Integrated device and method for detecting action and compatibility of shale and fluid

Abstract

The invention relates to the technical field of shale oil and gas development, and provides an integrated device and method for detecting the action and compatibility of shale and fluid, the integrated device comprises a reactor, and the reactor is internally provided with a suspension frame for fixing a shale sample; a closed cavity for containing liquid is formed in the reactor, the closed cavity is communicated with the liquid supply assembly and contains entering liquid, and the closed cavity is further communicated with the gas supply assembly and contains entering gas; the liquid supply assembly and the gas supply assembly comprise a plurality of detection sensors and are electrically connected with the control assembly, and the control assembly is used for controlling the liquid supply assembly and the gas supply assembly to work and receiving and processing detection signals of the detection sensors. According to the invention, a closed space is formed in the reactor, and the processes of imbibition simulation of gas, fracturing, acidification, imbibition and the like of liquid can be met, so that the mineral resource condition of an actual reservoir can be deduced according to the performance condition of a shale sample, a reliable reference basis is further provided for actual exploitable exploration, and a subsequent exploiting scheme can be appointed conveniently.

Description

Technical Field

[0001] The present invention relates to the technical field of shale oil and gas development, and in particular to an integrated device and method for detecting the interaction and compatibility of shale and fluid. Background Art

[0002] As an unconventional oil and gas resource, shale oil and gas has gradually become an important pillar for increasing oil and gas reserves and production. Due to the denseness of shale reservoirs, large-scale artificial transformation is usually required to achieve industrial development. Shale has a multi-scale micro-nano pore throat structure and is rich in clay minerals. During the reservoir transformation process, shale contacts with external liquids (fracturing fluids, acidizing fluids, active fluids, etc.) to undergo a series of reactions such as hydration reactions and imbibition, which directly lead to changes in the characteristics of the shale matrix and fractures, thereby affecting the return of external fluids and the discharge of oil and gas in shale reservoirs. Therefore, related research on the various reactions, imbibition, and production of shale and external fluids under simulated reservoir conditions has a guiding role in the design of on-site reservoir transformation plans, the optimization of production systems, and the improvement of recovery rates.

[0003] At present, there are two evaluation methods for shale-fluid reaction and imbibition experiments: mass method and volume method. The mass method is to calculate the imbibition degree by weighing the mass of the rock sample before and after the reaction with the fluid. The mass method reported so far is difficult to meet the actual reservoir temperature and pressure conditions and can only simulate the conditions of conventional reservoir temperature and pressure. The volume method is to conduct reaction and imbibition experiments in a device with scaled glass or transparent organic materials, and identify the volume of liquid entering or discharged by the scale. When gas or oil droplets are discharged, a large number of bubbles or small oil droplets will be formed in the channel and on the surface of the rock sample. There is a large error in the volume measurement of the amount of discharged oil or gas. Both methods have defects in use. When studying multiple continuous reactions, shale saturation, reaction, imbibition and other experiments usually require the rock samples to be treated separately first, first saturated with shale gas or shale oil, and then separately conduct subsequent multiple reactions, imbibition and other experiments, which cannot achieve integrated and multifunctional physical simulation research. In addition, for large-scale devices with multiple systems, cumbersome manual operations are prone to errors and pose safety risks.

[0004] It can be seen that there are still many problems that need to be solved in the existing shale oil and gas development. In response to the problems mentioned above, shale, especially development technology, should be optimized to achieve accurate detection and exploration of shale's gas and oil storage capacity, so as to more conveniently set up mining plans. Summary of the invention

[0005] In order to overcome at least one of the defects mentioned above, the present invention proposes an integrated device and method for detecting the interaction and compatibility of shale and fluid. By simulating a certain temperature environment and pressure environment, the chemical reaction and absorption capacity of shale and some liquid substances are detected, so that the relevant parameters of shale can be determined more conveniently to formulate subsequent shale mineral exploitation.

[0006] In order to achieve the above-mentioned purpose, the integrated device disclosed in the present invention can adopt the following technical solutions:

[0007] An integrated device for detecting the interaction and compatibility between shale and fluid comprises a reactor, wherein a suspension frame for fixing shale samples is arranged in the reactor; a closed cavity for containing liquid is formed in the reactor, the closed cavity is connected to a liquid supply component and contains the incoming liquid, and the closed cavity is also connected to a gas supply component and contains the incoming gas; the liquid supply component and the liquid supply component include a plurality of detection sensors and are electrically connected to a control component, and the control component is used to control the operation of the liquid supply component and the gas supply component and receive and process detection signals from the detection sensors.

[0008] The integrated device disclosed above can realize multiple continuous reaction processes of shale samples in the reactor, such as fracturing process, acidification process and dialysis process, etc. By completing multiple experimental operations in the reactor, it is possible to more realistically simulate and test the gas and oil storage conditions of shale in the actual environment, thereby obtaining more accurate calculation results, making it easier to infer the shale mineral deposit conditions in the actual environment and set a reasonable mining plan.

[0009] Furthermore, the structure of the reactor for carrying out multiple reaction processes can be constructed in multiple schemes, and optimization is made here and one of the feasible options is proposed: the reactor includes a container cylinder, a detachable gland assembly is provided on the container cylinder, and the gland assembly cooperates with the liquid supply assembly and the gas supply assembly to realize the delivery of liquid or gas to the container cylinder. When such a scheme is adopted, the container cylinder and the gland assembly cooperate to form a closed space, and the gland assembly can cooperate with the container cylinder through a threaded structure, a buckle structure, etc., and a seal is provided at the cooperation to form a sealing structure.

[0010] Furthermore, the structure of the gland assembly can be optimized. Here, one feasible option is proposed: the gland assembly includes a lower gland connected to the container body, and an upper gland arranged on the lower gland; the liquid supply assembly and the gas supply assembly are both matched to the lower gland, and the upper gland is matched with the suspension frame and is provided with a weighing sensor. When such a solution is adopted, the upper gland is detachably connected to the lower gland, a sealing structure is formed at the connection, and the size of the upper gland is smaller than that of the upper gland and can be removed from the upper gland separately. After the upper gland is removed, it can be used to place shale samples, and it can also be used to observe whether the setting of the weighing sensor and the shale sample is reasonable, so as to facilitate timely adjustment of abnormal conditions.

[0011] Furthermore, in the present invention, the liquid required for the experiment is injected into the reactor through the liquid supply component, and the temperature and other parameters of the liquid itself are adjusted. Its structure is not limited to a single one. Here, it is optimized and one of the feasible options is proposed: the liquid supply component includes an injection pump connected to the liquid source, the injection pump is connected to a number of storage containers for storing liquid, the storage container is connected to the reactor and delivers the liquid to the reactor; the storage container also cooperates with the heating component to achieve the heating of the liquid. When such a scheme is adopted, the injection pump obtains liquid from the liquid source and first sends it to the storage container, and then adjusts the temperature to the required value under the action of the heating component and then sends it to the reactor; the required amount of liquid can be accurately obtained through the injection pump, or a slightly excessive amount of liquid can be first obtained to the storage container, and then the liquid is accurately pumped into the reactor through components such as a metering pump.

[0012] Furthermore, in the present invention, the structure of the heating component is not limited to a single one, and an optimization is made here and one feasible option is proposed: the heating component includes an oven, and the storage containers are all placed in the oven and heated by the oven. When such a solution is adopted, the storage container is placed in the oven for baking and heating, and an electric oven can be used for heating, so that the heating temperature can be accurately controlled.

[0013] Furthermore, the gas supply assembly used in the present invention introduces the required gas into the reactor and adjusts the temperature parameters of the gas itself, etc. Its structure is not limited to a single one. Here, it is optimized and one of the feasible options is proposed: the gas supply assembly includes a gas source, which is connected to the reactor through an intake pipeline and used to introduce gas, and a booster device and a first pressure sensor are provided on the intake pipeline; the reactor is also provided with an exhaust pipeline to discharge gas to the outside, and a second pressure sensor, a back pressure pump and a back pressure valve are also provided on the exhaust pipeline. When such a scheme is adopted, gas is introduced into the reactor through the intake pipeline, during which the booster device can control the pressure of the introduced gas, and the first pressure sensor can detect the pressure value of the internal space between the reactor and the intake pipeline, and an intake valve for controlling the opening and closing of the pipeline is provided on the intake pipeline. The gas in the reactor is discharged to the outside through the exhaust pipeline, and the air pressure in the reactor can be adjusted. At the same time, the second pressure sensor is used to detect the pressure value in the connecting space between the exhaust pipeline and the reactor, and the back-pressure valve and the back-pressure pump are used to control the exhaust process of the exhaust pipeline and the reactor, which can appropriately block the exhaust and keep the pressure in the reactor stable. An exhaust valve is also provided on the exhaust pipeline to control the on-off of the pipeline.

[0014] Furthermore, when adjusting the temperature of the internal space of the reactor, the temperature adjustment can be achieved through a variety of solutions. Here, an optimization is made and one feasible option is proposed: the reactor is connected to a heating device for heating the inside of the reactor, and the reactor is also connected to a temperature sensor for detecting the temperature inside the reactor. When such a solution is adopted, the heating device can be set at the bottom of the reactor, for example, a heating coil is set; it can also be set on the side wall of the reactor and wound with a heating coil.

[0015] Furthermore, during the reaction process, the shale infiltration process will cause some bubbles to adhere to the surface, affecting the detection results of the load-bearing sensor. Therefore, it is necessary to eliminate the bubbles before measuring. There are many specific solutions, which are not limited to the only ones. Here, we optimize and propose one of the feasible options: the reactor is also connected with an ultrasonic vibration device to send ultrasonic waves to the reactor to form shale sample vibration. When such a solution is adopted, the ultrasonic waves sent by the ultrasonic vibration device can break the attached bubbles, or make the bubbles detach from the shale surface and leave the liquid, thereby improving the accuracy of the measurement results.

[0016] The above content explains the integrated detection device, and the present invention also provides a corresponding detection method, which is explained in the following content.

[0017] A method for detecting the interaction and compatibility between shale and fluid, using the above-mentioned device, comprises:

[0018] Check the air tightness of the reactor and perform subsequent operations when the air tightness requirements are met;

[0019] The shale sample to be tested is placed inside the reactor, and gas is introduced into the reactor to make the gas pressure and temperature inside the reactor reach the set conditions, so that the shale sample absorbs the gas within the set time;

[0020] A set amount of liquid is introduced into the reactor, and the weight change of the shale sample after the liquid is introduced is calculated, and the imbibition mass and exhaust gas volume of the shale sample are calculated.

[0021] The above disclosed method provides corresponding reaction gas and reaction liquid to simulate the situation of shale in the actual reservoir environment by maintaining the airtightness inside the reaction gas, so that the shale geological conditions of the reservoir can be inferred through detection data, thereby providing a reference for the designated mining plan.

[0022] Furthermore, in the above process, when the liquid is introduced into the reactor, it includes introducing fracturing fluid, acidizing fluid or imbibition fluid at a single time, and calculating the imbibition mass and the amount of discharged gas; or introducing at least two of the fracturing fluid, acidizing fluid and imbibition fluid successively, and calculating the imbibition mass and the amount of discharged gas. Such a scheme can form a variety of experimental methods to simulate the complex situations faced by the actual reservoir, so that a variety of simulation experiments can be carried out, and the detection results are more accurate and reliable.

[0023] Compared with the prior art, some beneficial effects of the technical solution disclosed in the present invention include:

[0024] The present invention can satisfy the gas imbibition simulation, liquid fracturing, acidification, imbibition and other processes in the closed space of the reactor, so that the actual reservoir mineral conditions can be inferred from the performance of shale samples, thereby providing a reliable reference basis for actual exploration and exploitation, and facilitating the specification of subsequent mining plans. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only represent some embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0026] Figure 1 This is a schematic diagram of the components of the integrated device. (The solid line in the figure is the material pipeline, and the dotted line is the signal link)

[0027] The meaning of each mark in the above figure is:

[0028] 1. Liquid source; 2. Injection pump; 3. Storage container; 4. Oven; 5. On-off valve; 6. Drain valve; 7. Container barrel; 8. Suspension frame; 9. Lower pressure cover; 10. Upper pressure cover; 11. Weighing sensor; 12. Heating device; 13. Ultrasonic vibration device; 14. Temperature sensor; 15. First pressure sensor; 16. Exhaust valve; 17. Intake valve; 18. Pressurization device; 19. Back pressure valve; 20. Second pressure sensor; 21. Back pressure pump; 22. Air source; 23. Control component. DETAILED DESCRIPTION

[0029] The present invention will be further explained below in conjunction with the accompanying drawings and specific embodiments.

[0030] In view of the shortcomings of the prior art shale sample detection that relies solely on the mass method and the volume method, namely, large detection errors and complicated and cumbersome operation processes, the following embodiments are optimized to overcome the defects in the prior art.

[0031] Example 1

[0032] This embodiment provides an integrated device for detecting the interaction and compatibility of shale and fluid. Figure 1 As shown, it includes a reactor, in which a suspension frame 8 for fixing shale samples is provided; a closed cavity for containing liquid is formed in the reactor, the closed cavity is connected to the liquid supply component and contains the incoming liquid, and the closed cavity is also connected to the gas supply component and contains the incoming gas; the liquid supply component and the liquid supply component include a plurality of detection sensors and are electrically connected to the control component 23, and the control component 23 is used to control the operation of the liquid supply component and the gas supply component and receive and process the detection signals of the detection sensors.

[0033] The integrated device disclosed in this embodiment can realize multiple continuous reaction processes of shale samples in the reactor, such as fracturing process, acidification process and dialysis process, etc. By completing multiple experimental operations in the reactor, the gas and oil storage conditions of shale in the actual environment can be simulated and tested more realistically, thereby obtaining more accurate calculation results, facilitating the speculation of shale deposits in the actual environment and setting a reasonable mining plan.

[0034] In this embodiment, the structure of the reactor for carrying out various reaction processes can be constructed in various schemes, and this embodiment is optimized and adopts one of the feasible options: the reactor includes a container barrel 7, a detachable gland assembly is provided on the container barrel 7, and the gland assembly cooperates with the liquid supply assembly and the gas supply assembly to realize the delivery of liquid or gas to the container barrel 7. When such a scheme is adopted, the container barrel 7 and the gland assembly cooperate to form a closed space, and the gland assembly can cooperate with the container barrel 7 through a threaded structure, a buckle structure, etc., and a seal is provided at the cooperation to form a sealing structure.

[0035] The structure of the gland assembly can also be optimized. This embodiment adopts one of the feasible options: the gland assembly includes a lower gland 9 connected to the container barrel 7, and also includes an upper gland 10 arranged on the lower gland 9; the liquid supply assembly and the gas supply assembly are both matched to the lower gland 9, and the upper gland 10 is matched with the suspension frame 8 and is provided with a weighing sensor 11. When such a solution is adopted, the upper gland 10 is detachably connected to the lower gland 9, and a sealing structure is formed at the connection. The size of the upper gland 10 is smaller than that of the upper gland 10 and can be removed from the upper gland 10 separately. After the upper gland 10 is removed, it can be used to place shale samples, and it can also be used to observe whether the settings of the weighing sensor 11 and the shale samples are reasonable, so as to facilitate timely adjustment of abnormal conditions.

[0036] Preferably, the upper pressure cover 10 can be arranged at the center of the lower pressure cover 9, and both the upper pressure cover 10 and the lower pressure cover 9 are round covers.

[0037] In this embodiment, the liquid required for the experiment is injected into the reactor through the liquid supply component, and the temperature and other parameters of the liquid itself are adjusted. Its structure is not limited to a single one. This embodiment is optimized and adopts one of the feasible options: the liquid supply component includes an injection pump 2 connected to a liquid source 1, and the injection pump 2 is connected to a plurality of storage containers 3 for storing liquid. The storage container 3 is connected to the reactor and delivers the liquid to the reactor; the storage container 3 also cooperates with the heating component to achieve the heating of the liquid. When such a scheme is adopted, the injection pump 2 obtains the liquid from the liquid source 1 and first sends it to the storage container 3, and then adjusts the temperature to the required value under the action of the heating component and then sends it to the reactor; wherein the required amount of liquid can be accurately obtained through the injection pump 2, or a slightly excessive amount of liquid can be first obtained to the storage container 3, and then the liquid is accurately pumped into the reactor through components such as a metering pump.

[0038] Preferably, in the present embodiment, two storage containers 3 are provided, and an on-off valve 5 is provided between the storage container 3 and the reactor, and the on-off valve 5 is used to control the on-off of the pipeline between the storage container 3 and the reactor.

[0039] In this embodiment, the structure of the heating component is not limited to a single one, and this embodiment is optimized and adopts one of the feasible options: the heating component includes an oven 4, and the storage containers 3 are all arranged in the oven 4 and heated by the oven 4. When such a solution is adopted, the storage container 3 is placed in the oven 4 for baking and heating, and the electric oven 4 can be used for heating, so that the heating temperature can be accurately controlled.

[0040] Preferably, the oven 4 is provided with an observation window and an inspection door.

[0041] The gas supply assembly used in this embodiment introduces the required gas into the reactor and adjusts the temperature parameters of the gas itself. Its structure is not limited to the only one. This embodiment is optimized and adopts one of the feasible options: the gas supply assembly includes a gas source 22, which is connected to the reactor through an intake pipeline and used to introduce gas. A booster device 18 and a first pressure sensor 15 are provided on the intake pipeline. The reactor is also provided with an exhaust pipeline to discharge gas to the outside. The exhaust pipeline is also provided with a second pressure sensor 20, a back pressure pump 21 and a back pressure valve 19. When such a scheme is adopted, gas is introduced into the reactor through the intake pipeline, during which the booster device 18 can control the pressure of the introduced gas, and the first pressure sensor 15 can detect the pressure value of the reactor and the internal space of the intake pipeline. The intake pipeline is provided with an intake valve 17 for controlling the opening and closing of the pipeline. The gas in the reactor is discharged to the outside through the exhaust pipeline, and the air pressure in the reactor can be adjusted. At the same time, the second pressure sensor 20 is used to detect the pressure value in the connecting space between the exhaust pipeline and the reactor, and the back-pressure valve 19 and the back-pressure pump 21 are used to control the exhaust process of the exhaust pipeline and the reactor, which can appropriately block the exhaust and keep the pressure in the reactor stable. An exhaust valve 16 is also provided on the exhaust pipeline to control the on-off of the pipeline.

[0042] When adjusting the temperature of the internal space of the reactor, the temperature adjustment can be achieved through a variety of solutions. Here, an optimization is made and one feasible option is proposed: the reactor is connected to a heating device 12 for heating the inside of the reactor, and the reactor is also connected to a temperature sensor 14 for detecting the temperature inside the reactor. When such a solution is adopted, the heating device 12 can be set at the bottom of the reactor, for example, a heating coil is set; it can also be set on the side wall of the reactor and wound with a heating coil.

[0043] During the reaction process, the shale imbibition process will cause some bubbles to adhere to the surface, affecting the detection results of the load-bearing sensor. Therefore, it is necessary to eliminate the bubbles before measuring. There are many specific solutions, which are not limited to the only ones. This embodiment is optimized and adopts one of the feasible options: the reactor is also connected with an ultrasonic vibration device 13 to send ultrasonic waves to the reactor to form shale sample vibration. When such a solution is adopted, the ultrasonic waves sent by the ultrasonic vibration device 13 can break the attached bubbles, or make the bubbles detach from the shale surface and leave the liquid, thereby improving the accuracy of the measurement results.

[0044] Example 2

[0045] The content of the above-mentioned embodiment 1 explains the integrated device for detection. This embodiment also provides a corresponding detection method, which is explained in the following content.

[0046] A method for detecting the interaction and compatibility between shale and fluid, using the device in Example 1, comprising:

[0047] S1: Check the air tightness of the reactor and perform subsequent operations when the air tightness requirements are met;

[0048] S2: placing the shale sample to be tested inside the reactor, and introducing gas into the reactor so that the gas pressure and temperature inside the reactor reach the set conditions, so that the shale sample absorbs the gas within the set time;

[0049] S3: A set amount of liquid is introduced into the reactor, and the weight change of the shale sample after the liquid is introduced is calculated, and the imbibition mass and the exhaust gas volume of the shale sample are calculated.

[0050] The method disclosed in this embodiment provides corresponding reaction gas and reaction liquid to simulate the situation of shale in the actual reservoir environment by maintaining the airtightness inside the reaction gas, so that the shale geological conditions of the reservoir can be inferred through detection data, thereby providing a reference for the designated mining plan.

[0051] In the above process, when liquid is introduced into the reactor, it includes introducing fracturing fluid, acidizing fluid or imbibition fluid at a time, and calculating the imbibition mass and the amount of discharged gas; or introducing at least two of fracturing fluid, acidizing fluid and imbibition fluid successively, and calculating the imbibition mass and the amount of discharged gas. Such a scheme can form a variety of experimental methods to simulate the complex situations faced by actual reservoirs, so that a variety of simulation experiments can be carried out, and the detection results are more accurate and reliable.

[0052] Follow the above method and here are a few examples to illustrate:

[0053] Case 1

[0054] (1) Connect the pipeline according to the flow chart, check and ensure that all valves are closed, open the air inlet valve 17 under computer control to fill the reactor with 1.0MPa gas, close the air inlet valve 17, and observe the changes in the pressure gauge. If the pressure gauge continues to drop, the air tightness of the device is not good, perform a leak test on the device, and repeat the above operation. If the pressure gauge drops slightly and then stabilizes, the air tightness of the device is good, and the experiment continues.

[0055] (2) Open the upper gland 10, place a pure matrix shale sample with a diameter of 2.5 cm and a length of 5 cm on the rock sample suspension frame 8 connected to the weighing sensor 11, and hang the upper gland 10 on the wall;

[0056] (3) Adjust the temperature of multiple functional reaction systems to the experimental temperature of 140°C, open the air inlet valve 17 under computer control, and open the gas cylinder (methane gas). Pump the experimental gas into the reactor with the help of a gas booster pump. After reaching the experimental pressure (formation pressure), control the closing of the gas cylinder and the air inlet valve 17. Let the device stand for 3-6 hours to allow the gas to be fully saturated and adsorbed in the core.

[0057] (4) The temperature of the oven 4 is set to the experimental temperature. After the experimental liquid is heated to the experimental temperature, the pressure of the back pressure valve 19 is adjusted to the experimental pressure, and the exhaust valve 16 is opened. Then, the on-off valve 5 between the storage container 3 and the reaction gas is opened, and the fracturing fluid is pumped into the container with the help of the injection pump 2. After the fracturing fluid has submerged the core, the injection pump 2 is turned off, and the on-off valve 5 and the exhaust valve 16 are closed;

[0058] (5) Through the control and information acquisition system, the collection interval of the weighing sensor 11 is set to 5 minutes. The ultrasonic vibration device 13 is started 20 seconds before data collection (to eliminate bubbles attached to the surface of the core, so as to accurately collect force changes). The vibration stops after 10 seconds, and the force F is collected after stabilization for 10 seconds.

[0059] (6) The curve of F versus time is monitored in real time by the control and information acquisition system. When the curve is stable, the acquisition is terminated and the heating is stopped. Given the initial mass of the dry rock sample and the density parameters of the liquid and gas, the imbibition mass and the amount of discharged gas can be calculated.

[0060] (7) When the monitoring device senses that the temperature of the reaction system has dropped to room temperature, the computer controls the opening of the drain valve 6 between the storage container 3 and the reactor to drain the liquid. After the liquid is drained, the exhaust valve 16 is opened and the back pressure is set to 0 to drain the gas. Finally, the upper pressure cover 10 is opened to take out the rock sample, and the reactor is cleaned and returned to its original position. The experiment ends here.

[0061] Case 2

[0062] (1) Connect the pipeline according to the flow chart, check and ensure that all valves are closed, open the air inlet valve 17 under computer control to fill the reactor with 1.0MPa of gas, close the air inlet valve 17, and observe the changes in the pressure gauge. If the pressure gauge value continues to drop, the air tightness of the device is not good, perform a leak test on the device, and repeat the above operation. If the pressure gauge value drops slightly and then stabilizes, the air tightness of the device is good, and the experiment continues.

[0063] (2) Open the upper pressure cover 10, place a matrix-fracture shale sample with a diameter of 2.5 cm and a length of 10 cm containing a single fracture on a rock sample hanger connected to a weighing sensor 11, and hang the pressure cover on the wall;

[0064] (3) Adjust the temperature of multiple functional reaction systems to the experimental temperature, open the air inlet valve 17 under computer control, and open the gas cylinder (methane gas). Use the gas booster pump to pump the experimental gas into the imbibition container. After reaching the experimental pressure (formation pressure), close the gas cylinder and the air inlet valve 17, and let the device stand for 3-6 hours to allow the gas to be fully saturated and adsorbed in the core.

[0065] (4) The temperature of the oven 4 is set to the experimental temperature of 110°C. After the experimental liquid is heated to the experimental temperature, the pressure of the back pressure valve 19 is adjusted to the experimental pressure, and the exhaust valve 16 is opened. Then, the valve between the storage container 3 and the reactor is opened, and the acidizing liquid is pumped into the container with the help of the injection pump 2. The amount of acidizing liquid entering and the change in the core quality are recorded in real time through the control and information acquisition system. The on-off valve 5 between the storage container 3 and the reactor is closed, and the drain valve 6 is opened to discharge the acidizing liquid. After the fracturing fluid is pumped in and submerged in the core, the injection pump 2 is closed, and the on-off valve 5 between the storage container 3 and the reactor and the exhaust valve 16 of the exhaust pipeline are closed. The amount of fracturing fluid entering and the change in the core quality are recorded in real time through the control and information acquisition system.

[0066] (5) When the curve is stable, the acquisition is terminated, heating is stopped, and the pressure is released. The F-time curves of the two reaction processes of shale acidification and shale imbibition are plotted through the control and information acquisition system, and the mass loss after shale acidification, the mass of liquid imbibed, and the volume of discharged gas are calculated.

[0067] (6) When the monitoring device senses that the temperature of the reaction system has dropped to room temperature, the computer controls the opening of the drain valve 6 to drain the liquid. After the liquid is drained, the back pressure valve 19 is opened and the back pressure is set to 0 to drain the gas. Finally, the upper pressure cover 10 is opened, the rock sample is taken out, and the multifunctional container is cleaned and put back in place. The experiment ends here.

[0068] Case 3

[0069] (1) Connect the pipeline according to the flow chart, check and ensure that all valves are closed, open the air inlet valve 17 through computer operation to fill the reactor with 1.0MPa of gas, close the air inlet valve 17, and observe the changes in the pressure gauge. If the pressure gauge continues to drop, the air tightness of the device is not good, perform a leak test on the device, and repeat the above operation. If the pressure gauge drops slightly and then stabilizes, the air tightness of the device is good, and the experiment continues.

[0070] (2) Open the upper pressure cover 10, place the core model containing cracks, a square rock sample with a length of 5 cm and a width of 10 cm and an outer contact surface sealed with resin, into the rock sample hanger connected to the weighing sensor 117, and close the pressure cover.

[0071] (3) The temperature of the multiple functional reaction systems is adjusted to the experimental temperature of 120°C, and the on-off valve 5 is opened by computer operation. The crude oil is pumped into the multiple functional reaction systems with the help of the gas injection system. After reaching the experimental pressure (formation pressure), the on-off valve 5 is controlled to be closed, and the device is left to stand for 12 hours to allow the crude oil to be fully saturated and adsorbed in the shale.

[0072] (4) Computer control is used to open the drain valve 6 to discharge excess crude oil, and the temperature of the oven 421 is set to the experimental temperature. After the experimental liquid is heated to the experimental temperature, the pressure of the back pressure valve 19 is adjusted to the experimental pressure, the drain valve 6 is closed, the back pressure valve 19 is opened to adjust the back pressure, and then the on-off valve 5 is opened. With the help of the injection pump 2 and the intermediate container group, the fracturing fluid is first pumped into the reaction container to simulate the process of the shale fracture surface and the fracturing fluid first contacting, and then the imbibition fluid is replaced by the imbibition fluid to simulate the imbibition oil production process. The imbibition process of shale and fracturing fluid, and shale and imbibition fluid is recorded in real time through the control and information acquisition system.

[0073] (5) When the curve is stable, the acquisition is terminated, heating is stopped, and the pressure is released. The F-time curves of the two reaction processes of shale fracturing fluid and imbibition fluid are plotted through the control and information acquisition system, and the imbibition quality and discharged crude oil quality of the two processes are calculated.

[0074] (6) The monitoring device senses that the temperature of the reaction system has dropped to room temperature, and the computer controls the opening of the drain valve 6 to drain the liquid. After the liquid is drained, the back pressure valve 19 is opened and the back pressure is set to 0 to drain the gas. Finally, the upper pressure cover 10 is opened, the rock sample is taken out, and the multifunctional container is cleaned and returned to its original position. The experiment ends here.

[0075] The above are the implementation methods listed in this embodiment, but this embodiment is not limited to the above optional implementation methods. Those skilled in the art can arbitrarily combine the above methods to obtain other various implementation methods. Anyone can derive other various implementation methods under the inspiration of this embodiment. The above specific implementation methods should not be understood as limiting the protection scope of this embodiment. The protection scope of this embodiment should be based on the definition in the claims.

Claims

1. An integrated device for detecting the interaction and compatibility of shale and fluid, characterized by: The invention comprises a reactor, wherein a suspension frame (8) for fixing a shale sample is arranged in the reactor; a closed cavity for containing liquid is formed in the reactor, the closed cavity is connected to a liquid supply component and contains the liquid entering, and the closed cavity is also connected to a gas supply component and contains the gas entering; the liquid supply component and the liquid supply component include a plurality of detection sensors and are electrically connected to a control component (23), and the control component (23) is used to control the operation of the liquid supply component and the gas supply component and receive and process detection signals of the detection sensors.

2. The integrated device for detecting the interaction and compatibility of shale and fluid according to claim 1 is characterized in that: The reactor comprises a container barrel (7), on which a detachable gland assembly is arranged, and the gland assembly cooperates with a liquid supply assembly and a gas supply assembly to realize the delivery of liquid or gas to the container barrel (7).

3. The integrated device for detecting the interaction and compatibility of shale and fluid according to claim 2 is characterized in that: The gland assembly comprises a lower gland (9) connected to the container body (7), and an upper gland (10) arranged on the lower gland (9); the liquid supply assembly and the gas supply assembly are both matched to the lower gland (9), and the upper gland (10) is matched with the suspension frame (8) and is provided with a weighing sensor (11).

4. The integrated device for detecting the interaction and compatibility of shale and fluid according to any one of claims 1 to 3, characterized in that: The liquid supply component comprises an injection pump (2) connected to a liquid source (1), the injection pump (2) being connected to a plurality of storage containers (3) for storing liquid, the storage containers (3) being connected to a reactor and conveying the liquid into the reactor; the storage containers (3) also cooperate with a heating component to achieve heating of the liquid.

5. The integrated device for detecting the interaction and compatibility of shale and fluid according to claim 4 is characterized in that: The heating component comprises an oven (4), and the storage containers (3) are all arranged in the oven (4) and are heated by the heat provided by the oven (4).

6. The integrated device for detecting the interaction and compatibility of shale and fluid according to any one of claims 1 to 3, characterized in that: The gas supply assembly comprises a gas source (22), which is connected to the reactor through an air intake pipeline and is used to introduce gas, and a pressurizing device (18) and a first pressure sensor (15) are arranged on the air intake pipeline; the reactor is also provided with an exhaust pipeline to discharge gas to the outside, and a second pressure sensor (20), a back pressure pump (21) and a back pressure valve (19) are also arranged on the exhaust pipeline.

7. The integrated device for detecting the interaction and compatibility of shale and fluid according to claim 1 is characterized in that: The reactor is connected to a heating device (12) for heating the inside of the reactor, and the reactor is also connected to a temperature sensor (14) for detecting the temperature inside the reactor.

8. The integrated device for detecting the interaction and compatibility of shale and fluid according to claim 1 is characterized in that: The reactor is also connected to an ultrasonic vibration device (13) for sending ultrasonic waves to the reactor to cause the shale sample to vibrate.

9. A method for detecting the interaction and compatibility between shale and fluid, using the device described in any one of claims 1 to 8, characterized in that: include: Check the air tightness of the reactor and perform subsequent operations when the air tightness requirements are met; The shale sample to be tested is placed inside the reactor, and gas is introduced into the reactor to make the gas pressure and temperature inside the reactor reach the set conditions, so that the shale sample absorbs the gas within the set time; A set amount of liquid is introduced into the reactor, and the weight change of the shale sample after the liquid is introduced is calculated, and the imbibition mass and exhaust gas volume of the shale sample are calculated.

10. The method for detecting the interaction and compatibility of shale and fluid according to claim 9, characterized in that: When liquid is introduced into the reactor, it includes introducing fracturing fluid, acidizing fluid or imbibition fluid once, and calculating the imbibition mass and the amount of discharged gas; or introducing at least two of fracturing fluid, acidizing fluid and imbibition fluid successively, and calculating the imbibition mass and the amount of discharged gas.

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