Evaluation method, device, storage medium and electronic equipment for controlling oil and gas enrichment

Abstract

The embodiment of the present invention discloses a method, device, storage medium and electronic device for evaluating fault-controlled oil and gas enrichment, the method comprising: obtaining geological information of the fault corresponding to the exploration target; determining the oil supply capacity, conductivity and filling capacity of the fault according to the geological information; determining the reservoir control capability coupling coefficient of the fault according to the oil supply capacity, conductivity and filling capacity; and evaluating the fault-controlled oil and gas enrichment of the exploration target according to the reservoir control capability coupling coefficient. The technical solution provided by the embodiment of the present invention takes into account the oil supply capacity, conductivity and filling capacity of the exploration target fault, improves the accuracy of quantitative evaluation of fault-controlled oil and gas enrichment, and at the same time, can efficiently find oil and gas enriched fault blocks in many complex fault block closures, thereby effectively guiding oil and gas exploration.

Description

Technical Field

[0001] The embodiments of the present invention relate to the technical field of petroleum geology, and in particular to an evaluation method, device, storage medium and electronic device for fault-controlled oil and gas enrichment. Background Art

[0002] Faults play a very important role in the process of oil and gas accumulation. According to statistics from 18 basins and 40 typical oil and gas fields in China, more than 70% of oil and gas accumulation is controlled by faults. Among them, the generation, migration, accumulation and preservation of oil and gas are all related to fault activities. The study of fault-controlled oil and gas enrichment evaluation is of great significance for in-depth exploration of the impact of faults on oil and gas accumulation and revealing the laws of oil and gas migration and accumulation.

[0003] However, the current research on fault-controlled oil and gas enrichment evaluation is mostly qualitative analysis of faults active during the main accumulation period, or quantitative analysis of a single factor, and no quantitative evaluation method specifically for the control of Paleogene faults has been proposed at home and abroad. Due to the large number and complexity of Paleogene fault block closures, the oil and gas enrichment of different fault blocks is jointly controlled by a variety of accumulation factors, and the contribution of different accumulation factors is different. However, the quantitative evaluation of this single factor has low accuracy and cannot effectively guide the exploration of Paleogene fault block oil and gas reservoirs.

[0004] Therefore, how to provide a comprehensive prediction model of multi-factor fault-controlled reservoirs to improve the accuracy of quantitative evaluation of fault-controlled oil and gas enrichment is a technical problem that needs to be solved urgently by those skilled in the art. Summary of the invention

[0005] The embodiments of the present invention provide a method, device, storage medium and electronic device for evaluating fault-controlled oil and gas enrichment, which can improve the accuracy of quantitative evaluation of fault-controlled oil and gas enrichment degree, and can also efficiently find oil and gas enriched fault blocks in many complex fault block closures, thereby effectively guiding oil and gas exploration.

[0006] In a first aspect, an embodiment of the present invention provides a method for evaluating fault-controlled oil and gas enrichment, comprising:

[0007] Obtain geological information of the faults corresponding to the exploration target;

[0008] Determine the oil supply capacity, transport capacity and filling capacity of the fault according to the geological information;

[0009] Determining the coupling coefficient of the reservoir-controlling capability of the fault according to the oil supply capability, the transport capability and the filling capability;

[0010] The exploration target is evaluated for fault-controlled oil and gas enrichment according to the coupling coefficient of the reservoir control capability.

[0011] In a second aspect, an embodiment of the present invention further provides an evaluation device for fault-controlled oil and gas enrichment, comprising:

[0012] A geological information acquisition module is used to acquire geological information of the fault corresponding to the exploration target;

[0013] A reservoir control capability determination module, used to determine the oil supply capability, transport capability and filling capability of the fault according to the geological information;

[0014] A coupling coefficient determination module, used to determine the coupling coefficient of the reservoir control capability of the fault according to the oil supply capability, the transport capability and the filling capability;

[0015] An evaluation module is used to evaluate the fault-controlled oil and gas enrichment of the exploration target according to the coupling coefficient of the reservoir control capability.

[0016] In a third aspect, an embodiment of the present invention provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the method for evaluating fault-controlled oil and gas enrichment as provided in an embodiment of the present invention.

[0017] In a fourth aspect, an embodiment of the present invention provides an electronic device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the computer program, the evaluation method for controlling oil and gas enrichment as provided in the embodiment of the present invention is implemented.

[0018] The evaluation scheme for fault-controlled oil and gas enrichment provided in the embodiment of the present invention obtains geological information of the fault corresponding to the exploration target; determines the oil supply capacity, conductivity and filling capacity of the fault based on the geological information; determines the coupling coefficient of the reservoir control ability of the fault based on the oil supply capacity, conductivity and filling capacity; and evaluates the fault-controlled oil and gas enrichment of the exploration target based on the reservoir control ability coupling coefficient. The technical scheme provided in the embodiment of the present invention improves the accuracy of quantitative evaluation of fault-controlled oil and gas enrichment by establishing a multi-factor fault-controlled reservoir comprehensive prediction model, taking into account the oil supply capacity, conductivity and filling capacity of the exploration target fault. At the same time, it can also efficiently find oil and gas enriched fault blocks in many complex fault block closures, thereby effectively guiding oil and gas exploration. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a flow chart of a method for evaluating oil and gas enrichment by fault control provided by one embodiment of the present invention;

[0020] Figure 2 It is a schematic diagram of determining the oil supply capacity in a method for evaluating oil and gas enrichment by cutting off and controlling provided by one embodiment of the present invention;

[0021] Figure 3aIt is a schematic diagram of determining the cross-section normal pressure in a method for evaluating oil and gas enrichment by fault control provided by an embodiment of the present invention;

[0022] Figure 3b It is a schematic diagram of determining the shale content of a fault zone in a method for evaluating fault-controlled oil and gas enrichment provided by an embodiment of the present invention;

[0023] Figure 4 It is a schematic diagram of determining the filling capacity in a method for evaluating oil and gas enrichment by fault control provided by an embodiment of the present invention;

[0024] Figure 5 It is a fitting diagram of the coupling coefficient of reservoir control capability and reserve abundance in a fault-controlled oil and gas enrichment evaluation method provided by an embodiment of the present invention;

[0025] Figure 6 It is a structural schematic diagram of an evaluation device for fault-controlled oil and gas enrichment provided by another embodiment of the present invention;

[0026] Figure 7 It is a structural block diagram of an electronic device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0027] Embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although certain embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be construed as being limited to the embodiments described herein, which are instead provided for a more thorough and complete understanding of the present invention. It should be understood that the drawings and embodiments of the present invention are only for exemplary purposes and are not intended to limit the scope of protection of the present invention.

[0028] It should be understood that the various steps described in the method embodiments of the present invention may be performed in different orders and / or in parallel. In addition, the method embodiments may include additional steps and / or omit the steps shown. The scope of the present invention is not limited in this respect.

[0029] The term "including" and its variations used herein are open inclusions, i.e., "including but not limited to". The term "based on" means "based at least in part on". The term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one additional embodiment"; the term "some embodiments" means "at least some embodiments". The relevant definitions of other terms will be given in the following description.

[0030] It should be noted that the concepts such as "first" and "second" mentioned in the present invention are only used to distinguish different devices, modules or units, and are not used to limit the order or interdependence of the functions performed by these devices, modules or units.

[0031] It should be noted that the modifications of "one" and "plurality" mentioned in the present invention are illustrative rather than restrictive, and those skilled in the art should understand that, unless otherwise clearly indicated in the context, it should be understood as "one or more".

[0032] The names of the messages or information exchanged between multiple devices in the embodiments of the present invention are only used for illustrative purposes, and are not used to limit the scope of these messages or information.

[0033] Figure 1 This is a flow chart of a method for evaluating fault-controlled oil and gas enrichment provided by an embodiment of the present invention. The embodiment of the present invention is applicable to the evaluation of fault-controlled oil and gas enrichment in Paleogene strata. The method can be performed by a device for evaluating fault-controlled oil and gas enrichment, which can be composed of hardware and / or software and can generally be integrated into electronic equipment. Figure 1 As shown, the method specifically comprises the following steps:

[0034] S110, obtaining geological information of the fault corresponding to the exploration target.

[0035] The exploration target is a target area for fault-controlled oil and gas enrichment evaluation, and the exploration target includes one or more faults.

[0036] The geological information of the fracture is the geological and geophysical information related to each segmented fracture in the exploration target. The geological information of the fracture may include one or more of the following: the number of segments on the fracture plane, the length of the segment on the fracture plane, the longitudinal length of the fracture in contact with the source rock, the buried depth of the target layer of the fracture, the average density of the overlying strata, the density of formation water, the fracture inclination, the mud content of the target layer and the average thickness of the target layer on both sides of the fracture. The acquisition method may be to use remote sensing technology on a long-distance, high-altitude or outer space platform, using visible light, infrared, microwave and other detectors, through photography and scanning to sense, transmit and process the energy of electrical radiation (including emission, reflection, absorption and transmission), so as to identify the geological information of the target object; it may also be through geophysical well exploration technology, using instruments that measure physical properties such as electricity, sound, heat or radioactivity in the borehole, to obtain various information such as various physical and chemical properties of the underground strata, stratum structure and well depth geometric characteristics.

[0037] In this embodiment, optionally, the geological information of the fracture corresponding to the exploration target includes: geological information of at least one segmented fracture of the fracture corresponding to the exploration target.

[0038] It should be noted that this embodiment uses the faults and stratigraphic information interpreted in the seismic work area to divide the faults corresponding to the exploration target into several segments on the plane, and each segment is a segmented fault. The advantage of this setting is that since the geological information and reservoir-controlling ability of the reservoir-controlling faults in the exploration target are different in different geographical locations, the faults corresponding to the exploration target are divided into several segments on the plane, and the oil supply capacity, conductivity, filling capacity and reservoir-controlling ability coupling coefficient of different segmented faults are determined respectively, so that the exploration target can be accurately and efficiently evaluated for fault-controlled oil and gas enrichment, and the quantitative evaluation accuracy of fault-controlled oil and gas enrichment can be improved.

[0039] For example, Lufeng 13 sag in the Pearl River Mouth Basin can be selected as the research target area, where Lufeng 13 sag in the Pearl River Mouth Basin is a confirmed hydrocarbon-rich depression, most of the faults inside it stopped being active during the main accumulation period, and these faults have an important controlling effect on the Paleogene oil and gas accumulation. Therefore, a trap in the area can be selected as the exploration target to be studied; the geological information of the fault corresponding to the exploration target is obtained by combining the use of remote sensing technology and geophysical well exploration technology.

[0040] S120. Determine the oil supply capacity, transport capacity and filling capacity of the fault according to the geological information.

[0041] The oil supply capacity, conductivity and filling capacity of the fault are comprehensive manifestations of the migration capacity and reservoir control capacity of oil and gas. The relationship between geological information and the oil supply capacity, conductivity and filling capacity of the fault can be established respectively, so that the oil supply capacity, conductivity and filling capacity of the fault can be obtained according to the geological information and the corresponding relationship.

[0042] In this embodiment, optionally, the geological information of the fracture corresponding to the exploration target includes: geological information of at least one segmented fracture of the fracture corresponding to the exploration target; based on the geological information, the oil supply capacity, conductivity and filling capacity of the fracture are determined, including: respectively determining the oil supply capacity, conductivity and filling capacity of each segmented fracture according to the geological information of each segmented fracture of the fracture corresponding to the exploration target.

[0043] By determining the oil supply capacity, transmission capacity and filling capacity of each segmented fracture separately, this process can make the obtained results more accurate.

[0044] In this embodiment, optionally, the oil supply capacity of each segmented fault is determined according to the geological information of each segmented fault of the fault corresponding to the exploration target, including: calculating the oil supply capacity of each segmented fault according to the following formula: S i =L i ×H 1i ; Among them, S irepresents the oil supply capacity of the ith segment rupture, L i represents the length of the fracture plane of the i-th segment fracture, H 1i The longitudinal length of the i-th segmented fault in contact with the source rock. It can be understood that L i and H 1i All belong to the geological information of the i-th segmented fault.

[0045] For example, the exploration target is Lufeng 13 in the Pearl River Mouth Basin. Figure 2 FIG. 1 is a schematic diagram of determining the oil supply capacity in a method for evaluating oil and gas enrichment by controlling the oil and gas enrichment provided by an embodiment of the present invention. Figure 2 As shown, the fracture plane is divided into several fracture segments, and the length L of each fracture segment is measured. i Then, the longitudinal length H of the contact between the fault and the source rock is calculated based on the contact relationship between the fault and the top and bottom of the source rock on the seismic profile. 1i Finally, using the fracture plane length L i and the longitudinal length H of the contact between the fault and the source rock 1i The product represents the oil supply capacity S i .

[0046] In this embodiment, optionally, the conductivity of each segmented fault is determined based on the geological information of each segmented fault corresponding to the exploration target, including: calculating the cross-sectional normal pressure and the mud content of the fault zone of each segmented fault based on the geological information of each segmented fault corresponding to the exploration target; calculating the conductivity of each segmented fault based on the cross-sectional normal pressure and the mud content of the fault zone of each segmented fault.

[0047] It should be noted that the conductivity of each segmented fault is related to its cross-sectional normal pressure and the mud content of the fault zone. Therefore, when calculating the conductivity of each segmented fault, it is necessary to first determine its cross-sectional normal pressure and the mud content of the fault zone.

[0048] In this embodiment, optionally, the cross-sectional normal pressure of each segmented fault and the shale content of the fault zone are calculated according to the geological information of each segmented fault of the fault corresponding to the exploration target, including: calculating the cross-sectional normal pressure of each segmented fault according to the following formula: P i =0.009876H 2i (ρ r -ρ w )cosθ; where P i represents the normal pressure of the section of the i-th segment fracture, H 2i represents the medium burial depth of the target fault layer of the i-th segment fault, ρ r represents the average density of the overlying strata, ρ wrepresents the density of formation water, and θ represents the fracture dip. It can be understood that P i , H 2i , r , w and θ are the geological information of the i-th segmented fault.

[0049] For example, the exploration target is Lufeng 13 in the Pearl River Mouth Basin. Figure 3a FIG. 1 is a schematic diagram of determining the cross-section normal pressure in a method for evaluating cross-section control oil and gas enrichment provided by an embodiment of the present invention. Figure 3a As shown, first, the formation water density ρ is obtained based on the regional experience w , average density of overlying strata ρ r , using seismic profile information to obtain the target layer buried in the middle and deep H 2i And the fracture inclination angle θ; then, the cross-sectional normal pressure P of each segmented fracture can be calculated according to the regional empirical formula i .

[0050] The shale content of each segmented fault is calculated according to the following formula: Among them, R i represents the shale content of the fault zone of the i-th segment fault, L 1i represents the vertical fault distance of the ith segment fault, V sh Indicates the mud content of the target layer, H 3i represents the average thickness of the two target layers of the i-th segment fracture. It can be understood that L 1i 、V sh and H 3i All belong to the geological information of the i-th segmented fault.

[0051] It should be noted that, in addition to being calculated using the above formula, the mud content of the fault zones of the various segmented faults can also be replaced by an approximate value of the mud content of the corresponding formations actually drilled in surrounding wells.

[0052] For example, the exploration target is Lufeng 13 in the Pearl River Mouth Basin. Figure 3b FIG. 1 is a schematic diagram of determining the shale content of a fault zone in a method for evaluating fault-controlled oil and gas enrichment provided by an embodiment of the present invention. Figure 3b As shown in the figure, first, the formation mud content V is obtained based on the wells drilled around the exploration target. sh , according to the seismic profile, the average thickness of the two plates of the fault is obtained 3i And vertical fault distance data L 1i ; Then, the shale content R in the fault zone is calculated according to the empirical formula i .

[0053] The conductivity of each segmental fault is calculated according to the cross-sectional normal pressure of each segmental fault and the mud content of the fault zone. The conductivity of each segmental fault is calculated according to the following formula: i =1 / (P i ×R i ). Among them, F i represents the conductivity of the ith segmental fault.

[0054] It should be noted that the conductivity is negatively correlated with the cross-section normal pressure and the mud content of the fault zone, so the inverse of the product of the two is used to represent the conductivity. In other words, the lower the mud content of the fault zone, the smaller the cross-section normal pressure, and the stronger the conductivity of the fault.

[0055] In this embodiment, optionally, the filling capacity of each segmented fault is determined according to the geological information of each segmented fault of the fault corresponding to the exploration target, including: calculating the filling capacity of each segmented fault according to the following formula: C i =L i ×F i Among them, C i Represents the charging capacity of the i-th segmental fault.

[0056] It should be noted that the longer the contact length between the fault and the trap, the stronger the conductivity of the fault and the stronger the ability of oil and gas to fill the trap. Therefore, the filling capacity can be characterized by the product of the contact length between the fault and the trap on the plane and the conductivity of the corresponding fault.

[0057] For example, the exploration target is Lufeng 13 in the Pearl River Mouth Basin. Figure 4 FIG. 1 is a schematic diagram of determining the filling capacity in a method for evaluating oil and gas enrichment by fault control provided by an embodiment of the present invention. Figure 4 As shown, the trap is a low-potential oil and gas zone in the reservoir that is closed by a high-potential oil and gas zone or a combination of an impermeable barrier. The length L of the fracture plane of each segmented fracture is i and its conduction capacity F i The product of is the filling capacity C of each segmented fault. i .

[0058] S130. Determine the coupling coefficient of the reservoir-controlling capability of the fault according to the oil supply capacity, the transport capacity and the filling capacity.

[0059] The coupling coefficient of the fault's reservoir-controlling ability is a quantitative representation of the fault's reservoir-controlling ability of the exploration target.

[0060] In this embodiment, optionally, the geological information of the fracture corresponding to the exploration target includes: geological information of at least one segmented fracture of the fracture corresponding to the exploration target; according to the geological information, the oil supply capacity, conductivity and filling capacity of the fracture are determined, including: according to the geological information of each segmented fracture of the fracture corresponding to the exploration target, the oil supply capacity, conductivity and filling capacity of each segmented fracture are determined; according to the oil supply capacity, conductivity and filling capacity, the coupling coefficient of the reservoir control capacity of the fracture is determined, including: according to the oil supply capacity, conductivity and filling capacity of each segmented fracture, the coupling coefficient of the reservoir control capacity of each segmented fracture is determined; the sum of the coupling coefficients of the reservoir control capacity of each segmented fracture of the fracture corresponding to the exploration target is used as the coupling coefficient of the reservoir control capacity of the fracture.

[0061] By taking the sum of the reservoir-controlling coupling coefficients of each segmented fault as the reservoir-controlling coupling coefficient of the fault, and considering that the geological information of each segmented fault may be different, segmented processing can improve the evaluation accuracy of fault-controlled oil and gas enrichment.

[0062] In this embodiment, optionally, determining the coupling coefficient of the reservoir-controlling ability of the fault according to the oil supply capacity, the conductivity and the filling capacity includes: coupling the oil supply capacity, the conductivity and the filling capacity to determine the coupling coefficient of the reservoir-controlling ability of the fault; wherein the coupling coefficient of the reservoir-controlling ability of the fault is determined according to the following formula: Wherein, K represents the coupling coefficient of the fault's reservoir-controlling ability.

[0063] It should be noted that the coupling coefficient of the reservoir-controlling ability of the fracture is obtained by summing the coupling coefficients of the reservoir-controlling ability of all segmented fractures in the exploration target. Since the fractures of the exploration target are segmented, the coupling coefficient of the reservoir-controlling ability of the fracture obtained by calculation based on the geological information of each segmented fracture is more accurate and more in line with the actual geological laws, and thus can better evaluate the oil and gas enrichment controlled by the exploration target fractures and predict the reserve abundance of the exploration target.

[0064] S140, evaluating the fault-controlled oil and gas enrichment of the exploration target according to the reservoir-controlling capability coupling coefficient.

[0065] Among them, the coupling coefficient of the control capacity of faults can be used to evaluate the fault-controlled oil and gas enrichment evaluation of the exploration target from the following two aspects: first, according to the calculation results of the oil supply capacity, conductivity and filling capacity of the exploration target in the fault-controlled oil and gas enrichment evaluation method, they are compared with the oil supply capacity, conductivity and filling capacity of the discovered oil fields, and the main controlling factors of the reservoir formation of the exploration target are analyzed based on the comparison results; second, in the exploration area with fewer samples, the established comprehensive characterization model of the control capacity of faults can be used, that is, the formula for determining the coupling coefficient of the control capacity of faults, to determine the coupling coefficient of the control capacity of faults in undrilled areas, and compare and analyze it with the control capacity of faults in drilled areas, and judge the probability of reservoir formation in undrilled areas based on the results.

[0066] The evaluation scheme for fault-controlled oil and gas enrichment provided in the embodiment of the present invention obtains geological information of the fault corresponding to the exploration target; determines the oil supply capacity, conductivity and filling capacity of the fault based on the geological information; determines the coupling coefficient of the reservoir control ability of the fault based on the oil supply capacity, conductivity and filling capacity; and evaluates the fault-controlled oil and gas enrichment of the exploration target based on the reservoir control ability coupling coefficient. The technical scheme provided in the embodiment of the present invention improves the accuracy of quantitative evaluation of fault-controlled oil and gas enrichment by establishing a multi-factor fault-controlled reservoir comprehensive prediction model, taking into account the oil supply capacity, conductivity and filling capacity of the exploration target fault. At the same time, it can also efficiently find oil and gas enriched fault blocks in many complex fault block closures, thereby effectively guiding oil and gas exploration.

[0067] In the above embodiments, after determining the coupling coefficient of the reservoir-controlling ability of the fault, it can also include: obtaining the first reserve abundance of the oil field within the preset range of the exploration target and its corresponding coupling coefficient of reservoir-controlling ability; fitting according to the first reserve abundance and its corresponding coupling coefficient of reservoir-controlling ability to obtain a fitting result; based on the fitting result and the coupling coefficient of the reservoir-controlling ability of the fault, predicting the second reserve abundance of the exploration target.

[0068] It is understandable that the oil fields within the preset range of the exploration target are developed oil fields located around the exploration target, wherein the preset range can be set manually, for example, it can be developed oil fields within a range with a preset range radius of 15 kilometers with the exploration target location as the center. Since the oil fields within the preset range of the exploration target are developed oil fields, the first reserve abundance and its corresponding coupling coefficient of reservoir control capability are known and can be obtained by consulting the data of the oil fields within the preset range of the exploration target.

[0069] The exploration target and the oil fields within the preset range of the exploration target are in the same region, and their oil and gas enrichment laws are highly similar. Therefore, by fitting the first reserve abundance and its corresponding reservoir-controlling coupling coefficient, a linear fitting result of the reserve abundance related to the reservoir-controlling coupling coefficient can be obtained, and the second reserve abundance of the exploration target can be predicted using the fitting result. Among them, the fitting method can be fitted using the least squares method, or it can be fitted using the built-in function or curve fitting toolbox in MATLAB. Substituting the reservoir-controlling coupling coefficient of the fault into the fitting result, the second reserve abundance of the exploration target can be determined.

[0070] For example, the exploration target is Lufeng 13 in the Pearl River Mouth Basin. Figure 5 It is a fitting diagram of the coupling coefficient of reservoir-controlling ability and reserve abundance in a method for evaluating fault-controlled oil and gas enrichment provided by one embodiment of the present invention. Specifically, the geological information of the fault corresponding to the developed oil field within 15 kilometers around Lufeng 13 depression in the Pearl River Mouth Basin is obtained; its first reserve abundance and its corresponding coupling coefficient of reservoir-controlling ability are determined; fitting is performed according to the first reserve abundance and its corresponding coupling coefficient of reservoir-controlling ability to obtain a fitting result. Figure 5 As shown, the functional relationship of the fitting result is Q=17.036K-101.19, where Q represents the reserve abundance; and the correlation coefficient R 2 =0.9446, where R 2 The correlation coefficient between the coupling coefficient of the reservoir-controlling ability and the reserve abundance indicates that the two present a good linear relationship with a high goodness of fit. The fitting result can reflect the relationship between the reservoir-controlling ability of faults and reserve abundance in the surrounding areas of Lufeng 13 sag in the Pearl River Mouth Basin, which is in line with the actual geological laws. It also shows that the quantitative characterization model of the reservoir-controlling ability of faults established in the embodiment of the present invention is feasible.

[0071] Figure 6 FIG. 1 is a schematic diagram of a structural diagram of an evaluation device for controlling oil and gas enrichment provided by another embodiment of the present invention. Figure 6 As shown, the device includes: a geological information acquisition module 610, a reservoir control capability determination module 620, a coupling coefficient determination module 630 and an evaluation module 640.

[0072] A geological information acquisition module 610 is used to acquire geological information of the fault corresponding to the exploration target;

[0073] The reservoir control capability determination module 620 is used to determine the oil supply capability, transport capability and filling capability of the fault according to the geological information;

[0074] A coupling coefficient determination module 630 is used to determine the coupling coefficient of the reservoir control capability of the fault according to the oil supply capability, the transport capability and the filling capability;

[0075] The evaluation module 640 is used to evaluate the fault-controlled oil and gas enrichment of the exploration target according to the reservoir control capability coupling coefficient.

[0076] The evaluation device for fault-controlled oil and gas enrichment provided in the embodiment of the present invention obtains geological information of the fault corresponding to the exploration target; determines the oil supply capacity, conductivity and filling capacity of the fault according to the geological information; determines the coupling coefficient of the reservoir control ability of the fault according to the oil supply capacity, conductivity and filling capacity; and evaluates the fault-controlled oil and gas enrichment of the exploration target according to the reservoir control ability coupling coefficient. The technical solution provided in the embodiment of the present invention improves the accuracy of quantitative evaluation of fault-controlled oil and gas enrichment by establishing a multi-factor fault-controlled reservoir comprehensive prediction model, taking into account the oil supply capacity, conductivity and filling capacity of the exploration target fault, and at the same time, can also efficiently find oil and gas enriched fault blocks in many complex fault block closures, thereby effectively guiding oil and gas exploration.

[0077] Optionally, the geological information of the fracture corresponding to the exploration target includes: geological information of at least one segmented fracture of the fracture corresponding to the exploration target;

[0078] The reservoir control capability determination module 620 includes:

[0079] The reservoir control capability determination unit is used to determine the oil supply capability, transport capability and filling capability of each segmented fault according to the geological information of each segmented fault of the fault corresponding to the exploration target;

[0080] The coupling coefficient determination module 630 includes:

[0081] The sub-coupling coefficient determination unit is used to determine the coupling coefficient of the reservoir control capability of each segmented fault according to the oil supply capability, conductivity capability and filling capability of each segmented fault;

[0082] The total coupling coefficient determination unit is used to take the sum of the reservoir-controlling coupling coefficients of each segmented fault of the fault corresponding to the exploration target as the reservoir-controlling coupling coefficient of the fault.

[0083] Optionally, the reservoir control capability determination unit is specifically used for:

[0084] The oil supply capacity of each segmental rupture is calculated according to the following formula:

[0085] S i =L i ×H 1i ;

[0086] Among them, S i represents the oil supply capacity of the ith segment rupture, L i represents the length of the fracture plane of the i-th segment fracture, H 1i The longitudinal length of the i-th segmented fault in contact with the source rock.

[0087] Optionally, a unit for determining reservoir control capability includes:

[0088] The basic parameter calculation subunit is used to calculate the cross-sectional normal pressure and the shale content of each segmented fault according to the geological information of each segmented fault corresponding to the exploration target;

[0089] The conductivity calculation subunit is used to calculate the conductivity of each segmented fault according to the cross-sectional normal pressure of each segmented fault and the mud content of the fault zone.

[0090] Optional, basic parameter calculation subunit, specifically used for:

[0091] The normal pressure of each segmented fracture is calculated according to the following formula:

[0092] P i =0.009876H 2i (ρ r -ρ w )cosθ;

[0093] Among them, P i represents the normal pressure of the section of the i-th segment fracture, H 2i represents the medium burial depth of the target fault layer of the i-th segment fault, ρ r represents the average density of the overlying strata, ρ w represents the density of formation water, and θ represents the fracture dip;

[0094] The shale content of each segmented fault is calculated according to the following formula:

[0095]

[0096] Among them, R i represents the shale content of the fault zone of the i-th segment fault, L 1i represents the vertical fault distance of the ith segment fault, V sh Indicates the mud content of the target layer, H 3i represents the average thickness of the two target layers of the i-th segmental fracture;

[0097] The conductivity of each segmental fault is calculated based on the normal pressure of the section and the mud content of the fault zone, including:

[0098] The conductivity of each segmental fault is calculated according to the following formula:

[0099] F i =1 / (P i ×R i );

[0100] Among them, F i represents the conductivity of the ith segmental fault.

[0101] Optionally, the reservoir control capability determination unit is specifically used for:

[0102] The filling capacity of each segmented fault is calculated according to the following formula:

[0103] C i =L i ×F i ;

[0104] Among them, C i Represents the charging capacity of the i-th segmental fault.

[0105] Optionally, the coupling coefficient determination module 630 is specifically used to:

[0106] The oil supply capacity, the transport capacity and the filling capacity are coupled to determine the coupling coefficient of the reservoir control capacity of the fault;

[0107] The coupling coefficient of the fault's reservoir-controlling ability is determined according to the following formula:

[0108]

[0109] Wherein, K represents the coupling coefficient of the fault's reservoir-controlling ability.

[0110] The above device can execute the methods provided by all the above embodiments of the present invention, and has the corresponding functional modules and beneficial effects of executing the above methods. For technical details not fully described in the embodiments of the present invention, please refer to the methods provided by all the above embodiments of the present invention.

[0111] The embodiment of the present invention further provides a storage medium containing computer executable instructions, wherein the computer executable instructions are used to perform a method for evaluating oil and gas enrichment by fault control when executed by a computer processor, the method comprising:

[0112] Obtain geological information of the faults corresponding to the exploration target;

[0113] Determine the oil supply capacity, transport capacity and filling capacity of the fault according to the geological information;

[0114] Determining the coupling coefficient of the reservoir-controlling capability of the fault according to the oil supply capability, the transport capability and the filling capability;

[0115] The fault-controlled oil and gas enrichment of the exploration target is evaluated according to the coupling coefficient of the reservoir-controlling ability.

[0116] Storage medium - any of various types of memory devices or storage devices. The term "storage medium" is intended to include: installation media, such as CD-ROM, floppy disk or tape device; computer system memory or random access memory, such as DRAM, DDRRAM, SRAM, EDORAM, Rambus RAM, etc.; non-volatile memory, such as flash memory, magnetic media (such as hard disk or optical storage); registers or other similar types of memory elements, etc. The storage medium may also include other types of memory or combinations thereof. In addition, the storage medium may be located in the first computer system in which the program is executed, or may be located in a different second computer system, which is connected to the first computer system via a network (such as the Internet). The second computer system can provide program instructions to the first computer for execution. The term "storage medium" may include two or more storage media that may reside in different locations (for example, in different computer systems connected by a network). The storage medium may store program instructions (for example, embodied as a computer program) that can be executed by one or more processors.

[0117] Of course, the storage medium containing computer executable instructions provided in an embodiment of the present invention is not limited to the evaluation operations of fault-controlled oil and gas enrichment as described above, but can also execute related operations in the evaluation method of fault-controlled oil and gas enrichment provided in any embodiment of the present invention.

[0118] An embodiment of the present invention provides an electronic device, in which the device for evaluating the oil and gas enrichment by controlling the fault condition provided by the embodiment of the present invention can be integrated. Figure 7 The electronic device 700 may include: a memory 701, a processor 702, and a computer program stored in the memory 701 and executable on the processor. When the processor 702 executes the computer program, the method for evaluating the oil and gas enrichment by fault control as described in the embodiment of the present invention is implemented.

[0119] The electronic device provided in the embodiment of the present invention obtains the geological information of the fault corresponding to the exploration target; determines the oil supply capacity, conductivity and filling capacity of the fault according to the geological information; determines the coupling coefficient of the reservoir control ability of the fault according to the oil supply capacity, conductivity and filling capacity; and evaluates the fault-controlled oil and gas enrichment of the exploration target according to the reservoir control ability coupling coefficient. The technical solution provided in the embodiment of the present invention can take into account the oil supply capacity, conductivity and filling capacity of the fault of the exploration target, improve the accuracy of quantitative evaluation of the degree of fault-controlled oil and gas enrichment, and at the same time, can also efficiently find oil and gas enriched fault blocks in many complex fault block closures, thereby effectively guiding oil and gas exploration.

[0120] The evaluation device, storage medium, and electronic device for fault-controlled oil and gas enrichment provided in the above embodiments can execute the evaluation method for fault-controlled oil and gas enrichment provided in any embodiment of the present invention, and have the corresponding functional modules and beneficial effects for executing the method. For technical details not described in detail in the above embodiments, please refer to the evaluation method for fault-controlled oil and gas enrichment provided in any embodiment of the present invention.

[0121] Note that the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A method for evaluating fault-controlled oil and gas enrichment, characterized in that: include: Obtain geological information of the faults corresponding to the exploration target; Determine the oil supply capacity, transport capacity and filling capacity of the fault according to the geological information; Determining the coupling coefficient of the reservoir-controlling capability of the fault according to the oil supply capability, the transport capability and the filling capability; Conducting fault-controlled oil and gas enrichment evaluation on the exploration target according to the reservoir-controlling capability coupling coefficient; The geological information of the fracture corresponding to the exploration target includes: geological information of at least one segmented fracture of the fracture corresponding to the exploration target; According to the geological information, the oil supply capacity, transmission capacity and filling capacity of the fault are determined, including: According to the geological information of each segmented fault corresponding to the exploration target, the oil supply capacity, transmission capacity and filling capacity of each segmented fault are determined; According to the oil supply capacity, conductivity and filling capacity, the coupling coefficient of the reservoir control capability of the fault is determined, including: According to the oil supply capacity, conductivity and filling capacity of each segmented fault, the coupling coefficient of the reservoir control capacity of each segmented fault is determined; The sum of the reservoir-controlling coupling coefficients of each segmented fault of the fault corresponding to the exploration target is taken as the reservoir-controlling coupling coefficient of the fault; Among them, the oil supply capacity of each segmented fault is determined according to the geological information of each segmented fault corresponding to the exploration target, including: The oil supply capacity of each segmental rupture is calculated according to the following formula: S i =L i ×H 1i ; Among them, S i represents the oil supply capacity of the ith segment rupture, L i represents the plane length of the i-th segment fracture, H 1i The longitudinal length of the i-th segmented fault in contact with the source rock.

2. The method according to claim 1, characterized in that According to the geological information of each segmented fault corresponding to the exploration target, the conductivity of each segmented fault is determined, including: According to the geological information of each segmented fault corresponding to the exploration target, the cross-sectional normal pressure of each segmented fault and the mud content of the fault zone are calculated; The conductivity of each segmented fault is calculated based on the cross-sectional normal pressure of each segmented fault and the mud content of the fault zone.

3. The method according to claim 2, characterized in that According to the geological information of each segmented fault corresponding to the exploration target, the cross-sectional normal pressure and the shale content of each segmented fault are calculated, including: The normal pressure of each segmented fracture is calculated according to the following formula: P i =0.009876H 2i (r r -r w )cosθ; Among them, P i represents the normal pressure of the section of the i-th segment fracture, H 2i represents the medium burial depth of the target fault layer of the i-th segment fault, ρ r represents the average density of the overlying strata, ρ w represents the density of formation water, and θ represents the fracture dip; The shale content of each segmented fault is calculated according to the following formula: Among them, R i represents the shale content of the fault zone of the i-th segment fault, L 1i represents the vertical fault distance of the ith segment fault, V sh Indicates the mud content of the target layer, H 3i represents the average thickness of the two target layers of the i-th segmental fracture; The conductivity of each segmental fault is calculated based on the normal pressure of the section and the mud content of the fault zone, including: The conductivity of each segmental fault is calculated according to the following formula: F i =1 / (P i ×R i ); Among them, F i represents the conductivity of the ith segmental fault.

4. The method according to claim 3, characterized in that According to the geological information of each segmented fault corresponding to the exploration target, the filling capacity of each segmented fault is determined, including: The filling capacity of each segmented fault is calculated according to the following formula: C i =L i ×F i ; Among them, C i Represents the charging capacity of the i-th segmental fault.

5. The method according to claim 4, characterized in that According to the oil supply capacity, conductivity and filling capacity, the coupling coefficient of the reservoir control capability of the fault is determined, including: The oil supply capacity, the transport capacity and the filling capacity are coupled to determine the coupling coefficient of the reservoir control capacity of the fault; The coupling coefficient of the fault's reservoir-controlling ability is determined according to the following formula: Wherein, K represents the coupling coefficient of the fault's reservoir-controlling ability.

6. A device for evaluating oil and gas enrichment by fault control, characterized in that: include: A geological information acquisition module is used to acquire geological information of the fault corresponding to the exploration target; A reservoir control capability determination module, used to determine the oil supply capability, transport capability and filling capability of the fault according to the geological information; A coupling coefficient determination module, used to determine the coupling coefficient of the reservoir control capability of the fault according to the oil supply capability, the transport capability and the filling capability; An evaluation module, used for evaluating the fault-controlled oil and gas enrichment of the exploration target according to the reservoir-controlling capability coupling coefficient; The geological information of the fracture corresponding to the exploration target includes: geological information of at least one segmented fracture of the fracture corresponding to the exploration target; The module for determining reservoir control capability includes: The reservoir control capability determination unit is used to determine the oil supply capability, transport capability and filling capability of each segmented fault according to the geological information of each segmented fault of the fault corresponding to the exploration target; The coupling coefficient determination module includes: The sub-coupling coefficient determination unit is used to determine the coupling coefficient of the reservoir control capability of each segmented fault according to the oil supply capability, conductivity capability and filling capability of each segmented fault; A total coupling coefficient determination unit, used to take the sum of the reservoir-controlling coupling coefficients of each segmented fault of the fault corresponding to the exploration target as the reservoir-controlling coupling coefficient of the fault; Among them, the reservoir control capability determination unit is specifically used for: The oil supply capacity of each segmental rupture is calculated according to the following formula: S i =L i ×H 1i ; Among them, S i represents the oil supply capacity of the ith segment rupture, L i represents the length of the fracture plane of the i-th segment fracture, H 1i The longitudinal length of the i-th segmented fault in contact with the source rock.

7. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the program is executed by a processing device, the method for evaluating fault-controlled oil and gas enrichment as described in any one of claims 1-5 is implemented.

8. An electronic device, characterized in that: It comprises a memory, a processor and a computer program stored in the memory and executable on the processor, wherein the processor implements the evaluation method for fault-controlled oil and gas enrichment as described in any one of claims 1 to 5 when executing the computer program.

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