Balanced development method for fractured-vuggy reservoir

Abstract

The invention provides a method for balanced development of a fractured-vuggy reservoir, and relates to the technical field of oil and gas reservoir development, and the method comprises the following steps: establishing a mathematical model of the development fluid potential of the fractured-vuggy reservoir according to the Bernoulli theory in combination with the fluid flow characteristics in the fracture-vuggy reservoir development process; then, the development fluid potential of the fracture-vug type oil reservoir is represented based on the mathematical model of the development fluid potential of the fracture-vug type oil reservoir; then, based on fracture-cavity depiction and connectivity relation characterization, the development fluid potential of the fracture-cavity type oil reservoir is subjected to balanced regulation and control, and a three-dimensional model of the development fluid potential of a fracture-cavity unit in the current development stage is established; and finally, re-characterizing the development fluid potential of the regulated and controlled fracture-vug type oil reservoir. The invention further provides a mathematical model and a three-dimensional model of the development fluid potential of the fractured-vuggy reservoir, and the mathematical model and the three-dimensional model are applied to balanced development of the reservoir. According to the method, factors are considered more comprehensively, and the effect of fracture-vug type oil reservoir balanced development is better.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of oil and gas reservoir development, and particularly relates to a method for balanced development of a fracture-cave type reservoir. BACKGROUND

[0002] The fracture-cave type reservoir has many types of storage spaces, and the effective storage space distribution is random. The main storage and permeation spaces are solution caves and fractures, and multiple flow modes such as percolation, free flow and turbulent flow coexist. The flow mode and development mode of the fracture-cave type reservoir are complex. The fracture-cave type reservoir does not have the concept of "oil layer" in the traditional sense, and the oil-bearing reservoirs are dispersedly distributed in the Ordovician system, so the reservoir prediction is difficult. In addition, the fracture-cave type reservoir has an imperfect well pattern, low well-controlled geological reserves, and great difficulty in identifying interwell channels and water invasion paths. In particular, the production of oil wells sharply decreases after water breakthrough, and the control and management means are limited, so the primary and secondary recovery rates are low.

[0003] At present, the development of the fracture-cave type reservoir is mainly through pressure data analysis of oil and water production. However, the above development method has a single pressure data parameter, and the analysis result has deviation, thereby affecting the balanced development of the reservoir. Therefore, in order to make the development of the reservoir more balanced, the technical personnel have made a lot of researches on the development method of the fracture-cave type reservoir.

[0004] Chinese patent CN107178357A discloses a method for controlling water and stabilizing oil in a carbonate rock fracture-cave type reservoir. The method comprises: finely identifying and depicting the structure of a fracture-cave unit reservoir; evaluating the connectivity of the fracture-cave unit reservoir according to the results of the fine identification and depiction of the fracture-cave unit reservoir structure; performing flow potential characterization inside the fracture-cave unit according to the connectivity evaluation results of the fracture-cave unit reservoir structure; evaluating the reserve production of the fracture-cave unit according to the connectivity evaluation results of the fracture-cave unit reservoir structure and the flow potential characterization inside the fracture-cave unit; and reconstructing the flow potential balance of the fracture-cave unit according to the flow potential characterization and the reserve production evaluation results. The method of the invention can economically and efficiently realize the balanced development of the fracture-cave unit by adjusting the flow potential of the fracture-cave unit, which can not only effectively prevent or inhibit the rapid coning of bottom water, but also will not passively lose the oil well production capacity.

[0005] In addition, the Chinese invention patent CN114429085A discloses a method for analyzing fluid potential of fracture-vug type reservoir, comprising: carving a target fracture-vug unit, determining a geometric model of the target fracture-vug unit, combining drilling and logging data of the fracture-vug unit to obtain a geological model of the target fracture-vug unit; based on the geological model, according to the current carving result and historical production data of the target fracture-vug unit, using numerical simulation technology to fit the development and production history of the target fracture-vug unit, and establishing an initial distribution model of the target fracture-vug unit including reservoir pressure field, oil saturation field and fluid velocity field; according to the initial distribution model, the fluid potential energy at each position in the model is counted to obtain a fluid potential energy distribution model of the target fracture-vug unit. The invention provides a fluid potential analysis model and characterization for the development of fracture-vug type reservoir, and provides a theoretical basis for the regulation and control technology of balanced development of fracture-vug type reservoir.

[0006] In the previous research process, it is found that the existing technical solutions and model establishment are often not suitable for the uniform development of complex fracture-vug type reservoirs. The invention provides a new method for balanced development of fracture-vug type reservoirs based on the principle of "reducing water potential and increasing oil potential", aiming at the problems of unbalanced oil and water production, serious bottom water channeling and deviation of single parameter analysis results in fracture-vug type reservoirs. SUMMARY

[0007] The invention provides a method for balanced development of fracture-vug type reservoirs, which is based on the principle of "reducing water potential and increasing oil potential" and uses the theory of development fluid potential to guide the development and regulation of fracture-vug type reservoirs. By combining the methods of extraction, control, induction and disturbance, the energy of reservoir fluid is converted to benefit, the flow potential is balanced, and balanced development of fracture-vug units is achieved. The method considers more factors, and the balanced development effect of fracture-vug type reservoirs is better.

[0008] To achieve the above-mentioned purpose, the technical scheme adopted by the invention is as follows:

[0009] Firstly, the invention provides a method for balanced development of fracture-vug type reservoirs, comprising the following steps:

[0010] Step S1: According to Bernoulli's theory, a mathematical model of the development fluid potential of the fracture-vug type reservoir is established by combining the fluid flow characteristics in the development process of the fracture-vug type reservoir; wherein the total mechanical energy of the unit volume of fluid in the reservoir relative to the reference surface becomes the development fluid potential;

[0011] Step S2: The development fluid potential of the fracture-vug type reservoir is characterized based on the mathematical model of the development fluid potential of the fracture-vug type reservoir;

[0012] Step S3: based on the fracture-vug characterization and the connectivity relationship representation, the development fluid potential of the fracture-vug reservoir is balanced and controlled, and a three-dimensional model of the development fluid potential of the fracture-vug unit in the current development stage is established;

[0013] Step S4: the development fluid potential of the fracture-vug reservoir after the control is re-represented.

[0014] Preferably, in step S1, the mathematical model of the development fluid potential of the reservoir is:

[0015]

[0016] In formula (1), Φ is the fluid potential energy, J / m 3 ; ρ is the fluid density, kg / m 3 ; g is the gravity acceleration, m / s 2 ; z is the altitude depth, m; p is the reservoir pressure, Pa; v is the fluid seepage velocity, m / s; is the change of the fluid seepage velocity along the y direction, s -1 ; η is the viscosity coefficient, mPa·s; σ is the interfacial tension, mN / m; θ is the wetting angle; r is the reservoir pore throat radius, m; Q is other energy loss.

[0017] Further preferably, the mathematical model of the development fluid potential of the reservoir is the mathematical model of the development fluid potential of the fracture-vug reservoir, which is:

[0018]

[0019] In formula (2), Φ is the fluid potential energy, J / m 3 ; ρ is the fluid density, kg / m 3 ; g is the gravity acceleration, m / s 2 ; z is the altitude depth, m; p is the reservoir pressure, Pa; v is the fluid seepage velocity, m / s; σ is the interfacial tension, mN / m; θ is the wetting angle; r is the reservoir pore throat radius, m.

[0020] In the present application, the development fluid potential of the fracture-vug reservoir refers to the total mechanical energy of the unit volume of fluid in the reservoir relative to the reference surface during the development of crude oil, including potential energy, pressure energy, kinetic energy, interfacial energy and viscous force energy; wherein the potential energy, the pressure energy and the kinetic energy are the main energy components; and the energy components are different at different stages, and the energy components can be converted into each other, which lays a theoretical foundation for the balanced control of the fluid potential.

[0021] Preferably, step S2 specifically comprises:

[0022] First, the development fluid potential mathematical model of the fracture-cave reservoir and the theoretical algorithm of the characterization method are provided, and based on the software engineering thought, the fracture-cave reservoir development fluid potential calculation software based on the numerical simulation result is developed.

[0023] Secondly, the static and dynamic data of the oil well production are collected, including the reservoir geological characteristics, pressure measurement data, oil well production dynamic data and stimulation measures, and the fracture-cave reservoir development fluid potential characterization software is used for the reservoir fluid potential characterization, the development fluid potential values of the target unit at different times are calculated, the distribution characteristics of the high fluid potential area and the low fluid potential area of the unit are analyzed, the main influencing factors of the fluid potential field change are determined, and the fracture-cave unit regulation and control oil increment potential is evaluated.

[0024] Preferably, in step S3, the development fluid potential of the fracture-cave reservoir is balanced and regulated, and the method is specifically as follows: through the combination of lifting, controlling, guiding and disturbing means, the energy of the reservoir fluid is promoted to tend to benefit and transform, the flow potential is balanced, and the fracture-cave unit is balancedly developed.

[0025] Further preferably, in step S3, the development fluid potential of the fracture-cave reservoir is balanced and regulated, and the method specifically includes the following steps: (1) liquid lifting and flow guiding: on the basis of determining the water invasion source and the water inflow direction, the water invasion path high water cut oil well is selected, the water invasion scale and intensity are slowed down, the water cut rising rate of the affected oil well is reduced, and the oil well development effect is improved; (2) liquid control and water suppression: the liquid in the high water potential area is controlled to reduce the water phase kinetic energy, the bottom water is balancedly lifted, the water body pressure energy and kinetic energy are converted into the reservoir pressure energy, and the reservoir oil-water fluid potential energy is reasonably utilized; (3) water driving oil: for the unevenly affected well group of one injection and multiple production, the liquid in the main water channel oil well is controlled and supplemented by the liquid lifting in the secondary channel, the inherent water line is changed, the water kinetic energy is converted into the oil kinetic energy, the remaining oil is started, and the water drive quality is improved; (4) liquid disturbance and oil increment: for the multiple connected channels between multiple well units, the water phase kinetic energy is converted into the oil phase kinetic energy through the reversed water injection, the plane flow line is regulated and controlled, and the fracture-cave unit is balancedly developed.

[0026] Preferably, step S4 is specifically as follows: after the regulation and control, the unit kinetic energy, pressure energy and potential energy change, the fracture-cave reservoir development fluid potential simulation software is used for the characterization, the unit fluid potential is calculated again, the development fluid potential regulation and control effect is analyzed, and the balanced development of the reservoir is realized.

[0027] Then, the present application provides a mathematical model of the development fluid potential of the fracture-cave reservoir.

[0028] Preferably, the fluid potential mathematical model of the development fluid potential is as follows: Wherein, Φ is the fluid potential energy, J / m 3 ; ρ is the fluid density, kg / m 3 ; g is the gravity acceleration, m / s 2; z is the depth of the sea, m; p is the reservoir pressure, Pa; v is the fluid seepage velocity, m / s, sigma is the interfacial tension, mN / m; theta is the wetting angle; r is the reservoir pore throat radius, m.

[0029] Furthermore, the present application provides a three-dimensional model of developing fluid potential obtained by the above method.

[0030] Finally, the present application provides the application of the above mathematical model and / or three-dimensional model of developing fluid potential in the balanced development method of fracture-vug reservoir.

[0031] Compared with the prior art, the present application has the following beneficial effects:

[0032] 1. Based on the actual research and practice in the laboratory and the field, the present application proposes the concept of developing fluid potential of fracture-vug reservoir, and provides a new method for balanced development of fracture-vug reservoir based on the development concept of "reducing water potential and increasing oil potential".

[0033] 2. Compared with the method of only considering pressure field for regulation and control in the field at present, the present application uses the theory of developing fluid potential to guide the development and regulation of fracture-vug reservoir, and the index consideration factors are more comprehensive, and the balanced development effect is better.

[0034] 3. The method of the present application directly guides the balanced development of flow potential by using the regulation and control method of "lifting, controlling, guiding and disturbing" for the first time. BRIEF DESCRIPTION OF DRAWINGS

[0035] Figure 1 is the flow chart of the method for balanced development of fracture-vug reservoir of the embodiment of the present application.

[0036] Figure 2 is the schematic diagram of the method for balanced regulation and control of well group development fluid potential of the present application.

[0037] Figure 3 is the comprehensive regulation and control principle diagram of fracture-vug reservoir old area unit development fluid potential.

[0038] Figure 4 is the simulation diagram of well group liquid lifting and drainage regulation and control energy conversion process. DETAILED DESCRIPTION

[0039] The following non-limiting examples can provide a more complete understanding of the application to one of ordinary skill in the art, but are not intended to limit the application in any way. The following examples are merely illustrative of the scope of the application as claimed and, therefore, should not be taken to limit the application in any way. Various modifications and alterations to the application can be made by those skilled in the art within the scope of the application, without departing from the scope of the application. When a range of values is given, it is to be understood that every intervening value, to the left and right of the range, as well as the range itself, is contemplated. Unless otherwise stated, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the application belongs.

[0040] The application is further described in the following specific examples.

[0041] Figure 1 A flow chart of a method for balanced development of a fracture-vug reservoir according to an embodiment of the application is shown. According to the dynamic characteristics of the well group and the fracture-vug structure characteristics, fluid potential representation is carried out using analytical methods and numerical simulation methods. Comprehensive analysis is carried out in combination with the water body multiple of the well group, the connectivity degree, the development mode, the oil-water ratio and the liquid production rate, and the debugging means of lifting control disturbance are used to make the development fluid potential of the well group tend to be balanced.

[0042] Example 1

[0043] A method for balanced development of a fracture-vug reservoir, comprising the steps of:

[0044] S1, according to Bernoulli theory, in combination with the fluid flow characteristics in the development process of the fracture-vug reservoir, a mathematical model of the development fluid potential of the fracture-vug reservoir is established; wherein the total mechanical energy possessed by the unit volume of fluid in the reservoir relative to the datum plane becomes the development fluid potential. Taking the unit volume of fluid as the object, the mathematical model of the development fluid potential of the reservoir is:

[0045]

[0046] In formula (1):

[0047] Φ is the fluid potential energy, J / m 3 ; ρ is the fluid density, kg / m 3 ; g is the gravitational acceleration, m / s 2 ; z is the altitude depth, m; p is the reservoir pressure, Pa; v is the fluid seepage velocity, m / s; is the change of the fluid seepage velocity along the y direction, s -1 ; η is the viscosity coefficient, mPa·s; σ is the interfacial tension, mN / m; θ is the wetting angle; r is the reservoir pore throat radius, m; Q is other energy loss.

[0048] For the fracture-cave type reservoir, the mathematical model of the development fluid potential of the fracture-cave type reservoir is:

[0049]

[0050] In formula (2):

[0051] Φ is the fluid potential energy, J / m 3 ; ρ is the fluid density, kg / m 3 ; g is the gravity acceleration, m / s 2 ; z is the altitude depth, m; p is the reservoir pressure, Pa; v is the fluid seepage velocity, m / s, σ is the interfacial tension, mN / m; θ is the wetting angle; r is the reservoir pore throat radius, m.

[0052] The development fluid potential of the fracture-cave type reservoir refers to the total mechanical energy possessed by the unit volume of fluid in the reservoir relative to the datum surface during the development of crude oil, including potential energy, pressure energy, kinetic energy, interfacial energy and viscous force energy, wherein the potential energy, pressure energy and kinetic energy are the main energy components; and the energy components are different at different stages, and the energy components can be converted with each other, thereby laying a theoretical foundation for the balanced regulation of the fluid potential.

[0053] S2, the mathematical model of the development fluid potential of the fracture-cave type reservoir is used to characterize the development fluid potential of the fracture-cave type reservoir: according to the dynamic characteristics of the well group and the fracture-cave structure characteristics, the analytical method and the numerical simulation method are used to develop the development fluid potential characterization.

[0054] Specifically, first, based on the software engineering thought, the fracture-cave type reservoir development fluid potential calculation software (fracture-cave type reservoir development fluid potential simulation software) based on the numerical simulation results is developed based on the fracture-cave type reservoir development fluid potential mathematical model and the characterization method theoretical algorithm;

[0055] Secondly, the field oil well production dynamic and static data are collected, including reservoir geological characteristics, pressure measurement data, oil well production dynamic data and stimulation measures, and the prepared fracture-cave type reservoir development fluid potential characterization software is used to characterize the reservoir fluid potential, calculate the development fluid potential values of the target unit at different times, analyze the distribution characteristics of the high fluid potential area and the low fluid potential area of the unit, determine the main influencing factors of the fluid potential field change, and evaluate the oil increment potential of the fracture-cave unit regulation and control.

[0056] Combined with the water body multiple, the connectivity degree, the development mode, the oil-water ratio and the liquid production rate of the well group, the debugging means of leading control and disturbance are used to make the development fluid potential of the well group tend to be balanced:

[0057] S3, based on the fracture-cave characterization and the connectivity relationship characterization, the development fluid potential of the fracture-cave type reservoir is balanced and regulated, and a three-dimensional model of the development fluid potential of the fracture-cave unit at the current development stage is established;

[0058] Specifically, such as Figure 2 As shown, by combining the methods of lifting, controlling, guiding, and disturbing, the energy of various reservoir fluids is transformed in a favorable manner, the flow potential is balanced, and the balanced exploitation of fracture-cavity units is achieved.

[0059] The above-mentioned balanced regulation methods include: (1) Fluid lifting and diversion: Based on the clear source of water invasion and the direction of water inflow, select high water-cut oil wells along the water invasion path to slow down the scale and intensity of water invasion, reduce the water cut rise rate of the affected oil wells, and improve the development effect of oil wells; (2) Fluid control and water suppression: By controlling the fluid in the high water potential zone, the water phase kinetic energy is reduced, the bottom water is raised evenly, the water pressure energy and kinetic energy are converted into reservoir pressure energy, and the reservoir oil-water fluid potential energy is rationally utilized; (3) Water diversion for oil driving: For well groups with uneven effects of one injection and multiple production, the main water channel oil wells are controlled to reduce fluid control and secondary channels are used to lift the fluid, change the inherent water line, convert the water injection kinetic energy into oil kinetic energy, start the unused remaining oil, and improve the quality of water driving; (4) Fluid disturbance and oil enhancement: For multiple interconnected channels between multi-well units, the water phase kinetic energy is converted into oil phase kinetic energy through water reversal, etc., and the plane streamline is regulated to achieve balanced utilization of fractured and cavern units. Figure 3 Schematic diagram of the principle of integrated regulation of fluid potential in old unit development of fractured-vuggy oil reservoirs ( Figure 3 In this diagram, Φ1 represents the fluid potential at the bottom of the drainage well, and Φ2 represents the fluid potential at the bottom of the oil well; Z1 represents the depth of the drainage well, and Z2 represents the depth of the oil well. Fluid potential difference is the fundamental reason for fluid movement in the reservoir. From the perspective of energy conservation and transformation in the reservoir system during development, this study uses numerical simulation methods to calculate the fluid potential values ​​at different times and locations during reservoir development. Through human intervention such as adjusting work schedules and artificial energy supplementation (water or gas injection), the goal of regulating the reservoir flow field and rationally utilizing energy can be achieved, providing a decision-making basis for the balanced development of fracture-cavity units in old reservoir areas.

[0060] Figure 4 This is a simulation diagram of the energy conversion process for fluid extraction and drainage regulation in well groups. This invention is applied to the typical TH12349 well group in the Tahe Oilfield. Wells TH12271 and TH12338 are located at the forefront of the water intrusion path. Bottom water intrudes into well TH12349 through wells TH12271 and TH12338. The bottom water pressure energy in wells TH12271 and TH12338 is excessively high, requiring pressure reduction. By adopting a fluid extraction and flow potential reduction regulation method, the oil well discharge rate in wells TH12271 and TH12338 is increased, the bottom water pressure energy is reduced, and the intrusion of bottom water into the oil well is slowed, thereby reducing the water cut in well TH12349 and increasing oil well productivity.

[0061] S4. Recharacterize the development fluid potential of the regulated fracture-vuggy reservoir.

[0062] Specifically, after the regulation, the unit kinetic energy, pressure energy and potential energy change, and the fluid potential simulation software for the development of the fractured-vuggy reservoir is used for characterization, the unit fluid potential is calculated again, the regulation effect of the development fluid potential is analyzed, and balanced development of the reservoir is realized.

[0063] Through the above method, the regulation method of "extraction, control, introduction and disturbance" is used to realize the balanced development of the fractured-vuggy reservoir, realize the balanced adjustment of the fluid potential, reduce the occurrence of water channeling and violent water flooding, and significantly improve the development effect of the fractured-vuggy reservoir.

[0064] In the traditional regulation method of the fractured-vuggy reservoir, only the distribution of the pressure field is considered, the influence of other energy in the balanced development is ignored, and a systematic development fluid potential regulation process and means are not formed in the early stage, and the actual field implementation of the balanced regulation cannot be realized.

[0065] Finally, it should be noted that the above content is only used to illustrate the technical solutions of the present application, and is not a limitation on the protection scope of the present application. Simple modifications or equivalent replacements of the technical solutions of the present application made by those skilled in the art do not deviate from the essence and scope of the present application.

Claims

1. A method for balanced development of fractured-vuggy reservoirs, characterized in that, Including the following steps: Step S1: Based on Bernoulli's theory and combined with the fluid flow characteristics during the development of fractured-vuggy reservoirs, establish a mathematical model of the development fluid potential of fractured-vuggy reservoirs; wherein, the total mechanical energy of a unit volume of fluid in the reservoir relative to the reference surface is called the development fluid potential. Step S2: Characterize the development fluid potential of fractured-vuggy reservoirs based on a mathematical model of the development fluid potential. Step S3: Based on the characterization of fractures and vulcanization and the representation of connectivity, the development fluid potential of fractured-vulcanized reservoirs is balanced and regulated, and a three-dimensional model of the development fluid potential of the fractured-vulcanization unit at the current development stage is established. Step S4: Recharacterize the development fluid potential of the regulated fractured-vuggy reservoir.

2. The method according to claim 1, characterized in that, In step S1, the mathematical model for the development fluid potential of the reservoir is: In equation (1): Φ is the fluid potential energy, J / m 3 ρ is the fluid density, kg / m³ 3 g is the acceleration due to gravity, in m / s². 2 z is the elevation depth, m; p is the reservoir pressure, Pa; v is the fluid seepage velocity, m / s; Let s be the variation of fluid seepage velocity along the y-direction. -1 η is the viscosity coefficient, mPa·s; σ is the interfacial tension, mN / m; θ is the wetting angle; r is the reservoir pore throat radius, m; Q is other energy losses.

3. The method according to claim 2, characterized in that, The mathematical model for the development fluid potential of the reservoir is the same as that for fractured-vuggy reservoirs, and is as follows: In equation (2): Φ is the fluid potential energy, J / m 3 ρ is the fluid density, kg / m³ 3 g is the acceleration due to gravity, in m / s². 2 z is the elevation depth, m; p is the reservoir pressure, Pa; v is the fluid seepage velocity, m / s; σ is the interfacial tension, mN / m; θ is the wetting angle; r is the reservoir pore throat radius, m.

4. The method according to claim 1, characterized in that, Step S2 is as follows: First, we developed a mathematical model and characterization algorithm for the development fluid potential of fractured-vuggy reservoirs, and then developed software for calculating the development fluid potential of fractured-vuggy reservoirs based on numerical simulation results. Secondly, collect dynamic and static data on well production in the field, including reservoir geological characteristics, pressure measurement data, well production dynamic data and production enhancement measures. Then, use the developed software for characterizing the development fluid potential of fractured-vuggy reservoirs to characterize the reservoir fluid potential, calculate the development fluid potential value of the target unit at different times, analyze the distribution characteristics of the high fluid potential area and low fluid potential area of ​​the unit, identify the main influencing factors of fluid potential field changes, and evaluate the potential for oil enhancement through regulation of fractured-vuggy units.

5. The method according to claim 1, characterized in that, In step S3, the method for balancing and regulating the development fluid potential of fractured-vuggy reservoirs is as follows: by combining lifting, control, diversion, and disturbance methods, the various energies of the reservoir fluid are transformed in a favorable manner to balance the flow potential and achieve balanced exploitation of fractured-vuggy units.

6. The method according to claim 5, characterized in that, In step S3, the method for balancing and regulating the development fluid potential of fractured-vuggy reservoirs includes the following steps: (1) Fluid lifting and diversion: Based on clarifying the source of water invasion and the direction of water inflow, select high water-cut wells along the water invasion path to slow down the scale and intensity of water invasion, reduce the water cut rise rate of the affected wells, and improve the development effect of the wells; (2) Fluid control and water suppression: Control the fluid in the high water potential zone to reduce the kinetic energy of the water phase, ensure the balanced rise of the bottom water, convert the pressure energy and kinetic energy of the water body into the pressure energy of the reservoir, and make reasonable use of the potential energy of the oil-water fluid in the reservoir; (3) Water diversion for oil driving: For well groups with uneven effects of one injection and multiple production, reduce the fluid control of the main water channel wells and supplement the fluid lifting in the secondary channels to change the inherent water line, convert the kinetic energy of the injected water into the kinetic energy of the oil, start the unused remaining oil, and improve the quality of water driving; (4) Fluid disturbance and oil enhancement: For multiple interconnected channels between multi-well units, convert the kinetic energy of the water phase into the kinetic energy of the oil phase by reversing the injection direction, regulate the plane streamline, and realize the balanced utilization of fractured-vuggy units.

7. The method according to claim 1, characterized in that, Step S4 specifically involves: after regulation, the unit's kinetic energy, pressure energy, and potential energy change. The changes are characterized using a fractured-vuggy reservoir development fluid potential simulation software. The unit's fluid potential is then recalculated, and the effect of the development fluid potential regulation is analyzed to achieve balanced reservoir development.

8. A mathematical model for the development fluid potential of a fractured-vuggy reservoir, characterized in that, The mathematical model for the development of fluid potential is as follows: Where: Φ is the fluid potential energy, J / m 3 ρ is the fluid density, kg / m³ 3 g is the acceleration due to gravity, in m / s². 2 z is the elevation depth, m; p is the reservoir pressure, Pa; v is the fluid seepage velocity, m / s; Let s be the variation of fluid seepage velocity along the y-direction. -1 η is the viscosity coefficient, mPa·s; σ is the interfacial tension, mN / m; θ is the wetting angle; r is the reservoir pore throat radius, m.

9. A three-dimensional model for developing fluid potential, characterized in that, Obtained by the method described in any one of claims 1-7.

10. The application of the mathematical model of the development fluid potential as described in claim 8 or the three-dimensional model as described in claim 9 in the balanced development method of fractured-vuggy reservoirs.

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