A method and device system for determining interwell reservoir architecture of a carbonate reservoir

Abstract

The present application relates to a kind of carbonate reservoir interwell reservoir configuration determination method and its device system, the determination method includes: (1) by single well sedimentary facies interpretation result and seismic inversion data, obtain sedimentary configuration interface;(2) according to sedimentary configuration interface, combine single well conventional logging curve and geologic facies interpretation result, obtain geologic facies configuration interface;(3) according to single well dynamic data analysis, obtain dynamic interference characteristics;(4) according to single well fluid production profile and water injection profile, obtain the development position of relative advantage seepage channel;(5) according to dynamic interference characteristics, combine geologic facies configuration interface, obtain reservoir configuration interface;(6) according to dynamic and static data, based on reservoir configuration interface, according to dynamic interference characteristics, obtain the division scheme of carbonate reservoir interwell reservoir configuration.The determination method provided by the present application fully considers a variety of dynamic and static data, meets the production demand of oilfield site.

Description

Technical Field

[0001] This invention relates to the field of oil reservoir development technology, and to a method for fine description of carbonate reservoirs, and more particularly to a method and apparatus system for determining the reservoir configuration between injection and production wells in carbonate reservoirs. Background Technology

[0002] Carbonate reservoirs are characterized by their large thickness and strong heterogeneity, which severely restricts the effectiveness of water injection development in this type of reservoir. Therefore, the study of sedimentary and reservoir configurations between injection and production wells is particularly important.

[0003] Currently, research on sedimentary and reservoir configurations is mainly applied to clastic rocks, with limited research on carbonate rocks. Furthermore, most studies on sedimentary and reservoir configurations are based on sedimentary bodies, conducting detailed studies on the configurational interfaces within large sedimentary bodies according to their sedimentary backgrounds and environments. Essentially, this still falls under the scope of sedimentary reservoir research. However, for layered or massive carbonate reservoirs, due to their large reservoir thickness and the small spacing between injection and production wells during actual development, multiple sedimentary bodies are often spanned both vertically and horizontally within the injection-production well group. With the large-scale implementation of water injection in this type of reservoir, current characterization of the internal configuration of a single sedimentary body is no longer sufficient to meet the technical requirements for the refined development of this type of reservoir.

[0004] Therefore, it is evident that providing a method for determining the reservoir configuration between injection and production wells in carbonate oil reservoirs, fully considering various dynamic and static data, meeting the production needs of the oilfield, and providing corresponding technical support for the formulation of water injection development plans for carbonate oil reservoirs and the improvement of development effects, has become an urgent problem that needs to be solved by those skilled in the art. Summary of the Invention

[0005] In view of the problems existing in the prior art, one of the objectives of the present invention is to provide a method and apparatus system for determining the reservoir configuration between injection and production wells in carbonate oil reservoirs. The determination method fully considers various dynamic and static data, meets the production needs of the oilfield, and provides corresponding technical support for the formulation of water injection development schemes for carbonate oil reservoirs and the improvement of development effects.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] In a first aspect, the present invention provides a method for determining the reservoir configuration between injection and production wells in carbonate oil reservoirs, the method comprising the following steps:

[0008] (1) The sedimentary facies and sedimentary microfacies division results were obtained by single-well sedimentary facies analysis. Combined with seismic inversion data, the sedimentary configuration interface between water injection wells and oil production wells was obtained.

[0009] (2) Based on the sedimentary configuration interface between the water injection well and the oil production well described in step (1), and combined with the conventional logging curves of a single well and the geological facies interpretation results, the geological facies configuration interface between the water injection well and the oil production well is obtained.

[0010] (3) Based on the analysis of single-well dynamic data, the dynamic interference characteristics between water injection wells and oil production wells are obtained;

[0011] (4) Based on the single well production profile and water absorption profile, the location of the relatively dominant seepage channels between the injection well and the production well is obtained.

[0012] (5) Based on the dynamic interference characteristics described in step (3) and the location of the development of the relatively dominant seepage channels described in step (4), combined with the geological facies interface described in step (2), the reservoir configuration interface between the injection well and the production well is obtained.

[0013] (6) Based on dynamic and static data, and taking the reservoir configuration interface described in step (5) as the basis, and taking the dynamic interference characteristics described in step (3) and the location of the relatively dominant seepage channels described in step (4) as the basis, a classification scheme for the reservoir configuration between injection and production wells in carbonate oil reservoirs is obtained.

[0014] The method for determining the reservoir configuration between injection and production wells in carbonate oil reservoirs provided by this invention, based on the original method of analyzing sedimentary and reservoir configurations using different types of sedimentary bodies, fully considers the relative positional relationship between injection and production wells and carries out the classification and evaluation of reservoir configurations between injection and production wells.

[0015] Furthermore, the proposed method fully considers dynamic and static data such as sedimentary background, diagenesis, logging characteristics, seismic inversion response characteristics, production dynamic response characteristics, and dynamic monitoring. Based on the delineation of sedimentary and geological facies interfaces between injection and production wells, it fully utilizes the dynamic characteristics and monitoring data of actual development wells to clarify the relationship between geological and reservoir facies. Based on this, a reservoir configuration delineation scheme between injection and production wells is determined. This method is more in line with the production needs of oilfields. Through the full integration of multiple disciplines and data, the resulting reservoir configuration delineation scheme between injection and production wells can more accurately characterize the longitudinal and lateral distribution characteristics of high-permeability layers, interlayers, and intercalations in this type of reservoir. The research results can provide corresponding technical support for the formulation of water injection development schemes for this type of reservoir and for improving development efficiency.

[0016] Preferably, the method for obtaining the sedimentary configuration interface between the injection well and the production well in step (1) includes:

[0017] Based on the results of single-well sedimentary facies research, the sedimentary facies and sedimentary microfacies classification results of oil production wells and water injection wells in the target strata were obtained.

[0018] Based on seismic inversion data, inversion methods and results that can represent the effective reservoir development characteristics are selected. Combined with the results of single-well sedimentary facies and sedimentary microfacies classification, the planar distribution characteristics of sedimentary microfacies and sedimentary configuration interfaces are obtained.

[0019] In this invention, the geological facies mentioned in step (2) refers to the later diagenetic modification of sedimentary microfacies determined by fully combining sedimentary background, porosity and permeability testing, core casting thin sections and mercury intrusion porosimetry data, based on the identification of single-well sedimentary microfacies. That is, the single-well geological facies determined by the combination of sedimentation and diagenesis. The division of geological facies can provide a geological basis for the division of reservoir configuration.

[0020] Preferably, the method for obtaining the dynamic interference characteristics between injection wells and production wells based on single-well dynamic data analysis in step (3) includes:

[0021] Based on the production dynamic data of single wells, the development dynamic monitoring time of water injection wells and oil production wells is correlated, and the dynamic interference characteristics between water injection wells and oil production wells are analyzed.

[0022] Preferably, the dynamic interference feature analysis includes:

[0023] For cases where oil wells are converted to water injection wells, the analysis focuses on the consistency of the dynamic characteristics of oil wells and water injection wells during the oil production stage before the conversion, under unchanged external conditions. Alternatively, it examines whether the corresponding oil wells or water injection wells exhibit response characteristics after changes in their external conditions. If a response is observed, it indicates the presence of dynamic interference characteristics between wells.

[0024] For wells that are put into production immediately as water injection wells and for wells that have been converted from oil production wells to water injection wells, we analyze whether the dynamic characteristics of the oil production wells have response characteristics after the water injection wells start injecting water. If there is a response, it indicates the existence of dynamic interference characteristics between wells.

[0025] Preferably, step (3) further includes dynamic interference characteristic analysis based on pressure monitoring data and dynamic interference characteristic analysis based on water quality analysis data.

[0026] Preferably, the method for analyzing dynamic interference characteristics based on pressure monitoring data includes monitoring the dynamic interference characteristics between oil production wells and water injection wells based on static pressure tests of a single well.

[0027] Preferably, in the case of converting an oil well into a water injection well, the consistency of the pressure systems of the oil well and the water injection well during the oil production stage before the conversion is analyzed. During the production process of the oil well and the water injection well, the trend of static pressure change is consistent. If they are consistent, it indicates that there are dynamic interference characteristics between the water injection well and the oil well.

[0028] Preferably, for cases where the well is put into production as a water injection well and for the stage after the oil well is converted into a water injection well, the static pressure and flowing pressure tests of the oil well after the water injection well starts to be analyzed to see if there is a response characteristic of formation pressure rebound or a slowdown in the decreasing trend compared to before water injection. If there is a corresponding characteristic, it indicates that there is a dynamic interference characteristic between the water injection well and the oil well.

[0029] Preferably, the method for analyzing dynamic interference characteristics based on water quality analysis data includes: when the carbonate reservoir is not very sensitive to the quality of injected water, by injecting water with different salinities, the salinity of the water between the oil wells is compared and analyzed. If the salinity of the oil wells and the injection wells is similar and significantly different from that of the formation water, it indicates that there are dynamic interference characteristics between the injection wells and the oil wells.

[0030] Preferably, the method for obtaining the location of the relatively dominant seepage channels between the injection well and the production well in step (4) includes:

[0031] Based on the production profile test results of the oil production well or water injection well during the oil production stage before water injection, determine the fluid supply of each fluid-producing section in the vertical direction of the reservoir.

[0032] Based on the water absorption profile of the injection well, determine the main water-absorbing layer and the amount of water absorbed by the injected water in the formation.

[0033] Based on the longitudinal distribution characteristics of the production profile of oil wells and the water absorption profile of injection wells, the dominant seepage channels and their development locations between injection wells and oil wells are identified.

[0034] Preferably, the method for obtaining the reservoir configuration interface between the injection well and the production well in step (5) includes:

[0035] Based on the dynamic response characteristics and the location of the relatively dominant seepage channels between water injection wells and oil production wells, and combined with the results of geological facies interface division, the geological facies seepage characteristics of single wells and between water injection wells and oil production wells are classified and analyzed. The geological facies and reservoir facies are correlated and analyzed to determine the reservoir configuration development interface between water injection wells and oil production wells.

[0036] Preferably, the method for obtaining the reservoir configuration division scheme between injection and production wells in carbonate oil reservoirs in step (6) includes:

[0037] Based on dynamic and static data, the correlation between reservoir geological facies and reservoir facies is determined, the reservoir configuration interface between water injection wells and oil production wells is further determined, and a reservoir configuration classification scheme for carbonate oil reservoirs is determined.

[0038] In a second aspect, the present invention provides an apparatus system for determining the reservoir configuration between injection and production wells in carbonate oil reservoirs, the apparatus system operating according to the determination method described in the first aspect, the apparatus system comprising:

[0039] Modules for obtaining the sedimentary configuration interface between water injection wells and oil production wells, the geological facies configuration interface between water injection wells and oil production wells, the dynamic interference characteristics between water injection wells and oil production wells, the location of the development of the relatively dominant seepage channels between water injection wells and oil production wells, the reservoir configuration interface between water injection wells and oil production wells, and the reservoir configuration division scheme between water injection and production wells in carbonate reservoirs.

[0040] The data output of the sedimentary configuration interface acquisition module between the water injection well and the oil production well is connected to the data input of the geological facies configuration interface acquisition module between the water injection well and the oil production well. The data output of the dynamic interference characteristic acquisition module between the water injection well and the oil production well is connected to the data input of the relative dominant seepage channel development location acquisition module between the water injection well and the oil production well. The data outputs of the geological facies configuration interface acquisition module between the water injection well and the oil production well and the relative dominant seepage channel development location acquisition module between the water injection well and the oil production well are each independently connected to the data input of the reservoir configuration interface acquisition module between the water injection well and the oil production well. The data output of the reservoir configuration interface acquisition module between the water injection well and the oil production well is connected to the data input of the reservoir configuration division scheme acquisition module between the carbonate reservoir injection and production wells.

[0041] In this invention, the sedimentary configuration interface acquisition module between the water injection well and the oil production well obtains the sedimentary facies and sedimentary microfacies division results through single-well sedimentary facies analysis, and obtains the sedimentary configuration interface between the water injection well and the oil production well by combining seismic inversion data.

[0042] In this invention, the geological facies configuration interface acquisition module between the water injection well and the oil production well acquires the geological facies configuration interface between the water injection well and the oil production well based on the sedimentary configuration interface and combined with the conventional logging curves of the single well and the geological facies interpretation results.

[0043] In this invention, the dynamic interference feature acquisition module between the water injection well and the oil production well acquires the dynamic interference features between the water injection well and the oil production well based on the analysis of single-well dynamic data.

[0044] In this invention, the module for obtaining the development location of the relatively dominant seepage channels between the injection well and the production well obtains the development location of the relatively dominant seepage channels between the injection well and the production well based on the single well production profile and water absorption profile.

[0045] In this invention, the reservoir configuration interface acquisition module between the water injection well and the oil production well acquires the reservoir configuration interface between the water injection well and the oil production well based on dynamic interference characteristics and the development location of relatively dominant seepage channels, combined with the geological facies configuration interface.

[0046] In this invention, the reservoir configuration division scheme acquisition module between carbonate oil reservoir injection and production wells obtains the reservoir configuration division scheme between carbonate oil reservoir injection and production wells based on dynamic and static data, taking the reservoir configuration interface as the basis and the dynamic interference characteristics and the development location of the relatively dominant seepage channels as the basis.

[0047] Thirdly, the present invention provides a computer device including a memory, a processor, and a computer program stored in the memory and running on the processor, wherein the processor executes the computer program to implement the determination method described in the first aspect.

[0048] Fourthly, the present invention provides a computer-readable storage medium storing a computer program for performing the determination method described in the first aspect.

[0049] Compared with existing technical solutions, the present invention has at least the following beneficial effects:

[0050] (1) The method for determining the reservoir configuration between injection and production wells in carbonate oil reservoirs provided by this invention fully considers the relative positional relationship between injection wells and production wells, and carries out the classification and evaluation of reservoir configuration between injection and production wells, based on the original method of dissecting sedimentary configuration and reservoir configuration with different types of sedimentary bodies.

[0051] (2) The method for determining the reservoir configuration between injection and production wells in carbonate reservoirs provided by this invention fully considers dynamic and static data such as sedimentary background, diagenesis, logging characteristics, seismic inversion response characteristics, production dynamic response characteristics, and dynamic monitoring. Based on the interface division of sedimentary configuration and geological facies configuration between injection and production wells, it makes full use of the dynamic characteristics and monitoring data of actual development wells, clarifies the relationship between geological facies and reservoir facies, and determines the classification scheme of reservoir configuration between injection and production wells on this basis. This method is more in line with the production needs of the oilfield. Through the full integration of multiple disciplines and multiple data, the resulting classification scheme of reservoir configuration between injection and production wells can more accurately characterize the longitudinal and lateral distribution characteristics of high-permeability layers, interlayers, and intercalations in this type of reservoir. The research results can provide corresponding technical support for the formulation of water injection development schemes for this type of reservoir and improve development efficiency. Attached Figure Description

[0052] Figure 1 This is a flowchart of the method for determining the reservoir configuration between injection and production wells in carbonate oil reservoirs provided in Example 1;

[0053] Figure 2 This is a comprehensive columnar section of sedimentary microfacies division for injection well p1 in Example 1;

[0054] Figure 3 This is a comprehensive columnar section of sedimentary microfacies division for the p2 oil well in Example 1;

[0055] Figure 4 This is a comprehensive columnar section of sedimentary microfacies division for the p3 oil well in Example 1;

[0056] Figure 5 This is a planar distribution map of the dominant sedimentary facies at different stratigraphic levels within a certain injection-production well group in Example 1;

[0057] Figure 6 This is a diagram showing the sedimentary configuration interface division results between a certain injection and production well in Example 1;

[0058] Figure 7 This is a comparison diagram of the geological facies interface division results between injection and production wells in Example 1;

[0059] Figure 8 This is a dynamic characteristic curve diagram between injection and production wells in Example 1;

[0060] Figure 9 This is a scatter plot of static pressure changes in p1 water injection well and p3 oil production well in Example 1;

[0061] Figure 10 This is a scatter plot of water quality salinity monitoring data for p1 injection well and p3 production well in Example 1;

[0062] Figure 11 This is a water intake profile of the p1 injection well in Example 1;

[0063] Figure 12 This is a production profile of the p2 oil well in Example 1;

[0064] Figure 13 This is a production profile of the p3 oil well in Example 1;

[0065] Figure 14 This is a comparison diagram of reservoir configurations between injection and production wells in Example 1;

[0066] Figure 15 This is a schematic diagram of the connection of the device system provided in Example 2 for determining the reservoir configuration between injection and production wells in carbonate oil reservoirs.

[0067] The present invention will now be described in further detail. However, the examples described below are merely simplified examples of the present invention and do not represent or limit the scope of protection of the present invention. The scope of protection of the present invention is determined by the claims. Detailed Implementation

[0068] The technical solution of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0069] To better illustrate the present invention and facilitate understanding of its technical solutions, typical but non-limiting embodiments of the present invention are as follows:

[0070] Example 1

[0071] This embodiment provides a method for determining the reservoir configuration between injection and production wells in carbonate oil reservoirs, such as... Figure 1 As shown, the determination method includes the following steps:

[0072] S101. Based on the single-well sedimentary facies interpretation results and seismic inversion data, obtain the sedimentary configuration interface corresponding to the relative positions of injection wells and production wells. This includes the following two steps:

[0073] The first step is to obtain the sedimentary facies and sedimentary microfacies classification results of oil production wells and water injection wells in the target strata based on the results of single-well sedimentary facies research.

[0074] Figure 2 This is a comprehensive columnar section showing the sedimentary microfacies division of the p1 injection well in this embodiment. Figure 3 This is a comprehensive columnar section showing the sedimentary microfacies division of the p2 oil well in this embodiment. Figure 4 This is a comprehensive columnar section showing the sedimentary microfacies division of the p3 oil well in this embodiment.

[0075] Depend on Figure 2-4 It can be seen that wells p1, p2 and p3 mainly develop tidal channels, bioclastic shoals and lagoonal sedimentary microfacies.

[0076] The second step involves seismic inversion data. Inversion methods and results that can represent the effective reservoir development characteristics are selected. Combined with the results of single-well sedimentary facies and sedimentary microfacies classification, the planar distribution characteristics of sedimentary microfacies and sedimentary configuration interfaces are obtained.

[0077] Figure 5 This is a planar distribution map of the dominant sedimentary facies at different stratigraphic levels within a specific injection-production well group in this embodiment. Figure 6 This is a diagram showing the sedimentary configuration interface division results between a certain injection and production well in this embodiment.

[0078] Depend on Figure 5-6 It can be seen that the sedimentary structure of the three wells p1, p2 and p3 is mainly characterized by tidal channel cutting bioclastic shoals.

[0079] S102. Based on seismic inversion data, sedimentary configuration classification results, and combined with conventional well logging curves and geological facies interpretation results from single wells, the geological facies interface between injection wells and production wells is obtained, specifically including the following steps:

[0080] Based on the sedimentary microfacies interface division scheme between the injection well and the production well obtained in step S101, and combined with the geological facies interpretation results of the single well, the geological facies interface between the injection well and the production well is obtained.

[0081] Figure 7 This embodiment presents a comparison of the geological facies interface between injection and production wells.

[0082] Depend on Figure 7 It can be seen that, due to the influence of diagenesis, the interior of tidal channels and bioclastic shoals can still be further subdivided into different types of geological facies based on the degree of dissolution, laying the foundation for the identification of reservoir physical properties, and the geological facies configuration interface is clear.

[0083] S103. Based on single-well production dynamics data, pressure monitoring data, and water quality analysis data, obtain the dynamic interference characteristics between injection and production wells, specifically including the following steps:

[0084] The first step is to match the development dynamic monitoring time of water injection wells and oil production wells with the single-well production dynamic data and conduct dynamic interference characteristic analysis between water injection wells and oil production wells.

[0085] Figure 8 This is a dynamic characteristic curve diagram between injection and production wells in this embodiment.

[0086] Depend on Figure 8 It can be seen that, affected by the water injection in the p1 injection well, the oil production of the p3 oil production well showed a significant rebound in the later stage, indicating that there is obvious inter-well interference between the two wells.

[0087] The second step, based on single-well pressure monitoring data, refers to monitoring the dynamic interference characteristics between oil production wells and water injection wells based on static pressure tests of single wells.

[0088] Figure 9 This is a scatter plot of the static pressure changes of the p1 water injection well and the p3 oil production well in this embodiment.

[0089] Depend on Figure 9 It can be seen that after water injection in the p1 injection well, the formation pressure near the p3 oil production well shows a gradual recovery trend.

[0090] The third step involves analyzing the water quality monitoring data from injection wells and production wells. Given that carbonate reservoirs are relatively insensitive to the quality of injected water, the analysis compares the mineralization of injected water with that of water produced in production wells by injecting water with different mineralization. If the mineralization of the two is similar and significantly different from that of formation water, it indicates that there is dynamic interference between the injection wells and production wells.

[0091] Figure 10 This is a scatter plot showing the water quality salinity monitoring of p1 injection well and p3 oil production well in this embodiment.

[0092] Depend on Figure 10 It can be seen that the water quality salinity of injection well P1 and production well P3 are different, and that... Figure 8 It can be seen that the water cut of the P3 oil well shows a decreasing trend, indicating that the water cut of the P3 oil well has been effectively suppressed due to the influence of the injected water from the P1 water injection well, and the development effect is improving.

[0093] S104. Based on the production profile and water absorption profile of a single well, determine the location of the relatively dominant seepage channels between the injection well and the production well, specifically including the following steps:

[0094] The first step is to determine the fluid supply of each fluid-producing section in the vertical direction of the reservoir based on the production profile test results of the oil production well or water injection well before water injection.

[0095] The second step is to determine the main water-absorbing layer and the amount of water absorbed by the injected water in the formation based on the water absorption profile of the injection well.

[0096] The third step involves identifying the dominant seepage channels and their development locations between the oil wells and the injection wells based on the longitudinal distribution characteristics of the production profile of the oil wells and the water absorption profile of the injection wells.

[0097] Figure 11 This is a water intake profile of injection well p1 in this embodiment. Figure 12 This is a production profile of the p2 oil well in this embodiment. Figure 13 This is a production profile of the p3 oil well in this embodiment.

[0098] Depend on Figure 11-13 It can be seen that the main producing layers of oil wells p2 and p3 are the same, which basically correspond to the main water-absorbing layer of water well p1, and are the dominant seepage channels between injection and production wells.

[0099] S105. Based on the results of dynamic connectivity analysis and combined with the results of static geological facies interface delineation, obtain the reservoir configuration interface between injection wells and production wells, including:

[0100] Based on the dynamic response characteristics between water injection wells and oil production wells and the location of the relatively dominant seepage channels, combined with the results of geological facies interface division, the geological facies seepage characteristics of single wells and between water injection wells and oil production wells can be classified and analyzed. The geological facies and reservoir facies can be correlated and analyzed, thereby clarifying the reservoir configuration development interface between water injection wells and oil production wells.

[0101] Figure 14 This is a comparison diagram of reservoir configurations between injection and production wells in this embodiment.

[0102] Depend on Figure 14 It can be seen that within different sedimentary bodies, due to the influence of diagenesis, there are still certain differences in reservoir properties. The reservoir configuration between injection and production wells can more clearly characterize the differences in reservoir properties between injection and production wells.

[0103] S106. Based on the analysis results of dynamic and static data, and taking static reservoir configuration classification as the basis and dynamic connectivity evaluation as the foundation, a reservoir configuration classification scheme between injection and production wells in carbonate oil reservoirs is finally obtained, including:

[0104] Based on dynamic and static data, and after clarifying the correlation between reservoir geological facies and reservoir facies, the reservoir configuration interface between water injection wells and oil production wells is delineated, and a reservoir configuration classification scheme for carbonate oil reservoirs is determined.

[0105] Example 2

[0106] This embodiment provides a device system for determining the reservoir configuration between injection and production wells in carbonate oil reservoirs. The device system includes:

[0107] The following modules were used to obtain the following information: sedimentary configuration interface between water injection wells and oil production wells (module 1001); geological facies configuration interface between water injection wells and oil production wells (module 1002); dynamic interference characteristics between water injection wells and oil production wells (module 1003); relative dominant seepage channel development location between water injection wells and oil production wells (module 1004); reservoir configuration interface between water injection wells and oil production wells (module 1005); and reservoir configuration classification scheme between water injection and production wells in carbonate reservoirs (module 1006).

[0108] like Figure 15 As shown, when the device system is applied, the data output of the sedimentary configuration interface acquisition module 1001 between the water injection well and the oil production well is connected to the data input of the geological facies configuration interface acquisition module 1002 between the water injection well and the oil production well. The data output of the dynamic interference characteristic acquisition module 1003 between the water injection well and the oil production well is connected to the data input of the relative dominant seepage channel development location acquisition module 1004 between the water injection well and the oil production well. The data outputs of the geological facies configuration interface acquisition module 1002 between the water injection well and the oil production well, and the data outputs of the relative dominant seepage channel development location acquisition module 1004 between the water injection well and the oil production well are independently connected to the data input of the reservoir configuration interface acquisition module 1005 between the water injection well and the oil production well. The data output of the reservoir configuration interface acquisition module 1005 between the water injection well and the oil production well is connected to the data input of the reservoir configuration division scheme acquisition module 1006 between the carbonate reservoir injection and production wells.

[0109] Therefore, the method for determining the reservoir configuration between injection and production wells in carbonate oil reservoirs provided by this invention, based on the original method of analyzing sedimentary and reservoir configurations using different types of sedimentary bodies, fully considers the relative positional relationship between injection wells and production wells, and carries out the classification and evaluation of reservoir configurations between injection and production wells.

[0110] Furthermore, the proposed method fully considers dynamic and static data such as sedimentary background, diagenesis, logging characteristics, seismic inversion response characteristics, production dynamic response characteristics, and dynamic monitoring. Based on the delineation of sedimentary and geological facies interfaces between injection and production wells, it fully utilizes the dynamic characteristics and monitoring data of actual development wells to clarify the relationship between geological and reservoir facies. Based on this, a reservoir configuration delineation scheme between injection and production wells is determined. This method is more in line with the production needs of oilfields. Through the full integration of multiple disciplines and data, the resulting reservoir configuration delineation scheme between injection and production wells can more accurately characterize the longitudinal and lateral distribution characteristics of high-permeability layers, interlayers, and intercalations in this type of reservoir. The research results can provide corresponding technical support for the formulation of water injection development schemes for this type of reservoir and for improving development efficiency.

[0111] The applicant declares that the detailed structural features of the present invention are illustrated through the above embodiments, but the present invention is not limited to the above detailed structural features, that is, it does not mean that the present invention must rely on the above detailed structural features to be implemented. Those skilled in the art should understand that any improvements to the present invention, equivalent substitutions for the components selected in the present invention, additions of auxiliary components, selection of specific methods, etc., all fall within the protection scope and disclosure scope of the present invention.

[0112] The preferred embodiments of the present invention have been described in detail above. However, the present invention is not limited to the specific details in the above embodiments. Within the scope of the technical concept of the present invention, various simple modifications can be made to the technical solution of the present invention, and these simple modifications all fall within the protection scope of the present invention.

[0113] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present invention will not describe the various possible combinations separately.

[0114] Furthermore, various different embodiments of the present invention can be combined in any way, as long as they do not violate the spirit of the present invention, they should also be regarded as the content disclosed by the present invention.

Claims

1. A method for determining the reservoir configuration between injection and production wells in a carbonate oil reservoir, characterized in that, The determination method includes the following steps: (1) The sedimentary facies and sedimentary microfacies division results were obtained by single-well sedimentary facies analysis. Combined with seismic inversion data, the sedimentary configuration interface between water injection wells and oil production wells was obtained. (2) Based on the sedimentary configuration interface between the injection well and the production well described in step (1), and combined with the conventional logging curves of a single well and the geological facies interpretation results, the geological facies configuration interface between the injection well and the production well is obtained. (3) Based on the analysis of single-well dynamic data, the development dynamic monitoring time of water injection wells and oil production wells is correlated, and the dynamic interference characteristics between water injection wells and oil production wells are analyzed. Dynamic interference characteristics are also analyzed based on pressure monitoring data and water quality analysis data. The method of dynamic interference characteristics analysis based on pressure monitoring data includes: monitoring the dynamic interference characteristics between oil production wells and water injection wells based on the static pressure test of a single well. For cases where oil wells are converted into water injection wells, the consistency of the pressure systems of oil wells and water injection wells during the oil production stage before the conversion is analyzed. During the production process of oil wells and water injection wells, the trend of static pressure changes is consistent. If they are consistent, it indicates that there are dynamic interference characteristics between water injection wells and oil wells. For cases where a well is put into production as a water injection well, and for the stage after an oil well is converted into a water injection well, analyze whether the static pressure and flowing pressure tests of the oil well after the water injection well starts to show any response characteristics of formation pressure recovery or a slowdown in the decreasing trend compared to before water injection. If there are corresponding characteristics, it indicates that there are dynamic interference characteristics between the water injection well and the oil well. (4) Based on the production profile and water absorption profile of a single well, the location of the relatively dominant seepage channels between the injection well and the production well is obtained; (5) Based on the dynamic disturbance characteristics described in step (3) and the location of the development of the relatively dominant seepage channels described in step (4), and combined with the geological facies interface described in step (2), the reservoir configuration interface between the injection well and the production well is obtained. (6) Based on dynamic and static data, and taking the reservoir configuration interface described in step (5) as the basis, and taking the dynamic interference characteristics described in step (3) and the location of the relatively dominant seepage channels described in step (4) as the basis, a classification scheme for the reservoir configuration between injection and production wells in carbonate oil reservoirs is obtained.

2. The determination method according to claim 1, characterized in that, The method for obtaining the sedimentary configuration interface between the injection well and the production well in step (1) includes: Based on the results of single-well sedimentary facies research, the sedimentary facies and sedimentary microfacies classification results of oil production wells and water injection wells in the target interval were obtained; Based on seismic inversion data, inversion methods and results that can represent the effective reservoir development characteristics are selected. Combined with the results of single-well sedimentary facies and sedimentary microfacies classification, the planar distribution characteristics of sedimentary microfacies and sedimentary configuration interfaces are obtained.

3. The determination method according to claim 1, characterized in that, The dynamic interference characteristic analysis between the injection well and the production well in step (3) includes: For cases where oil wells are converted to water injection wells, the analysis focuses on the consistency of the dynamic characteristics of oil wells and water injection wells during the oil production stage before the conversion, under unchanged external conditions. Alternatively, it examines whether the corresponding oil wells or water injection wells exhibit response characteristics after changes in their external conditions. If a response is observed, it indicates the presence of dynamic interference characteristics between wells. For wells that are put into production immediately as water injection wells and for wells that have been converted from oil production wells to water injection wells, we analyze whether the dynamic characteristics of the oil production wells have response characteristics after the water injection wells start injecting water. If there is a response, it indicates the existence of dynamic interference characteristics between wells.

4. The determination method according to claim 1, characterized in that, The method for dynamic interference characteristic analysis based on water quality analysis data in step (3) includes: when the carbonate reservoir is not sensitive to the quality of injected water, by injecting water with different mineralization, the mineralization of the water between the oil wells is compared and analyzed. If the mineralization of the oil wells and the injection wells is similar and significantly different from that of the formation water, it indicates that there is dynamic interference characteristic between the injection wells and the oil wells.

5. The determination method according to claim 1, characterized in that, The method for obtaining the location of the relatively dominant seepage channels between the injection well and the production well in step (4) includes: Based on the production profile test results of the oil production well or water injection well before water injection, determine the fluid supply of each fluid-producing section in the vertical direction of the reservoir. Based on the water absorption profile of the injection well, determine the main water-absorbing layer and the amount of water absorbed by the injected water in the formation. Based on the longitudinal distribution characteristics of the production profile of oil wells and the water absorption profile of injection wells, the dominant seepage channels and their development locations between injection wells and oil wells are identified.

6. The determination method according to claim 1, characterized in that, The method for obtaining the reservoir configuration interface between the injection well and the production well in step (5) includes: Based on the dynamic response characteristics and the location of the relatively dominant seepage channels between water injection wells and oil production wells, and combined with the results of geological facies interface division, the geological facies seepage characteristics of single wells and between water injection wells and oil production wells are classified and analyzed. The geological facies and reservoir facies are correlated and analyzed to determine the reservoir configuration development interface between water injection wells and oil production wells.

7. The determination method according to claim 1, characterized in that, The method for obtaining the reservoir configuration classification scheme between injection and production wells in carbonate oil reservoirs in step (6) includes: Based on dynamic and static data, the correlation between reservoir geological facies and reservoir facies is determined, the reservoir configuration interface between water injection wells and oil production wells is further determined, and a reservoir configuration classification scheme for carbonate oil reservoirs is determined.

8. A device system for determining the reservoir configuration between injection and production wells in carbonate oil reservoirs, characterized in that, The apparatus system operates according to the determining method according to any one of claims 1-7, the apparatus system comprising: Modules for obtaining the sedimentary configuration interface between water injection wells and oil production wells, modules for obtaining the geological facies configuration interface between water injection wells and oil production wells, modules for obtaining the dynamic interference characteristics between water injection wells and oil production wells, modules for obtaining the development location of the relatively dominant seepage channels between water injection wells and oil production wells, modules for obtaining the reservoir configuration interface between water injection wells and oil production wells, and modules for obtaining the reservoir configuration division scheme between water injection and production wells in carbonate reservoirs. The data output of the sedimentary configuration interface acquisition module between the water injection well and the oil production well is connected to the data input of the geological facies configuration interface acquisition module between the water injection well and the oil production well. The data output of the dynamic interference characteristic acquisition module between the water injection well and the oil production well is connected to the data input of the relative dominant seepage channel development location acquisition module between the water injection well and the oil production well. The data outputs of the geological facies configuration interface acquisition module between the water injection well and the oil production well and the relative dominant seepage channel development location acquisition module between the water injection well and the oil production well are each independently connected to the data input of the reservoir configuration interface acquisition module between the water injection well and the oil production well. The data output of the reservoir configuration interface acquisition module between the water injection well and the oil production well is connected to the data input of the reservoir configuration division scheme acquisition module between the carbonate reservoir injection and production wells.

9. A computer device comprising a memory, a processor, and a computer program stored in the memory and running on the processor, characterized in that, When the processor executes the computer program, it implements the determination method according to any one of claims 1-7.

10. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program that performs the determining method according to any one of claims 1-7.

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