Oil and gas reservoir fracturing fluid evaluation device and evaluation method based on three-dimensional simulation

Abstract

The invention belongs to the technical field of oil and gas field exploration and development, and discloses an oil and gas reservoir fracturing fluid evaluation device and method based on three-dimensional simulation. The evaluation device comprises a reaction kettle barrel, a pressure adjusting assembly, a temperature adjusting assembly, a fluid supply assembly and a collecting barrel; the cylinder body and the cylinder cover are enclosed to form a sealed space, and the pressure adjusting assembly and the temperature adjusting assembly are respectively used for adjusting the pressure and the temperature in the reaction kettle cylinder; the liquid supply assembly comprises a liquid storage cylinder and a first fluid pump, and the first fluid pump can pump liquid stored in the liquid storage cylinder into the reaction kettle cylinder; the collecting barrel is connected with the reaction kettle barrel and can receive oil gas seeping from the reaction kettle barrel. The whole evaluation device simulates the process that the fracturing fluid is pressed into the oil and gas reservoir, the adaptability of the fracturing fluid and the oil and gas reservoir can be evaluated according to the simulation result, and the evaluation precision is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of oil and gas field exploration and development, and in particular to an oil and gas reservoir fracturing fluid evaluation device and evaluation method based on three-dimensional simulation. Background Art

[0002] In the field of oil exploration and development, the fracturing technology of oil and gas reservoirs is one of the key technologies to improve the productivity of oil and gas wells and increase the recovery rate. The evaluation and optimization of fracturing fluids for oil and gas reservoirs is a current research hotspot. Traditional fracturing fluid evaluation methods are mainly based on empirical analysis or laboratory measurements. They are unable to evaluate the adaptability of fracturing fluids according to the complex fluid and fracture distribution characteristics of oil and gas reservoirs, and cannot meet the needs of actual development. Summary of the invention

[0003] One of the purposes of the present invention is to provide an oil and gas reservoir fracturing fluid evaluation device based on three-dimensional simulation, which can simulate the process of fracturing fluid entering the oil and gas reservoir, so as to evaluate the adaptability of the fracturing fluid, oil and gas reservoir fractures and mineral oil and gas according to the process.

[0004] To achieve this object, the present invention adopts the following technical solutions:

[0005] The oil and gas reservoir fracturing fluid evaluation device based on three-dimensional simulation includes:

[0006] A reaction kettle cylinder, wherein the reaction kettle cylinder comprises a cylinder body and a cylinder cover, wherein the cylinder body and the cylinder cover enclose a sealed space;

[0007] A pressure regulating assembly, used for regulating the pressure in the reactor cylinder;

[0008] A temperature regulating component, used for regulating the temperature inside the reactor cylinder;

[0009] A liquid supply assembly, the liquid supply assembly comprising a liquid storage cylinder and a first fluid pump, the first fluid pump being capable of pumping the liquid stored in the liquid storage cylinder into the reactor cylinder;

[0010] The collecting cylinder is connected to the reaction kettle cylinder and can receive the fluid seeping out of the reaction kettle cylinder.

[0011] Preferably, the liquid supply assembly further comprises a first metering cylinder, and the first metering cylinder is arranged between the first fluid pump and the reactor cylinder.

[0012] Preferably, the liquid supply assembly further comprises a second metering cylinder, and the second metering cylinder is connected to the first fluid pump, the first metering cylinder and the reactor cylinder.

[0013] Preferably, a third metering cylinder is further included, and the third metering cylinder is connected to the reaction kettle cylinder.

[0014] Preferably, the first metering cylinder, the second metering cylinder and the third metering cylinder are connected to the first fluid pump via a first six-way valve, and the first metering cylinder, the second metering cylinder and the third metering cylinder are connected to the reactor cylinder via a second six-way valve.

[0015] Preferably, the pressure regulating assembly comprises a second fluid pump and a first pressure gauge, the second fluid pump is connected to the reaction kettle barrel, and the first pressure gauge can display the pressure of the gas pumped into the reaction kettle barrel by the second fluid pump.

[0016] Preferably, the temperature regulating assembly comprises a heating element, a temperature sensor and a constant temperature box, wherein the temperature sensor is used to monitor the temperature inside the reaction kettle barrel, and the reaction kettle barrel is located inside the constant temperature box.

[0017] Another object of the present invention is to provide a fracturing fluid evaluation method, which is implemented by means of any of the above-mentioned oil and gas reservoir fracturing fluid evaluation devices based on three-dimensional simulation, and mainly includes the following steps:

[0018] S1. According to the physical characteristics of oil and gas reservoirs, simulated cores are manufactured using three-dimensional simulation technology;

[0019] S2. placing the simulated core in a reactor cylinder, injecting the fracturing fluid to be evaluated into the simulated core, and evaluating the adaptability of the fracturing fluid to the simulated core according to the dynamic simulation results.

[0020] Preferably, in step S2, the exterior of the simulated core is wrapped with epoxy resin.

[0021] Preferably, step S1 further comprises the following steps:

[0022] Determine the shape and distribution of faults and fractures in the reservoirs and the porosity and permeability of the reservoirs based on the static data of the reservoirs, so as to establish the geological model of the reservoirs;

[0023] According to the dynamic production data of oil and gas reservoirs, determine the distribution of oil, gas and water saturation in the reservoirs, and establish a numerical simulation model of the reservoirs;

[0024] The simulated cores were manufactured according to similar principles.

[0025] Beneficial effects of the present invention: The oil and gas reservoir fracturing fluid evaluation device and evaluation method based on three-dimensional simulation in the present invention utilizes a pressure regulating component and a temperature regulating component to regulate the temperature and pressure in the reactor barrel, and utilizes the reactor barrel to simulate the formation environment of the oil and gas reservoir in the actual production process; utilizes a liquid supply component to inject fracturing fluid into the simulated core to simulate the process of injecting fracturing fluid into the oil and gas reservoir during actual construction; utilizes a collecting barrel to receive the fluid seeping from the reactor barrel to simulate the fluid mineral collection process. By observing the simulation results, the adaptability of the fracturing fluid and the oil and gas reservoir can be evaluated, providing favorable technical support for the subsequent development of oil and gas wells. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 Schematic diagram of the structure of an oil and gas reservoir fracturing fluid evaluation device based on three-dimensional simulation in an embodiment of the present invention;

[0027] Figure 2 It is a schematic diagram of the structure of the reaction kettle cylinder in an embodiment of the present invention.

[0028] In the figure:

[0029] 1. Liquid storage cylinder; 2. First fluid pump; 3. Constant temperature box; 4. Second six-way valve; 5. Temperature sensor; 6. First pressure gauge; 7. Second fluid pump; 8. First metering cylinder; 9. Second metering cylinder; 10. First six-way valve; 11. Third metering cylinder; 12. Second pressure gauge; 13. Simulated core; 14. Reactor cylinder; 141. Cylinder body; 142. Cylinder cover; 143. Sealing gasket; 144. Quick connector; 15. Collecting cylinder. DETAILED DESCRIPTION

[0030] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0031] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0033] In the description of this embodiment, the terms "upper", "lower", "left", "right" and other directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplification of operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operate in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0034] The present invention proposes an oil and gas reservoir fracturing fluid evaluation device based on three-dimensional simulation, which is used to simulate the process of fracturing fluid entering the oil and gas reservoir, so as to evaluate the adaptability of the fracturing fluid. Fracturing fluid is a general term. In the fracturing process, according to the role played in different stages, the fracturing fluid is divided into pre-fluid, sand-carrying fluid and displacement fluid, wherein the pre-fluid is used to break the formation and create cracks of a certain geometric size, the sand-carrying fluid is used to bring the proppant (generally ceramsite or quartz sand) into the cracks formed by the pre-fluid, and the role of the displacement fluid is to replace all the sand-carrying fluid in the wellbore into the cracks. The evaluation device mainly simulates a process of fracturing fluid that exists as a sand-carrying fluid entering the oil and gas reservoir.

[0035] like Figure 1-Figure 2 What is shown is an oil and gas reservoir fracturing fluid evaluation device based on three-dimensional simulation proposed in an embodiment of the present invention, the evaluation device includes a reactor barrel 14, a liquid supply component, a pressure regulating component, a temperature regulating component and a collecting barrel 15, wherein the reactor barrel 14 includes a barrel body 141 and a barrel cover 142, the barrel body 141 and the barrel cover 142 enclose a sealed space, the pressure regulating component and the temperature regulating component are both connected to the reactor barrel 14 to respectively adjust the pressure and temperature in the reactor barrel 14, the liquid supply component and the collecting barrel 15 are also connected to the reactor barrel 14, the liquid supply component includes a liquid storage barrel 1 and a first fluid pump 2, the first fluid pump 2 can pump the liquid stored in the liquid storage barrel 1 into the reactor barrel 14, specifically, a horizontal flow pump can be used, the reactor barrel 14 has a built-in simulated core 13, and the collecting barrel 15 can receive the fluid contained in the simulated core 13 that seeps out from the reactor barrel 14.

[0036] The oil and gas reservoir fracturing fluid evaluation device based on three-dimensional simulation in this embodiment can perform dynamic physical simulation on the whole process of injecting fracturing fluid into a wellbore that has formed a fracturing gap, and determine the compatibility of the fracturing fluid with the oil and gas reservoir based on the simulation results. Among them, the temperature and pressure in the reactor barrel 14 are regulated by the pressure regulating component and the temperature regulating component, and the reactor barrel 14 is used to simulate the formation environment of the oil and gas reservoir in the actual production process; the collecting barrel 15 is used to receive the oil and gas seeping from the reactor barrel 14 to simulate the oil and gas collection process; the liquid supply component is used to inject fracturing fluid into the simulated core 13 to simulate the process of injecting fracturing fluid into the oil and gas reservoir during actual construction.

[0037] refer to Figure 1 As shown, in order to quantitatively add fracturing fluid to the reactor barrel 14, the liquid supply assembly also includes a first metering barrel 8, which is arranged between the first fluid pump 2 and the reactor barrel 14, and is used to measure a predetermined amount of liquid. The first fluid pump 2 can first pump a predetermined amount of liquid into the first metering barrel 8, and then pump the quantitative liquid in the first metering barrel 8 to the reactor barrel 14.

[0038] In this embodiment, the liquid supply assembly also includes a second metering cylinder 9, which is connected to the first fluid pump 2, the first metering cylinder 8, and the reactor cylinder 14. The liquids in the first metering cylinder 8 and the second metering cylinder 9 can be mixed to form a fracturing fluid, and then pumped into the reactor cylinder 14 by the first fluid pump 2, so that the configuration of the fracturing fluid and the evaluation of the fracturing fluid are integrated together, thereby improving the efficiency of the fracturing fluid evaluation. Exemplarily, the first metering cylinder 8 is used to measure a predetermined amount of guar gum (the main component of the fracturing fluid), and the second metering cylinder 9 is used to measure a predetermined amount of additives, which can be a liquid containing a proppant such as fracturing sand or a nano-displacement agent, etc., which is the key to determining the performance of the fracturing fluid.

[0039] It can be understood that the amount of fracturing fluid injected into the cracks of the simulated core 13 must be excessive. Therefore, the oil and gas reservoir fracturing fluid evaluation device based on three-dimensional simulation in this embodiment also includes a third metering cylinder 11, which is connected to the reactor cylinder 14. The third metering cylinder 11 can recover the fracturing fluid that flows back during the injection of the fracturing fluid into the simulated core 13, and this can be used to check the sand carrying capacity of the fracturing fluid.

[0040] Illustratively, the first metering cylinder 8, the second metering cylinder 9 and the third metering cylinder 11 are connected to the first fluid pump 2 through the first six-way valve 10, and the first metering cylinder 8, the second metering cylinder 9 and the third metering cylinder 11 are connected to the reactor cylinder 14 through the second six-way valve 4. The first fluid pump 2 can mix the liquid in the first metering cylinder 8 and the second metering cylinder 9 and pump them into the reactor cylinder 14 to complete the preparation of the fracturing fluid.

[0041] Optionally, the liquid supply assembly also includes a second pressure gauge 12, which is arranged between the second six-way valve 4 and the reactor barrel 14, and is used to measure the pressure of the liquid entering the reactor barrel 14. In actual operation, the time and pressure of the fracturing fluid injected into the simulated core 13 can be adjusted by adjusting the pump pressure and speed of the first fluid pump 2, thereby optimizing the injection pressure, injection rate, injection time and other parameters of the fracturing fluid.

[0042] In this embodiment, the pressure regulating assembly includes a second fluid pump 7 and a first pressure gauge 6. The second fluid pump 7 is connected to the reactor barrel 14 and can inflate the reactor barrel 14 so that the pressure in the reactor barrel 14 is the same as the formation environment pressure of the oil and gas reservoir. The first pressure gauge 6 displays the gas pressure pumped into the reactor barrel 14 by the second fluid pump 7. Optionally, the second fluid pump 7 is a hand pump.

[0043] refer to Figure 2 As shown, the temperature regulating assembly includes a heating element and a temperature sensor 5, the heating element is used to heat the reactor cylinder 14, and the temperature sensor 5 is used to monitor the temperature inside the reactor cylinder 14. Optionally, the heating element is a resistance wire, and the resistance wire is evenly laid on the bottom of the inner side of the cylinder 141. Furthermore, in order to maintain the constant temperature effect and reduce the working time of the resistance wire, the temperature regulating assembly also includes a closed constant temperature box 3, and the first metering cylinder 8, the second metering cylinder 9, the third metering cylinder 11, the reactor cylinder 14 and the collecting cylinder 15 are all located inside the constant temperature box 3.

[0044] refer to Figure 2 As shown, the cylinder 141 is flange-connected with the cylinder cover 142. In order to ensure the sealing effect between the cylinder 141 and the cylinder cover 142, the reactor cylinder 14 also includes a sealing gasket 143, which is arranged between the cylinder 141 and the cylinder cover 142. In order to facilitate the connection between the cylinder 141 and the first metering cylinder 8, the second metering cylinder 9, the third metering cylinder 11 and the collecting cylinder 15, a plurality of quick connectors 144 are arranged on the side wall of the cylinder 141. The first metering cylinder 8, the second metering cylinder 9, the third metering cylinder 11 and the collecting cylinder 15 are all connected to the quick connector 144 through a connecting pipe, thereby realizing the connection with the cylinder 141.

[0045] Another embodiment of the present invention further provides a fracturing fluid evaluation method, which is implemented by means of the above-mentioned oil and gas reservoir fracturing fluid evaluation device based on three-dimensional simulation, and mainly includes the following steps:

[0046] S1. According to the physical characteristics of the oil and gas reservoir, such as fracture distribution, fluid distribution, porosity and permeability, a simulated core 13 is manufactured using three-dimensional simulation technology. This step is further divided into the following steps:

[0047] S11. Determine the morphology and distribution of faults and fractures in the oil and gas reservoirs and the porosity and permeability of the oil and gas reservoirs based on the static data of the oil and gas reservoirs, so as to establish a geological model of the oil and gas reservoirs. The static data include but are not limited to geological data, seismic data, logging data, core data and fluid data, etc. The above data can be obtained through one or more methods such as distributed optical fiber temperature measurement, distributed acoustic wave sensing, fracture injection diagnostic tests, microseismic, etc., and the geological model can be modeled using Petrel software.

[0048] It is understandable that the fractures include both natural fractures in oil and gas reservoirs and artificial fractures formed by pre-placed fracturing fluid.

[0049] S12. According to the dynamic production data of the oil and gas reservoir, determine the distribution of the three-phase saturation of oil, gas and water in the oil and gas reservoir, and establish a numerical simulation model of the oil and gas reservoir. The dynamic production data can be selected from the production report of the oil field, and the production report contains dynamic data such as daily oil, gas, water, pressure, etc. The numerical simulation model is also established using Petrel software, and the established model is a black oil model or a component model.

[0050] S13. According to the similarity criterion, the simulated rock core 13 is manufactured. During the manufacturing process, the common typical crack morphology can be used to simplify the distribution and morphology of the cracks, thereby reducing the difficulty of manufacturing the simulated rock core 13. In the common typical crack morphology, a single crack is generally a plane, which can be perpendicular, parallel or at a certain angle to the outer surface of the simulated rock core 13; the cracks can be parallel, perpendicular or intersecting at a certain angle to each other, and the number of cracks inside the simulated rock core 13 is generally no more than 10.

[0051] Exemplarily, the simulated core 13 is formed by mixing sand, soil, water and cementing materials and then compressing them under high pressure. It should be emphasized that one of the cracks runs through the outer surface of the simulated core 13 to allow fracturing fluid and oil and gas to enter and exit (equivalent to the wellbore).

[0052] S2, placing the simulated rock core 13 in the reactor barrel 14 to form a sealed space, making the temperature and pressure inside the reactor barrel 14 consistent with the temperature and pressure of the formation where the oil and gas reservoir is located through the temperature regulating component and the pressure regulating component, and then injecting the fracturing fluid to be evaluated into the simulated rock core 13 by using the first fluid pump 2, and evaluating the adaptability of the fracturing fluid to the oil and gas reservoir according to the dynamic simulation results. The adaptability includes but is not limited to the sand carrying capacity, flowback capacity and absorption capacity of the fracturing fluid to the fluid in the oil and gas reservoir under the conditions of the oil and gas reservoir simulated by the simulated rock core 13.

[0053] For example, to evaluate the ability of fracturing fluid to absorb fluid in oil and gas reservoirs, resistivity testing or nuclear magnetic resonance technology can be used to obtain the changes in oil, gas, and water saturation at the test point of the simulated core 13, and then obtain the changes in fluid distribution inside the simulated core 13. Among them, the resistivity test can monitor the changes in oil and water saturation at the test point in real time. When using the resistivity test, it is necessary to fill silicone oil inside the reactor barrel 14 to play an insulating role. The nuclear magnetic resonance technology can reflect the scale of hydrogen-containing fluids and obtain relaxation parameters T1, T2, and D by inverting the attenuation signal. Due to the difference in oil and water diffusion coefficients, the D-T2 two-dimensional distribution map can distinguish between oil and water fluids, and then analyze the fluid distribution and migration rules, and then evaluate the adaptability of the fracturing fluid through performance, which is more accurate than the resistivity test.

[0054] The sand carrying capacity of the fracturing fluid can be evaluated by checking the amount of proppant in the third metering cylinder 11 , or by checking the amount of proppant remaining in the simulated core 13 after the test.

[0055] To evaluate the flowback capacity of the fracturing fluid, the ratio of oil and gas to fracturing fluid in the collecting tube 15 can be checked.

[0056] In addition, during the fracturing fluid injection process, the injection pressure, injection rate, injection time and other parameters of the fracturing fluid can also be adjusted to evaluate the impact of the above parameters on the sand carrying capacity and flowback capacity of the fracturing fluid.

[0057] In order to prevent the fluid in the simulated core 13 from flowing out in an unexpected manner and affecting the evaluation accuracy, the simulated core 13 is placed in front of the reactor cylinder 14, and its outer surface is coated with epoxy resin to ensure that the fluid in the simulated core 13 can only flow out of the cracks under the infiltration of the fracturing fluid.

[0058] The above evaluation method uses three-dimensional simulation technology to simulate the faults, fracture distribution and fluid distribution in the oil and gas reservoir and make a simulated core 13, and then simulates the process of fracturing fluid being injected into the oil and gas reservoir to inject the fracturing fluid into the simulated core 13. The fracturing fluid evaluation carried out according to the above simulation results is more accurate, which provides guidance for the subsequent exploitation of oil and gas reservoirs under similar formation conditions, and is conducive to improving the production capacity and recovery rate of oil and gas wells.

[0059] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. An oil and gas reservoir fracturing fluid evaluation device based on three-dimensional simulation, characterized in that: include: A reaction kettle barrel (14), wherein the reaction kettle barrel (14) comprises a barrel body (141) and a barrel cover (142), wherein the barrel body (141) and the barrel cover (142) enclose a sealed space; A pressure regulating assembly, used for regulating the pressure in the reaction vessel cylinder (14); A temperature regulating component, used for regulating the temperature inside the reaction kettle barrel (14); A liquid supply assembly, the liquid supply assembly comprising a liquid storage cylinder (1) and a first fluid pump (2), the first fluid pump (2) being capable of pumping the liquid stored in the liquid storage cylinder (1) into the reaction kettle cylinder (14); The collecting cylinder (15) is connected to the reaction kettle cylinder (14), and the collecting cylinder (15) can receive the fluid seeping out from the reaction kettle cylinder (14).

2. The oil and gas reservoir fracturing fluid evaluation device based on three-dimensional simulation according to claim 1, characterized in that: The liquid supply assembly further comprises a first metering cylinder (8), wherein the first metering cylinder (8) is arranged between the first fluid pump (2) and the reaction kettle cylinder (14).

3. The oil and gas reservoir fracturing fluid evaluation device based on three-dimensional simulation according to claim 2, characterized in that: The liquid supply assembly further comprises a second metering cylinder (9), wherein the second metering cylinder (9) is connected to the first fluid pump (2), the first metering cylinder (8) and the reaction kettle cylinder (14).

4. The oil and gas reservoir fracturing fluid evaluation device based on three-dimensional simulation according to claim 3, characterized in that: It also comprises a third metering cylinder (11), wherein the third metering cylinder (11) is connected to the reaction kettle cylinder (14).

5. The oil and gas reservoir fracturing fluid evaluation device based on three-dimensional simulation according to claim 4, characterized in that: The first metering cylinder (8), the second metering cylinder (9) and the third metering cylinder (11) are connected to the first fluid pump (2) via a first six-way valve (10), and the first metering cylinder (8), the second metering cylinder (9) and the third metering cylinder (11) are connected to the reaction kettle cylinder (14) via a second six-way valve (4).

6. The oil and gas reservoir fracturing fluid evaluation device based on three-dimensional simulation according to any one of claims 1 to 5, characterized in that: The pressure regulating assembly comprises a second fluid pump (7) and a first pressure gauge (6), wherein the second fluid pump (7) is connected to the reaction kettle barrel (14), and the first pressure gauge (6) is capable of displaying the pressure of the gas pumped into the reaction kettle barrel (14) by the second fluid pump (7).

7. The oil and gas reservoir fracturing fluid evaluation device based on three-dimensional simulation according to any one of claims 1 to 5, characterized in that: The temperature regulating component comprises a heating element, a temperature sensor (5) and a constant temperature box (3). The temperature sensor (5) is used to monitor the temperature inside the reaction kettle cylinder (14). The reaction kettle cylinder (14) is located inside the constant temperature box (3).

8. A method for evaluating a fracturing fluid, characterized in that: The method is realized by using the oil and gas reservoir fracturing fluid evaluation device based on three-dimensional simulation according to any one of claims 1 to 7, and mainly comprises the following steps: S1. According to the physical characteristics of the oil and gas reservoir, a simulated core (13) is manufactured using three-dimensional simulation technology; S2. placing the simulated core (13) in a reactor cylinder (14), injecting the fracturing fluid to be evaluated into the simulated core (13), and evaluating the adaptability of the fracturing fluid to the oil and gas reservoir based on the dynamic simulation results.

9. The fracturing fluid evaluation method according to claim 8, characterized in that: In step S2, the exterior of the simulated core (13) is coated with epoxy resin.

10. The fracturing fluid evaluation method according to claim 8, characterized in that: Step S1 further comprises the following steps: Determine the shape and distribution of faults and fractures in the reservoirs and the porosity and permeability of the reservoirs based on the static data of the reservoirs, so as to establish the geological model of the reservoirs; According to the dynamic production data of oil and gas reservoirs, determine the distribution of oil, gas and water saturation in the reservoirs, and establish a numerical simulation model of the reservoirs; The simulated core (13) was manufactured according to similar principles.

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