dynamic data, the development dynamic data comprising at least one of: the power module stratum test data, the production logging test data and the water injection effect data.
According to a third aspect of the present invention, there is provided an electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, the processor implementing the steps of the method for determining marine carbonate septal layers described above when executing the program.
According to a fourth aspect of the invention, the invention provides a computer-readable storage medium having stored thereon a computer program which, when being executed by a processor, carries out the steps of the above-mentioned method for determining a marine carbonate compartment.
According to the technical scheme, the logging response marks of different types of interlayer are determined according to the obtained core slice data of the marine carbonate rock coring section core, then the interlayer of the whole well section is identified based on the logging response marks of the different types of interlayer, and then the effectiveness of each interlayer is determined according to the interlayer section, the permeability in the preset range of the interlayer and the development dynamic data, so that the marine carbonate rock interlayer and the type thereof can be identified, the effectiveness of the interlayer is analyzed, and guidance is provided for fine development of an oil field.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a flow chart of a method of determining a marine carbonate compartment according to an embodiment of the invention;
FIG. 2 is a schematic illustration of rocks corresponding to different types of interlayers deposited at different stages of the sequence;
FIG. 3 is a schematic illustration of a log response signature for a carbonaceous mudstone compartment according to an embodiment of the invention;
FIG. 4 is an illustration of an example marine carbonate interbed identification according to an embodiment of the present invention;
FIG. 5 is a schematic plan view of a spacer layer generated based on the 4 spacer layer combinations identified in FIG. 4;
fig. 6 is a block diagram showing the structure of a marine carbonate interbed determination apparatus according to an embodiment of the present invention;
fig. 7 is a detailed structural block diagram of a determination device of a marine carbonate interbed according to an embodiment of the present invention;
fig. 8 is a block diagram of the structure of the validity determination unit 74 according to the embodiment of the present invention;
FIG. 9 is a schematic diagram of an electronic device according to an embodiment of the invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the process of implementing the embodiment of the present invention, the inventor finds the development and research of the prior art as follows:
currently, the following methods exist for the identification and distribution prediction of interlayer:
1. for a sandstone reservoir partition, interlayer and residual oil distribution identification scheme, the method mainly aims at the development current situations that the output is gradually reduced and accelerated after the 14a high-efficiency development of a Zhou city oil field enters an extra-high water-cut development period, the flooding in a thick oil reservoir layer is uneven and the underground oil and water distribution is complex, fully utilizes oil reservoir dense well pattern data and rich dynamic monitoring data, carries out step-by-step subdivision comparison research on the reservoir layer, and establishes a stack section interlayer and interlayer identification standard; through the fine sand body plane of the small layer and the flow unit and the vertical rock electricity comparison, 2 stable interlayer layers are found out, and one section of bottom block sandstone in the stack is subdivided into 3 subsections.
2. Regarding the interlayer interwell prediction scheme, the scheme specifically includes: acquiring a plurality of first drilling points of the horizontal well when the horizontal well drilling meets the first interlayer according to a logging curve of the horizontal well; acquiring a first inclination judgment value according to the first drilling points; acquiring a second drilling contact point of the pilot hole drilling contact second interlayer according to the logging curve of the pilot hole; acquiring a second inclination angle judgment value according to the second drilling meeting point and any one of the first drilling meeting points; and judging whether the first interlayer and the second interlayer are the same interlayer or not according to a first preset rule based on the first inclination judgment value and the second inclination judgment value. According to the scheme, inter-well prediction of the interlayer in the control range of the horizontal well can be realized, the research on the distribution rule of the interlayer is guided, and a geological basis is provided for the excavation and the submergence of residual oil and the development and adjustment of an oil reservoir.
3. An explanation about a marine clastic horizontal well interbed logging scheme includes: determining the type of the marine facies clastic rock vertical well interlayer and lithology characteristics corresponding to each type of vertical well interlayer; acquiring the vertical well logging response characteristic values of various types of vertical well interlayer of the core well in the research area, and determining the vertical well logging response lower limit standard of different types of vertical well interlayer; acquiring a natural gamma curve and a sound wave time difference curve of a horizontal well in a research area, and determining the position of a well track of the horizontal well in the research area in a marine facies clastic rock oil reservoir by combining a vertical well stratum dividing result of the research area; determining the type of the horizontal well interlayer of the marine clastic rock and the range of each type of horizontal well interlayer; determining the detection range of the resistivity curve at two sides of the well track of the horizontal well, and identifying the space position of the horizontal well interlayer according to the relative variation of the depth and the shallow resistivity of the horizontal well interlayer and the resistivity of an oil layer.
However, the above-mentioned identification technology for the interlayer mainly aims at the marine clastic rock interlayer, and marine carbonate rock and marine clastic rock have obvious differences in terms of a sedimentation system, rock physical properties and post-formation rock modification, and the development laws of the marine carbonate rock interlayer are obviously different, so that the prior art is not suitable for identification of the marine carbonate rock interlayer.
At present, a technology for identifying a marine carbonate interlayer is urgently needed, and based on the technology, the embodiment of the invention provides a determining scheme of the marine carbonate interlayer, which is suitable for identifying the marine carbonate interlayer and can provide guidance for fine development of an oil field.
Fig. 1 is a flow chart of a method for determining a marine carbonate interbed according to an embodiment of the present invention, as shown in fig. 1, the method includes steps 101-104, wherein:
According to the comparison between the core gamma curve form in the core slice data and the logging gamma curve form, the core depth can be matched with the logging depth, and therefore the logging calibration depth of the coring section can be obtained.
Optionally, morphological comparison can be performed according to the porosity development value in the core slice data and the porosity coring explained by logging, and the core depth is matched to the logging depth, so that the logging calibration depth of the coring section is obtained.
102, determining logging response marks of different types of interlayer layers according to the core slice data and the logging calibration depth, wherein the logging response marks comprise: logging data, log profile morphology and rotation position.
Specifically, firstly, identifying the rock type and the deposition environment of the interlayer according to the core slice data; and then determining the logging response marks of different types of interlayer layers according to the rock types of the interlayer layers and the logging calibration depth.
Wherein, the rock types specifically include: marlite, granular marlite, argillaceous marlite, carbonaceous mudstone; the deposition environment specifically includes: low energy environment under tide, marsh coal deposition environment, etc.
In actual operation, different rock types are deposited in different environments, for example, marlite, granitic limestone and argillaceous marlite are deposited in low-energy environments under tide, and the water body is deep; the argillaceous crystal limestone and carbonaceous mudstone are deposited in the swamp coal environment.
The well log data may include: natural Gamma-Ray-Natural Radioactivity (GR), acoustic moveout (AC), Density (DEN), Deep lateral resistivity (LLD), Shallow lateral resistivity (LLS), porosity and permeability values for conventional well log interpretation.
In actual operation, the deposition environment of the interlayer can be further judged based on the logging data, for example, the interlayer in a low-energy environment under the tide is high GR, high resistivity, high density and low acoustic wave time difference; lagoon-bog coal environment interlayers appear to be exceptionally high in GR (e.g., greater than 50 API).
And 103, identifying the interlayer of the whole well section according to the logging response marks of the different types of interlayers.
In one embodiment, after identifying the interbed layer of the whole well section, interbed layer plane distribution information may be further generated according to the interbed layer of the whole well section, where the interbed layer plane distribution information includes: information on combinations of different types of interlayer layers. This information may be represented graphically, for example, as a compartment plane map, from which compartments may be more visually displayed.
The combination of different types of interlayer layers means that for the important layer of the reservoir unit segmentation, the marine carbonate interlayer can be developed at the top of the lower reservoir unit or at the bottom of the upper reservoir unit, one type of interlayer layer or two types of interlayer layer combination can be used for the segmentation, and the description of the interlayer layer combination is beneficial to the subsequent evaluation of the effectiveness of the interlayer layer.
In another embodiment, after identifying the whole-well-section interlayer, the whole-well-section interlayer can be subjected to a zone well-connecting operation according to a preset type of interlayer, and then a zone interlayer and a local interlayer are determined from the whole-well-section interlayer according to the result of the zone well-connecting operation.
Specifically, key wells are selected in the oil field range to perform regional well-connecting comparison operation, a regional well-connecting comparison map is generated, and regional isolation layers and local isolation layers which develop in the oil field range can be determined based on the regional well-connecting comparison map.
The regional interlayer is related to a sea invasion system domain with a layer sequence rotating, has better contrast on the region and can be used as a mark layer; the development of the local interlayer is related to the local microfacies type and the micro landform characteristics, and can be in interlayer development in parallel areas or in oblique relation.
In one embodiment, based on the generated area well-tie comparison map, the interlayer combination type is determined around the key layer, and then the plane distribution of different interlayer combination types can be determined by using the well point identification result.
According to the embodiment of the invention, the core slice data and the logging calibration depth of the core of the marine carbonate rock coring section are firstly obtained, the logging response marks of different types of interlayer are determined according to the core slice data and the logging calibration depth, then the interlayers of the whole well section are identified based on the logging response marks of the different types of interlayer, and the effectiveness of each interlayer is determined according to the interlayer section, the permeability within the preset range of the interlayer and the development dynamic data, so that the marine carbonate rock interlayers and the types thereof can be identified, the effectiveness of the interlayers is analyzed, and guidance is provided for the fine development of an oil field.
In practice, the determining the effectiveness of the interlayer of step 104 includes: dividing each interlayer into different areas according to the interlayer section and the permeability in the preset range of the interlayer, wherein the different areas comprise: reliable, suspect and undeveloped regions; determining the effectiveness of the septa in the different regions based on the developed dynamic data.
Determining the effectiveness of the interlayers in the different regions according to the developed dynamic data specifically comprises: (1) acquiring pressure drop difference data of the interlayer in the different areas according to the power module stratum test (MDT) data; and determining the effectiveness of the interlayer in the reliable region and the in-doubt region according to the pressure drop difference data. (2) Acquiring water production data above and below the interlayer in the different areas according to the Production Logging Test (PLT) data; determining the effectiveness of the interlayers in the reliable and undeveloped regions based on the water production data. And (3) acquiring water injection effect data of the interlayer in different areas in different water injection modes; and determining the effectiveness of the interlayer in the different areas according to the water injection effect data.
In a specific implementation, the determination of the effectiveness of the interlayer in step 104 can be divided into static determination (hereinafter referred to as static evaluation) and dynamic determination (hereinafter referred to as dynamic evaluation).
Wherein the static evaluation comprises: (1) carrying out slicing analysis processing on the seismic wave impedance inversion body aiming at the position of the interlayer, and evaluating the development condition of the pore of the interlayer section according to the slicing processing result; (2) selecting, for example, 10 meters above and 10 meters below the interlayer, performing weighted average mapping on the permeability values of the well point data, describing planar permeability planar distribution, and dividing the planar distribution of the interlayer into a reliable area, a suspicious area and an undeveloped area.
The dynamic evaluation refers to fully applying MDT data, PLT data, water injection effect and other development dynamic data to evaluate the effectiveness of the interlayer according to the static evaluation result of the interlayer, particularly verifying the suspected region and the undeveloped region to improve the reliability of interlayer distribution portrayal and provide guidance for reservoir unit division, water injection scheme optimization and residual oil distribution prediction.
For better understanding of the embodiment of the present invention, the following describes in detail the process for determining the marine carbonate interbed according to the embodiment of the present invention based on the group M of the H oil field, specifically including the following steps:
step 1: and identifying the rock type and the deposition environment of the interlayer according to the rock core and slice data.
Specifically, from 1032 m core observation, identifying the type of rock that can act as a spacer includes: marlite, argillaceous marlite, granular marlite, carbonaceous mudstone. The porosity of the rock types is less than 8%, the permeability is less than 2mD, and the permeability is obviously lower than that of the reservoir section.
Fig. 2 is a schematic diagram of rocks corresponding to different types of interlayers (or referred to as barriers) shown in table 1 below deposited in different sequence stages, as shown in fig. 2, the interlayer type is ① low-energy marlite under tide, the corresponding rock types are marlite, argillaceous crystal limestone and granular marlite, deposited in low-energy environment under tide, located in a sea invasion system area and a lower part of high-frequency back-rotation (or referred to as a bottom), the interlayer type is ② marsh-phase coal-containing marlite, the corresponding rock type is carbonaceous marlite deposited in a marsh coal-forming environment, located in a high water level system area and an upper part of high-frequency back-rotation (or referred to as a top), the interlayer type is ③ under cut grain filling marlite, the corresponding rock type is argillaceous crystal limestone, filled in the under cut grain (or sea invasion), formed in a low-level system of upper sequence, and cut a high-energy beach system of lower layer.
TABLE 1
Step 2: and determining a interlayer logging response mark based on the core of the coring section and the logging calibration depth.
On the basis of observing and identifying the lithology of the interlayer by the core, the core taking section is firstly reset, the core depth can be matched with the logging depth, the logging calibration depth of the core taking section is obtained, and therefore the interlayer logging response mark can be determined. Fig. 3 is a schematic diagram of a log response signature for a carbonaceous mudstone compartment, as shown in fig. 3, showing the log response signature for carbonaceous mudstone compartments of different depths and different formations.
Specifically, table 2 shows partial log response signatures for different types of spacers, as shown in table 2:
TABLE 2
And step 3: and carrying out well connection comparison operation on the interlayer region.
Firstly, according to the interlayer logging response mark, the interlayer and the type are identified in the whole well section.
In one embodiment, the regional comparison is performed by using a thick layer of low-energy marlite interlayers under tide as the marker layer, as shown in fig. 4, a plurality of sets of regional low-energy marlite interlayers (shown as MB1-1, MC1-1, MC2-1 and MC1-1) under tide are identified together, and have good transverse continuity and can be used as regional interlayers; the interlayer layers all belong to a sea invasion system area of a sequence stratum and divide and develop a storage layer section of a high water level system area.
Furthermore, at least 2 sets of Swamp-phase carbonaceous mudstone interlayers (Swamp Barrier) can be identified in the reservoir section of the high water system area among the regional interlayers, the transverse thickness of the Swamp-phase carbonaceous mudstone interlayers is greatly changed, the distribution is less continuous, and a local interlayer is formed.
Further, a plurality of under-cut-valley-argillaceous-limestone partition interlayers (inclusion barriers) are identified inside the reservoir section of the high-water-level system region, and the reservoir section is transversely segmented.
And selecting key wells in the oil field range to perform regional well-connecting comparison operation, generating a regional well-connecting comparison map, and determining a regional interlayer and a local interlayer which develop in the oil field range based on the regional well-connecting comparison map.
In the specific implementation process, different deposition environments for rock type development determine different development rules of marine carbonate rock interlayers, and the development water bodies of marlite, granular marlite and marlite containing marlite deposited in low-energy environments under tide are larger and have better transverse continuity, so that the marlite can be used as an area interlayer; the sedimentary water bodies of the mud-containing argillaceous crystal limestone and the carbonaceous mudstone sedimentated in the marsh coal environment are shallow, large in transverse change and poor in transverse continuity, and can be used as a local interlayer.
And 4, step 4: and generating the interlayer combination type plane distribution.
For an important layer of the reservoir unit segmentation, the marine carbonate interbed can be developed at the top of the lower reservoir unit or at the bottom of the upper reservoir unit, and one type of interbed or a combination of two types of interbed can be used for the segmentation.
Through the identification of the interlayer combination, the development and the combination characteristics of the upper interlayer and the lower interlayer of the interface can be simultaneously evaluated to determine the segmentation effect of the interlayer on the reservoir stratum, and the depiction of the interlayer combination is favorable for the subsequent evaluation of the effectiveness of the interlayer.
With continued reference to fig. 4, for the interlayer between MB2-1 and MB1-2, as in fig. 4, 4 interlayer combination types were identified, including: MB2-1 top carbonaceous mudstone (Swamp), MB1-2C bottom tide lower marl (Subtidal), MB2-1 top carbonaceous mudstone (Swamp) + MB1-2C bottom tide lower marl (Subtidal), and undercut grain marl (Incision).
Fig. 5 is a schematic plan view of a compartment layer generated based on the 4 compartment layer combinations identified in fig. 4 above, and as shown in fig. 5, the undercut muddy crystal limestone compartment layer has a distinct linear character in the compartment layer plan distribution and has no correlation with the surrounding reservoir formation.
And 5: the effectiveness of the interlayer was evaluated.
The interlayer effectiveness evaluation includes two aspects: static evaluation and dynamic evaluation.
Wherein the static evaluation comprises: (1) whether the permeability of the interlayer section on the well point is less than 3mD or not and whether the thickness of the interlayer section on the well point is more than 5 meters or not, and in actual operation, the permeability of the interlayer section on the well point is less than 3mD and the thickness of the interlayer section on the well point is more than 5 meters. (2) And (3) carrying out section analysis on the seismic wave impedance inversion body aiming at the position of the interlayer, and evaluating the development condition of the pore of the interlayer section. (3) Selecting a preset range of the interlayer (for example, 10 meters above and 10 meters below the interlayer), performing weighted average mapping on the permeability values of the well point data, describing planar permeability planar distribution, and dividing the planar distribution of the interlayer into a reliable area, a suspicious area and an undeveloped area.
The dynamic evaluation refers to fully applying MDT data, PLT data, water injection effect and other development dynamic data to evaluate the effectiveness of the interlayer according to the static evaluation result of the interlayer, and particularly verifying the suspected region and the undeveloped region so as to improve the reliability of the distribution depiction of the interlayer.
Wherein, according to the MDT data, the reliable area of the interlayer should have obvious pressure drop difference, which represents two pressure systems. Well points with no significant MDT drawdown difference can be listed as suspect zones and will not be listed as barrier undeveloped zones in actual operation.
The PLT data is used for judging the effectiveness of the interlayer near the oil-water interface, the water yield of the reservoir section below the interlayer of the interlayer reliable area can obviously increase along with the increase of the production pressure difference, and the production of the reservoir section above the interlayer section is slightly influenced.
The water injection effect is mainly characterized in that the distribution conditions of the affected well and the affected layer section are observed by selecting a water injection mode, and the effectiveness of the interlayer is judged.
According to the marine carbonate rock interlayer determining scheme provided by the embodiment of the invention, on the basis of subdividing the rock types and the deposition environments of the interlayer, the logging response identification mark of the interlayer is established, and the development and the combination characteristics of the upper interlayer and the lower interlayer of the interface are simultaneously evaluated through the combined distribution of the interlayers to determine the segmentation effect of the interlayer on the reservoir layer, so that the reliability of the distribution prediction and the effectiveness evaluation of the interlayers is improved, and scientific guidance is provided for the reliability of the reservoir unit division, the optimization of the water injection scheme and the prediction of the residual oil distribution in the development period of the oil field.
Based on similar inventive concepts, the embodiment of the invention also provides a device for determining the marine carbonate interbed, and the device is preferably used for realizing the method embodiment.
Fig. 6 is a block diagram showing the structure of an apparatus for determining a marine carbonate interbed according to an embodiment of the present invention, as shown in fig. 6, the apparatus including: a data acquisition unit 71, a logging response flag determination unit 72, a full interval compartment identification unit 73 and a validity determination unit 74, wherein:
the data acquisition unit 71 is configured to acquire core slice data and logging calibration depth of a marine carbonate coring section core, where the core slice data includes: coring section depth data;
a well logging response flag determining unit 72, configured to determine well logging response flags of different types of interlayers according to the core slice data and the well logging calibration depth, where the well logging response flags include: logging data, logging curve form and rotation position;
the whole well section interlayer identification unit 73 is used for identifying the interlayer of the whole well section according to the logging response marks of the different types of interlayers;
an effectiveness determination unit 74 for determining the effectiveness of each compartment based on the compartment interval and the permeability within a predetermined range of the compartment, and development dynamic data, the development dynamic data comprising at least one of: the power module stratum test data, the production logging test data and the water injection effect data.
According to the embodiment of the invention, firstly, the data acquisition unit 71 is used for acquiring the core slice data and the logging calibration depth of the marine carbonate coring section core, the logging response mark determination unit 72 is used for determining the logging response marks of different types of interlayer layers according to the core slice data and the logging calibration depth, then the whole well section interlayer recognition unit 73 is used for recognizing the interlayer layers of the whole well section according to the logging response marks of the different types of interlayer layers, and then the effectiveness determination unit 74 is used for determining the effectiveness of each interlayer layer according to the interlayer layer, the permeability in the preset range of the interlayer layer and the development dynamic data.
Specifically, the logging response flag determining unit 72 includes: lithology identification module and log response mark confirm module, wherein:
the lithology recognition module is used for recognizing the rock type of the interlayer according to the rock core slice data;
and the well logging response mark determining module is used for determining the well logging response marks of different types of interlayer according to the rock types of the interlayer and the well logging calibration depth.
In one embodiment, as shown in fig. 7, the above apparatus further comprises: a zone-well-tie operation unit 75 and a compartment classification determination unit 76, wherein:
a zonal well-connecting operation unit 75 for performing zonal well-connecting operation on the interbed of the whole well section according to a predetermined type of interbed;
and the interlayer classification determining unit 76 is used for determining a regional interlayer and a local interlayer from the interlayers of the whole well section according to the regional well-connecting operation result. The result of the zone well-tie operation can be a zone well-tie contrast map.
The predetermined type of interlayer may be, for example, a thick layer sub-tidal low energy marlite interlayer. In the specific implementation process, the regional interconnected well comparison operation can be carried out by taking the low-energy marlite interlayer under the thick-layer tide as a mark layer, a regional interconnected well comparison map is generated, and the regional interlayer and the local interlayer which develop in the oil field range can be determined based on the regional interconnected well comparison map.
With continued reference to fig. 7, the apparatus further comprises: an interlayer plane distribution information generating unit 77, configured to generate interlayer plane distribution information according to an interlayer of the whole wellbore interval, where the interlayer plane distribution information includes: information on combinations of different types of interlayer layers.
The combination of different types of interlayer layers means that for the important layer of the reservoir unit segmentation, the marine carbonate interlayer can be developed at the top of the lower reservoir unit or at the bottom of the upper reservoir unit, one type of interlayer layer or two types of interlayer layer combination can be used for the segmentation, and the description of the interlayer layer combination is beneficial to the subsequent evaluation of the effectiveness of the interlayer layer.
In one embodiment, based on the generated area well-tie comparison map, the interlayer combination type is determined around the key layer, and then the plane distribution of different interlayer combination types can be determined by using the well point identification result.
With continued reference to fig. 7, in an implementation, the apparatus further includes: a section analysis processing unit 78 and a pore development evaluation unit 79, wherein:
the slice analysis processing unit 78 is used for carrying out slice analysis processing on the seismic wave impedance inversion body according to the position information of the interlayer;
and the pore development condition evaluation unit 79 is used for evaluating the pore development condition of the interlayer section according to the slice analysis processing result.
The effectiveness of the spacer layer can be evaluated by the section analysis processing unit 78 and the pore development evaluation unit 79.
Specifically, as shown in fig. 8, the validity determination unit 74 includes: a region partitioning module 741 and a validity determination module 742, wherein:
a region dividing module 741, configured to divide the interlayer plane into different regions according to the interlayer segment and the permeability within the predetermined range of the interlayer, where the different regions include: reliable, in-doubt and undeveloped regions.
An effectiveness determination module 742 is configured to determine effectiveness of the interlayer in the different regions according to the development dynamic data. The validity determining module 742 specifically includes: a first validity determination submodule 7421, a second validity determination submodule 7422 and a third validity determination submodule 7423, wherein:
a first validity determination submodule 7421, configured to obtain pressure drop difference data of the interlayers in the different regions according to the MDT data, and determine validity of the interlayers in the reliable region and the in-doubt region according to the pressure drop difference data;
a second validity determination submodule 7422, configured to obtain water yield data above and below the interlayers in the different regions according to the PLT data, and determine the validity of the interlayers in the reliable region and the undeveloped region according to the water yield data.
And a third validity determination submodule 7423 configured to obtain water injection effect data of the interlayers in the different regions in different water injection modes, and determine the validity of the interlayers in the different regions according to the water injection effect data.
Through the first validity determination sub-module 7421, the second validity determination sub-module 7422 and the third validity determination sub-module 7423, validity evaluations may be performed on different areas of the partitioned interlayer, particularly verification of suspect areas and undeveloped areas, to improve reliability of interlayer distribution characterization.
For specific implementation processes of the units, the modules, and the sub-modules, reference may be made to the description of the method embodiment, and details are not described here.
In a specific implementation process, the units, the modules, and the sub-modules may be arranged singly or in combination, and the present invention is not limited thereto.
FIG. 9 is a schematic diagram of an electronic device according to an embodiment of the invention. The electronic device shown in fig. 9 is a general-purpose data processing apparatus comprising a general-purpose computer hardware structure including at least a processor 1001 and a memory 1002. The processor 1001 and the memory 1002 are connected by a bus 1003. The memory 1002 is adapted to store one or more instructions or programs that are executable by the processor 1001. The one or more instructions or programs are executed by processor 1001 to implement the steps in the above-described method of determining marine carbonate interbeds.
The processor 1001 may be an independent microprocessor or a set of one or more microprocessors. Thus, the processor 1001 implements the processing of data and the control of other devices by executing commands stored in the memory 1002 to thereby execute the method flows of the embodiments of the present invention as described above. The bus 1003 connects the above components together, and also connects the above components to a display controller 1004 and a display device and an input/output (I/O) device 1005. Input/output (I/O) devices 1005 may be a mouse, keyboard, modem, network interface, touch input device, motion sensing input device, printer, and other devices known in the art. Typically, input/output (I/O) devices 1005 are connected to the system through an input/output (I/O) controller 1006.
The memory 1002 may store, among other things, software components such as an operating system, communication modules, interaction modules, and application programs. Each of the modules and applications described above corresponds to a set of executable program instructions that perform one or more functions and methods described in embodiments of the invention.
Embodiments of the present invention further provide a computer-readable storage medium, on which a computer program is stored, which, when executed by a processor, implements the steps of the method for determining a marine carbonate compartment.
In summary, the embodiment of the application provides a determination scheme of a marine carbonate interlayer, a logging response identification mark of the interlayer is established on the basis of subdividing the rock type and the deposition environment of the interlayer, the concept of interlayer combination is innovatively provided, the reliability of interlayer distribution prediction and effectiveness evaluation is improved, and scientific guidance can be provided for the reliability of reservoir unit division, the optimization of a water injection scheme and the prediction of residual oil distribution in the development period of an oil field.
The preferred embodiments of the present invention have been described above with reference to the accompanying drawings. The many features and advantages of the embodiments are apparent from the detailed specification, and thus, it is intended by the appended claims to cover all such features and advantages of the embodiments which fall within the true spirit and scope thereof. Further, since numerous modifications and changes will readily occur to those skilled in the art, it is not desired to limit the embodiments of the invention to the exact construction and operation illustrated and described, and accordingly, all suitable modifications and equivalents may be resorted to, falling within the scope thereof.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
The principle and the implementation mode of the invention are explained by applying specific embodiments in the invention, and the description of the embodiments is only used for helping to understand the method and the core idea of the invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.
Claims (18)
1. A method of determining a marine carbonate compartment, the method comprising:
obtaining core slice data and well logging calibration depth of a marine carbonate coring section core, wherein the core slice data comprises: coring section depth data;
determining logging response marks of different types of interlayer layers according to the core slice data and the logging calibration depth, wherein the logging response marks comprise: logging data, logging curve form and rotation position;
identifying the interlayer of the whole well section according to the logging response marks of the different types of interlayers;
determining the effectiveness of each compartment based on the compartment and the permeability within a predetermined range of the compartment, and development dynamic data, the development dynamic data including at least one of: the power module stratum test data, the production logging test data and the water injection effect data.
2. The method for determining marine carbonate interbeds according to claim 1, wherein determining log response signatures for different types of interbeds based on the core slice data and log calibration depths comprises:
identifying the rock type of the interlayer according to the rock core slice data;
and determining the logging response marks of different types of interlayer layers according to the rock types of the interlayer layers and the logging calibration depth.
3. The method of determining marine carbonate interbeds according to claim 1, wherein after identifying interbeds for a full wellbore interval based on log response signatures of the different types of interbeds, the method further comprises:
generating interlayer plane distribution information according to the interlayer of the whole well section, wherein the interlayer plane distribution information comprises: information on combinations of different types of interlayer layers.
4. The method of determining marine carbonate interbeds according to claim 1, wherein after identifying interbeds for a full wellbore interval based on well log response signatures of the different types of interbeds, the method further comprises:
carrying out zone well connection operation on the interlayer of the whole well section according to a preset type of interlayer;
and determining a regional isolation layer and a local isolation layer from the isolation layers of the whole well section according to the regional well-connecting operation result.
5. The method of determining a marine carbonate compartment layer according to claim 1, further comprising:
carrying out slice analysis processing on the seismic wave impedance inversion body according to the position information of the interlayer;
and evaluating the development condition of the pore of the interlayer section according to the slice analysis and processing result.
6. The method of determining a marine carbonate interbay according to claim 1, wherein determining the effectiveness of each interbay based on the interbay section and permeability within a predetermined range of the interbay, and developing dynamic data comprises:
dividing each interlayer into different areas according to the interlayer segment and the permeability within a preset range of the interlayer, wherein the different areas comprise: reliable, suspect and undeveloped regions;
determining the effectiveness of the septa in the different regions based on the developed dynamic data.
7. The method of determining marine carbonate interbedding according to claim 6, wherein determining the effectiveness of the interbedding in the different regions based on the developed dynamic data comprises:
acquiring pressure drop difference data of the interlayers in different areas according to the stratum test data of the power module;
and determining the effectiveness of the interlayers in the reliable region and the in-doubt region according to the pressure drop difference data.
8. The method of determining marine carbonate interbedding according to claim 6, wherein determining the effectiveness of the interbedding in the different regions based on the developed dynamic data further comprises:
acquiring water yield data above and below the interlayer in different areas according to the production logging test data;
and determining the effectiveness of the septa in the reliable region and the undeveloped region according to the water yield data.
9. The method of determining marine carbonate interbedding according to claim 6, wherein determining the effectiveness of the interbedding in the different regions based on the developed dynamic data further comprises:
acquiring water injection effect data of the interlayer in different areas in different water injection modes;
and determining the effectiveness of the interlayer in different areas according to the water injection effect data.
10. An apparatus for determining a marine carbonate compartment, the apparatus comprising:
the data acquisition unit is used for acquiring core slice data and logging calibration depth of a marine carbonate coring section core, wherein the core slice data comprises: coring section depth data;
and the well logging response mark determining unit is used for determining well logging response marks of different types of interlayer layers according to the core slice data and the well logging calibration depth, and the well logging response marks comprise: logging data, logging curve form and rotation position;
the whole well section interlayer identification unit is used for identifying the interlayer of the whole well section according to the logging response marks of the different types of interlayers;
an effectiveness determination unit for determining the effectiveness of each compartment based on the compartment segment and the permeability within a predetermined range of the compartment, and development dynamic data, the development dynamic data comprising at least one of: the power module stratum test data, the production logging test data and the water injection effect data.
11. The marine carbonate compartment determination apparatus of claim 10, wherein the log response flag determination unit comprises:
the lithology recognition module is used for recognizing the rock type of the interlayer according to the rock core slice data;
and the well logging response mark determining module is used for determining the well logging response marks of different types of interlayer according to the rock types of the interlayer and the well logging calibration depth.
12. The marine carbonate compartment determination apparatus of claim 10, further comprising:
the interlayer plane distribution information generating unit is used for generating interlayer plane distribution information according to the interlayer of the whole well section, and the interlayer plane distribution information comprises: information on combinations of different types of interlayer layers.
13. The marine carbonate compartment determination apparatus of claim 10, further comprising:
the regional well-connecting operation unit is used for performing regional well-connecting operation on the interlayer of the whole well section according to a preset type of interlayer;
and the interlayer classification determining unit determines a region interlayer and a local interlayer from the interlayers of the whole well section according to the region well-connecting operation result.
14. The marine carbonate compartment determination apparatus of claim 10, further comprising:
the slicing analysis processing unit is used for carrying out slicing analysis processing on the seismic wave impedance inversion body according to the position information of the interlayer;
and the pore development condition evaluation unit is used for evaluating the pore development condition of the interlayer section according to the slice analysis processing result.
15. The marine carbonate compartment determination apparatus according to claim 10, wherein the validity determination unit includes:
the area dividing module is used for dividing each interlayer into different areas according to the interlayer sections and the permeability within a preset range of the interlayer, and the different areas comprise: reliable, suspect and undeveloped regions;
and the effectiveness determining module is used for determining the effectiveness of the interlayers in the different areas according to the developed dynamic data.
16. The marine carbonate compartment determination apparatus of claim 15, wherein the effectiveness determination module comprises:
the first effectiveness determining submodule is used for acquiring pressure drop difference data of the interlayers in the different areas according to the stratum test data of the power module and determining the effectiveness of the interlayers in the reliable area and the in-doubt area according to the pressure drop difference data;
the second effectiveness determining submodule is used for acquiring water yield data above and below the interlayers in the different areas according to the production logging test data and determining the effectiveness of the interlayers in the reliable areas and the undeveloped areas according to the water yield data;
and the third effectiveness determining submodule is used for acquiring water injection effect data of the interlayer in different areas in different water injection modes and determining the effectiveness of the interlayer in the different areas according to the water injection effect data.
17. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor when executing the program performs the steps of the method of determining a marine carbonate compartment layer according to any one of claims 1 to 9.
18. A computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out the steps of the method for determining a marine carbonate compartment as defined in any one of claims 1 to 9.
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