CN115508496A - A water-rock reaction device and method for simulating atmospheric precipitation fluid and surrounding rock - Google Patents

Abstract

The invention discloses a water-rock reaction device and a water-rock reaction method for simulating atmospheric precipitation fluid and surrounding rock, which relate to the technical field of water-rock reaction and comprise the following steps: the reaction kettle is provided with a temperature control structure; the fluid injection structure comprises a fluid configuration component and an injection driving component, wherein the fluid configuration component is connected with the reaction kettle; the chemical signal acquisition structure is connected with the reaction kettle; the backflow structure has one end connected with the chemical signal acquisition structure and the other end connected with the fluid injection structure, and can backflow the fluid detected by the chemical signal acquisition structure into the fluid injection structure; the device can be through fluid injection structure configuration and to injecting the simulation atmosphere precipitation fluid of the temperature and the pressure of simulation certain degree of depth into reation kettle, utilize simulation atmosphere precipitation fluid to react with the rock specimen in the reation kettle to reaction solution after the monitoring reaction of chemical signal acquisition structure.

Description

A water-rock reaction device and method for simulating atmospheric precipitation fluid and surrounding rock

technical field

The invention belongs to the technical field of water-rock reaction, and more particularly relates to a water-rock reaction device and method for simulating atmospheric precipitation fluid and surrounding rock.

Background technique

The main oil and gas basins in China have experienced or are undergoing the transformation process of atmospheric precipitation fluids. Atmospheric precipitation fluids can cause dissolution and transformation of reservoirs. Today's oil and gas exploration practice has revealed the important oil and gas value of reservoirs transformed by atmospheric precipitation. Atmospheric precipitation fluid migrates along the fracture system and continuously reforms the surrounding rock, and the storage performance of the reformed surrounding rock is improved. The source of the fluid is mainly atmospheric precipitation, which may dissolve carbon dioxide and may Dissolve mineral components, etc. Reservoirs reformed by atmospheric precipitation fluids are widely distributed, especially in the Tarim Basin and Sichuan Basin. The mechanism of material and energy changes and surrounding rock dissolution and precipitation during the transformation process of fluid-rock interaction is still unclear, so it needs to be clarified by carrying out experiments that simulate the transformation of surrounding rocks by atmospheric precipitation fluids from the surface to deep formations.

In the actual geological environment, as the formation depth increases, the corresponding temperature and pressure also increase synchronously. In the atmospheric precipitation fluid surrounding rock experiment simulating the formation environment, the biggest difficulty is that as the atmospheric precipitation enters the deep formation from the shallow formation, the composition of the atmospheric precipitation is a dynamic process. The atmospheric precipitation fluid continuously dissolves carbon dioxide and dissolves the surrounding rock. Mineral components such as salts, gypsum minerals, carbonate rock minerals, etc., when the carbonate rock minerals in the fluid are supersaturated, the corresponding minerals will be precipitated under suitable conditions. The atmospheric precipitation fluid surrounding rock experiment that simulates the formation environment is generally a dynamic dissolution and precipitation process of a fluid-rock system with three variables (temperature, pressure, minerals), and there is still a lack of corresponding devices and methods to simulate and quantitatively characterize this. a process.

The existing water-rock chemical reaction devices mostly adopt the continuous flow method. The reactor is equipped with granular rock samples or core samples. The fluid enters the reactor through the pipeline to react with the samples for a period of time. After the reaction is completed, the microscopic morphology of the rock samples changes. , Changes in structural composition, changes in the concentration of ionic components in the fluid after the reaction, calculation and speculation of the reaction process. Since this type of device is only designed with one reactor and one fluid booster pump, it can only simulate the water-rock reaction at a certain depth of temperature and pressure, and the reaction pressure condition is relatively simple. At the same time, due to the lack of a corresponding fluid pressurization system, it is impossible to prepare atmospheric precipitation fluid corresponding to formation pressure conditions, and it is impossible to truly reproduce the reaction environment. However, only imitating the reaction between atmospheric precipitation fluid and rock under normal temperature and pressure on the surface is obviously unable to meet the current needs of deep exploration and exploration of the reaction process and mechanism of deep fluid and rock.

Contents of the invention

The purpose of the present invention is to address the deficiencies in the prior art, to provide a water-rock reaction device and method for simulating atmospheric precipitation fluid and surrounding rock, which can simulate a certain depth through fluid injection structure configuration and injection into the reactor The temperature and pressure of the simulated atmospheric precipitation fluid, the simulated atmospheric precipitation fluid is used to react with the rock sample in the reactor, and the reaction solution after the reaction is monitored through the chemical signal acquisition structure; the temperature and pressure at different depths can be simulated through multiple experiments The simulated atmospheric precipitation fluid reacts with rock samples at different depths, providing an experimental basis for reservoir reconstruction and prediction.

In order to achieve the above object, the present invention provides a water-rock reaction device for simulating atmospheric precipitation fluid and surrounding rock, the device comprising:

A reaction kettle, the reaction kettle is provided with a temperature control structure;

A fluid injection structure, including a fluid configuration component and an injection drive component, the fluid configuration component is connected to the reactor;

A chemical signal collection structure connected to the reactor;

The backflow structure is connected to the chemical signal collection structure at one end and connected to the fluid injection structure at the other end, and the backflow structure can return the fluid detected by the chemical signal collection structure back into the fluid injection structure.

Optionally, the temperature control structure includes a heating jacket, and the heating jacket is arranged on the outside of the reaction kettle.

Optionally, the fluid configuration assembly includes:

The intermediate container is connected to the reaction kettle through a first pipeline, and the first pipeline is sequentially provided with a first valve, a preheater and a second valve from one end close to the intermediate container to an end close to the reaction kettle ;

A gas cylinder is connected to the intermediate container through a second pipeline, and a third valve and a gas booster pump are arranged on the second pipeline;

The pressure vessel is connected to the intermediate vessel through a third pipeline, and a fourth valve and a first constant pressure and constant flow pump are arranged on the third pipeline.

Optionally, carbon dioxide gas is stored in the gas cylinder, and water is stored in the pressure vessel.

Optionally, the reflux structure includes:

A separator, the input end of the separator is connected to the chemical signal acquisition structure through a fourth pipeline, and a back pressure valve is arranged on the fourth pipeline;

The second constant pressure and constant flow pump is connected at one end to the first outlet of the separator, and at the other end to the fluid configuration component through a fifth pipeline, and a fifth valve is arranged on the fifth pipeline.

Optionally, a sixth valve is provided on the second outlet of the separator.

Optionally, the injection driving component is the first constant pressure and constant flow pump.

The present invention also provides a water-rock reaction method for simulating atmospheric precipitation fluid and surrounding rock, utilizing the above-mentioned water-rock reaction device for simulating atmospheric precipitation fluid and surrounding rock, the method comprising:

configuring a first simulated atmospheric precipitation fluid in the fluid configuration component;

Injecting the first simulated atmospheric precipitation fluid into a reactor filled with rock samples;

reacting the first simulated atmospheric precipitation fluid with the rock sample at a first set temperature and a first set pressure;

Monitoring the first chemical parameters in the first reaction fluid discharged from the reactor after the first simulated atmospheric precipitation fluid reacts with the rock sample.

Optionally, configuring the first simulated atmospheric precipitation fluid in the fluid configuration component includes:

injecting water into the fluid configuration assembly;

Injecting carbon dioxide gas into the fluid configuration assembly containing water to form a carbon dioxide solution in the fluid configuration assembly;

controlling the pressure of the carbon dioxide solution by controlling the injection amount of the carbon dioxide gas;

The carbon dioxide solution is preheated to form the first simulated atmospheric precipitation fluid.

Optionally, after the monitoring of the chemical parameters in the reaction fluid discharged from the reactor after the first simulated atmospheric precipitation fluid reacts with the rock sample, it also includes:

configuring a second simulated atmospheric precipitation fluid in the fluid configuration component;

Injecting the second simulated atmospheric precipitation fluid into the reactor;

reacting the second simulated atmospheric precipitation fluid with the rock sample at a second set temperature and a second set pressure;

Monitoring the second chemical parameter in the second reaction fluid discharged from the reactor after the second simulated atmospheric precipitation fluid reacts with the rock sample.

The invention provides a water-rock reaction device and method for simulating atmospheric precipitation fluid and surrounding rock, the beneficial effect of which is that the device can configure and inject a simulated atmospheric temperature and pressure into the reactor through the configuration of the fluid injection structure Precipitation fluid, using the simulated atmospheric precipitation fluid to react with the rock sample in the reactor, and monitor the reaction solution after the reaction through the chemical signal acquisition structure; through multiple experiments, the simulated atmospheric precipitation fluid with different depths of temperature and pressure can be simulated and different The response of rock samples at depth provides an experimental basis for reservoir reformation and prediction; this method uses this device to simulate atmospheric precipitation fluids at different depths of temperature and pressure, and use it to interact with rocks at different temperatures and pressures Several water-rock reaction experiments were carried out to simulate the transformation process of atmospheric precipitation fluid on the surrounding rock of different depths and layers, and provide a theoretical basis for the study of atmospheric precipitation fluid on the transformation of surrounding rock.

Other features and advantages of the present invention will be described in detail in the detailed description that follows.

Description of drawings

The above and other objects, features and advantages of the present invention will become more apparent by describing the exemplary embodiments of the present invention in more detail with reference to the accompanying drawings, wherein, in the exemplary embodiments of the present invention, the same reference numerals generally represent same parts.

Fig. 1 shows a schematic structural diagram of a water-rock reaction device for simulating atmospheric precipitation fluid and surrounding rock according to Embodiment 1 of the present invention.

Fig. 2 shows a flow chart of a method for simulating the water-rock reaction between atmospheric precipitation fluid and surrounding rock according to Embodiment 2 of the present invention.

Explanation of reference signs:

1. Reactor; 2. Fluid injection structure; 3. Chemical signal acquisition structure; 4. Return structure; 5. Intermediate container; 6. First valve; 7. Preheater; 8. Second valve; 9. Gas cylinder 10, the third valve; 11, gas booster pump; 12, pressure vessel; 13, the fourth valve; 14, the first constant pressure constant flow pump; 15, separator; 16, back pressure valve; 17, the second Constant pressure and constant flow pump; 18, the fifth valve; 19, the sixth valve.

detailed description

Preferred embodiments of the present invention will be described in more detail below. Although preferred embodiments of the present invention are described below, it should be understood that the present invention can be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.

The invention provides a water-rock reaction device for simulating atmospheric precipitation fluid and surrounding rock, the device comprising:

Reactor, the reactor is provided with a temperature control structure;

The fluid injection structure includes a fluid configuration component and an injection drive component, and the fluid configuration component is connected to the reactor;

The chemical signal acquisition structure is connected with the reactor;

The backflow structure is connected to the chemical signal collection structure at one end and the fluid injection structure at the other end. The backflow structure can return the fluid detected by the chemical signal collection structure into the fluid injection structure.

Specifically, the fluid injection structure can configure the simulated atmospheric precipitation fluid under the conditions of normal temperature and pressure on the surface and the high temperature and high pressure of the deep formation through the fluid configuration component, and inject the simulated atmospheric precipitation fluid into the reactor through the injection drive component, and react with the The rock samples in the kettle undergo water-rock reaction. At the same time, the pressure of the reactor and the pressure of the reactor are controlled by injecting the drive components, and the temperature in the reactor is controlled by the temperature control structure. The rock samples on the surface and in the deep formation are simulated in the reactor. Environment, cooperate with the simulated atmospheric precipitation fluid to realize the process of transforming the simulated atmospheric precipitation fluid at different depths of the surrounding rock at the depth, and use the chemical signal acquisition structure to monitor the chemical signal in the reacted liquid in real time; the setting of the backflow structure The reaction solution produced after the previous water-rock reaction can flow back to the fluid injection structure, and the next water-rock reaction uses the reaction solution returned from the previous time to more accurately simulate the flow of atmospheric precipitation fluid from the shallow layer to the deep layer , the process of reacting and reforming the surrounding rocks at different depths makes the experimental results closer to the real situation; this device can study the process of continuous reforming of carbonate reservoirs by atmospheric precipitation fluid along the fault, and explore the water-rock reaction process The regularity of mineral dissolution and pore filling in the reservoir, monitoring the trend of expansion or shrinkage of the reservoir space under different temperature and pressure conditions, and judging the critical point of mineral dissolution and precipitation are useful for monitoring the degree of transformation of the reservoir by atmospheric precipitation fluid at different depths. It is of great scientific significance to find out the interaction law of atmospheric precipitation fluid and surrounding rock; the device has strong practical application significance, and can be used in research fields such as reservoir genesis, reservoir transformation, reservoir prediction, carbon capture and carbon sequestration, and is easy to apply promote.

Optionally, the temperature control structure includes a heating jacket, and the heating jacket is arranged on the outside of the reaction kettle.

Specifically, the reactor can be heated through the heating jacket, and the high-temperature environment in the deep formation can be simulated in the reactor, and the surrounding rock in the deep formation can be simulated in one pass to simulate the water-rock reaction of the atmospheric precipitation fluid.

In one example, the reactor is made of Hastelloy material, which has high strength, acid and alkali corrosion resistance, high temperature resistance, and high pressure resistance; as the reactor itself, it can meet the experimental needs of high temperature and high pressure conditions and different types of fluids.

Optionally, the fluid configuration components include:

The intermediate container is connected to the reactor through the first pipeline, and the first pipeline is provided with a first valve, a preheater and a second valve in sequence from one end close to the intermediate container to one end close to the reactor;

The gas cylinder is connected to the intermediate container through the second pipeline, and the second pipeline is provided with a third valve and a gas booster pump;

The pressure vessel is connected to the intermediate vessel through a third pipeline, and a fourth valve and a first constant pressure and constant flow pump are arranged on the third pipeline.

Specifically, the intermediate container is used as a mixing container for the gas in the cylinder and the liquid in the pressure vessel, the pressure in the intermediate container can be controlled by the gas booster pump, and the solution in the intermediate container can be preheated by the preheater.

Optionally, carbon dioxide gas is stored in the cylinder, and water is stored in the pressure vessel.

Specifically, carbon dioxide gas is stored in the gas cylinder, water is stored in the pressure vessel, the first constant pressure constant flow pump can pump the water into the intermediate container, and the gas booster pump can pump the carbon dioxide gas into the intermediate container, and the intermediate container The carbon dioxide solution is formed inside; the pressure in the intermediate container is controlled by the gas booster pump, and the carbon dioxide solution can be preheated by the preheater to form a simulated atmospheric precipitation fluid at a certain temperature and pressure, which can simulate the atmosphere in a certain depth of formation precipitation fluid.

Optionally, the reflow structure includes:

a separator, the input end of the separator is connected to the chemical signal acquisition structure through a fourth pipeline, and a back pressure valve is arranged on the fourth pipeline;

The second constant pressure and constant flow pump has one end connected to the first outlet of the separator, and the other end connected to the fluid configuration component through a fifth pipeline, and a fifth valve is arranged on the fifth pipeline.

Specifically, the separator is a solid-liquid separator capable of separating solids, and the second constant-pressure and constant-flow pump can pump the liquid back into the intermediate container through the fifth pipeline to achieve reflux.

Optionally, a sixth valve is provided on the second outlet of the separator.

Specifically, the sixth valve can control the discharge of the solids separated by the separator.

Optionally, the injection driving component is a first constant pressure and constant flow pump.

Specifically, using the first constant pressure and constant flow pump as the injection drive component, the first constant pressure and constant flow pump can not only pump the water in the pressure vessel into the intermediate vessel, but also pump the carbon dioxide solution in the intermediate vessel into the reaction kettle, and Control the pressure in the reactor.

The present invention also provides a water-rock reaction method for simulating atmospheric precipitation fluid and surrounding rock, utilizing the above-mentioned water-rock reaction device for simulating atmospheric precipitation fluid and surrounding rock, the method comprising:

configuring a first simulated atmospheric precipitation fluid in the fluid configuration component;

injecting the first simulated atmospheric precipitation fluid into the reactor filled with rock samples;

reacting the first simulated atmospheric precipitation fluid with the rock sample at a first set temperature and a first set pressure;

The first chemical parameter in the first reaction fluid discharged from the reactor after the first simulated atmospheric precipitation fluid reacts with the rock sample is monitored.

Specifically, the first simulated atmospheric precipitation fluid can be configured in the fluid configuration component, and the fluid can simulate the atmospheric precipitation fluid in a deep formation, and the first simulated atmospheric precipitation fluid is injected into the reaction tank and the reaction tank through the injection drive component. The rock sample contact controls the pressure in the reactor at the same time, and the temperature in the reactor is controlled by the temperature control structure, so that the temperature and pressure in the reactor are respectively the first set temperature and the first set pressure. After the temperature and pressure are stabilized, the For the water-rock reaction of the first set duration, the chemical signal acquisition structure is used to collect the Ca ²⁺ concentration, Mg ²⁺ concentration, pH value, etc. in the reaction solution flowing out of the reactor after the reaction.

Optionally, configuring the first simulated atmospheric precipitation fluid in the fluid configuration component includes:

Injecting water into the fluid configuration assembly;

Inject carbon dioxide gas into the fluid configuration component filled with water to form a carbon dioxide solution in the fluid configuration component;

Control the pressure of the carbon dioxide solution by controlling the injection amount of carbon dioxide gas;

The carbon dioxide solution is preheated to form the first simulated atmospheric precipitation fluid.

Specifically, the first simulated atmospheric precipitation fluid is a carbon dioxide solution at a certain temperature and a certain pressure. The water in the pressure vessel can be injected into the intermediate vessel through the first constant pressure and constant flow pump, and the water in the gas cylinder can be injected into the intermediate vessel through the gas booster pump. Carbon dioxide gas is injected into the intermediate container to form a carbon dioxide solution in the intermediate container. The pressure of the carbon dioxide solution can be controlled by the gas booster pump, and the temperature of the carbon dioxide solution can be controlled by the preheater.

Optionally, after monitoring the chemical parameters in the reaction fluid discharged from the reactor after the first simulated atmospheric precipitation fluid reacts with the rock sample, it also includes:

configuring a second simulated atmospheric precipitation fluid in the fluid configuration component;

Injecting the second simulated atmospheric precipitation fluid into the reactor;

reacting the second simulated atmospheric precipitation fluid with the rock sample at a second set temperature and a second set pressure;

A second chemical parameter in the second reaction fluid discharged from the reactor after the second simulated atmospheric precipitation fluid reacts with the rock sample is monitored.

Specifically, after using the first simulated atmospheric precipitation fluid to react with the water rock of the rock sample at the first set temperature and the first set pressure, the temperature and pressure of the simulated atmospheric precipitation fluid are changed to form the second simulated atmospheric precipitation fluid, Capable of simulating the atmospheric precipitation fluid in the stratum at another depth, the fluid reacts with the rock sample under the second set temperature and the second set pressure, simulating the second simulated atmospheric precipitation fluid and the stratum at another depth The water-rock reaction of the surrounding rock in the middle, using the chemical signal acquisition structure to collect the Ca2+ concentration, Mg2+ concentration, pH value, etc. in the reaction solution flowing out of the reactor after the second reaction; the test results of the second reaction can be compared with the first The comparison of the results of each reaction is convenient for analysis and research.

In one example, it is also possible to carry out experiments in which the simulated atmospheric precipitation fluid reacts with rock samples at different set temperatures and pressures under different pressure and temperature conditions, and the atmosphere can be simulated through such experiments. The process of precipitation fluid transforming the surrounding rocks of different depths from shallow to deep, and a series of analysis and research are carried out through the results of many experiments.

Embodiment one

As shown in Figure 1, the present invention provides a kind of water-rock reaction device that simulates atmospheric precipitation fluid and surrounding rock, and this device comprises:

Reactor 1, a temperature control structure is arranged on the reactor 1;

The fluid injection structure 2 includes a fluid configuration component and an injection drive component, and the fluid configuration component 2 is connected to the reactor 1;

The chemical signal acquisition structure 3 is connected to the reactor 1;

The backflow structure 4 is connected to the chemical signal collection structure 3 at one end and the fluid injection structure 2 at the other end. The backflow structure 4 can return the fluid detected by the chemical signal collection structure 3 back into the fluid injection structure 2 .

In this embodiment, the temperature control structure includes a heating jacket, and the heating jacket is set on the outside of the reaction kettle 1 .

In this embodiment, the fluid configuration assembly includes:

The intermediate container 5 is connected to the reactor 1 through the first pipeline, and the first pipeline is provided with a first valve 6, a preheater 7 and a second valve 8 successively from one end near the intermediate container 5 to the end near the reactor 1;

The gas cylinder 9 is connected to the intermediate container 5 through the second pipeline, and the second pipeline is provided with a third valve 10 and a gas booster pump 11;

The pressure vessel 12 is connected to the intermediate vessel 5 through a third pipeline, and a fourth valve 13 and a first constant pressure and constant flow pump 14 are arranged on the third pipeline.

In this embodiment, carbon dioxide gas is stored in the gas cylinder 9 , and water is stored in the pressure vessel 12 .

In this embodiment, the reflow structure 4 includes:

A separator 15, the input end of the separator 15 is connected to the chemical signal acquisition structure 3 through a fourth pipeline, and a back pressure valve 16 is arranged on the fourth pipeline;

One end of the second constant pressure and constant flow pump 17 is connected to the first outlet of the separator 15 , and the other end is connected to the fluid configuration assembly through a fifth pipeline, and a fifth valve 18 is arranged on the fifth pipeline.

In this embodiment, the second outlet of the separator is provided with a sixth valve 19 .

In this embodiment, the injection driving component is the first constant pressure and constant flow pump 14 .

Embodiment two

As shown in Figure 2, the present invention also provides a kind of water-rock reaction method of simulating atmospheric precipitation fluid and surrounding rock, utilizes the water-rock reaction device of simulating atmospheric precipitation fluid and surrounding rock in embodiment one, and this method comprises:

configuring a first simulated atmospheric precipitation fluid in the fluid configuration component;

injecting the first simulated atmospheric precipitation fluid into the reactor filled with rock samples;

reacting the first simulated atmospheric precipitation fluid with the rock sample at a first set temperature and a first set pressure;

The first chemical parameter in the first reaction fluid discharged from the reactor after the first simulated atmospheric precipitation fluid reacts with the rock sample is monitored.

In this embodiment, configuring the first simulated atmospheric precipitation fluid in the fluid configuration component includes:

Injecting water into the fluid configuration assembly;

Inject carbon dioxide gas into the fluid configuration component filled with water to form a carbon dioxide solution in the fluid configuration component;

Control the pressure of the carbon dioxide solution by controlling the injection amount of carbon dioxide gas;

The carbon dioxide solution is preheated to form the first simulated atmospheric precipitation fluid.

In this embodiment, after monitoring the chemical parameters in the reaction fluid discharged from the reactor after the first simulated atmospheric precipitation fluid reacts with the rock sample, it also includes:

configuring a second simulated atmospheric precipitation fluid in the fluid configuration component;

Injecting the second simulated atmospheric precipitation fluid into the reactor;

reacting the second simulated atmospheric precipitation fluid with the rock sample at a second set temperature and a second set pressure;

A second chemical parameter in the second reaction fluid discharged from the reactor after the second simulated atmospheric precipitation fluid reacts with the rock sample is monitored.

To sum up, when this method uses the water-rock reaction device that simulates atmospheric precipitation fluid and surrounding rock to perform water-rock reaction, taking the water-rock reaction in rock formations at two depths as an example, the experimental process is as follows:

(1) Debugging before the experiment: open the first valve 6, the second valve 8, the third valve 10, the fourth valve 13 and the fifth valve 18, inject water into the whole device, test the sealing performance, control the first constant pressure constant The flow pump 14 pushes the water in the pressure vessel 12 into the intermediate container 5, and then pushes it to the reactor 1 after being heated by the preheater 7, and tests the concentration of background ions in the water in real time through the chemical signal acquisition structure 3;

(2) Experimental fluid system preparation: control the gas booster pump 11 to push the carbon dioxide gas in the gas cylinder 9 into the intermediate container 5, and the pressure of the gas booster pump 11 is set to 0.1Mpa to obtain the carbon dioxide solution under the surface pressure condition. Simulated atmospheric precipitation fluid as the surface;

(3) The first water-rock reaction: put the rock sample into the reactor 1, adjust the temperature of the preheater 7 to 20°C, the simulated atmospheric precipitation fluid on the surface is preheated by the preheater 7, and start after the temperature and pressure are stable. Pump the solution in the intermediate container 5 into the reaction kettle 11 at a speed of 1ml/min through the first constant pressure and constant flow pump 14, adjust the heating jacket of the reaction kettle 1 to 20°C, and adjust it through the first constant pressure and constant flow pump 14 When the system pressure reaches 0.1Mpa, after the system temperature and pressure are stabilized, close the third valve 10, the fourth valve 13, the fifth valve 18 and the sixth valve 19, and start timing the reaction. After 24 hours of reaction, open the fifth valve 18, The reacted fluid passes through the chemical signal acquisition structure 3 to monitor the Ca ²⁺ concentration, Mg ²⁺ concentration, and pH value in the fluid, and the reacted fluid after the fluid is separated in the separator 15 passes through the second constant current constant pressure pump 17 and the fifth constant pressure pump 17. The valve 18 backflows into the intermediate container 5 for preservation, and at this time, the first valve 6, the second valve 8 and the fifth valve 18 are closed;

(4) The second water-rock reaction: adjust the temperature of the preheater 7 to 50°C, adjust the heating jacket of the reactor 1 to 50°C, adjust the system pressure to 1.1Mpa through the first constant pressure and constant flow pump 14, and wait until the temperature and pressure After stabilization, open the first valve 6 and the second valve 8, pump the solution in the intermediate container 5 into the reactor 1 at a speed of 1ml/min, and the reaction starts timing. After 24 hours of reaction, open the fifth valve 18, after the reaction The fluid passes through the chemical signal acquisition structure 3 to monitor the Ca2 ⁺ concentration, ^Mg2+ concentration, and pH value in the fluid. After the fluid is separated in the separator 15, the reaction fluid enters through the second constant current and constant pressure pump 17 and the fifth valve 18. The intermediate container 5 is stored, and the first valve 6, the second valve 8 and the fifth valve 18 are closed to complete the simulation of the water-rock reaction in the bottom layer deeper than the first water-rock reaction, and after the reaction is completed, the sample is subsequently detected, such as Specific surface area, microscopic morphology, mineral composition, etc.;

(5) Data post-processing: Based on the obtained concentration of Ca ²⁺ , Mg ²⁺ ions and pH value of the solution after the reaction, the change trend of the calcium carbonate ion product of the reaction fluid can be calculated, the composition change of the fluid migrating along the fracture can be estimated, and the reaction can be evaluated. The degree of interaction between fluid and carbonate rock in the system, exploring the relationship between temperature, pressure, fluid, lithology and surrounding rock dissolution and precipitation trend, according to the subsequent microscopic morphology analysis of samples, mineral composition analysis and CT scanning, can Analyze the evolution process of pores, caves, and fractures in the reservoir space in the open environment, and analyze the transformation process of different lithologic formations by atmospheric precipitation fluids.

Having described various embodiments of the present invention, the foregoing description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and alterations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments.

Claims (10)

1. A water-rock reaction device for simulating atmospheric precipitation fluid and surrounding rock, characterized in that the device comprises: A reaction kettle, the reaction kettle is provided with a temperature control structure; A fluid injection structure, including a fluid configuration component and an injection drive component, the fluid configuration component is connected to the reactor; A chemical signal collection structure connected to the reactor; The backflow structure is connected to the chemical signal collection structure at one end and connected to the fluid injection structure at the other end, and the backflow structure can return the fluid detected by the chemical signal collection structure back into the fluid injection structure. 2. The water-rock reaction device for simulating atmospheric precipitation fluid and surrounding rock according to claim 1, wherein the temperature control structure includes a heating jacket, and the heating jacket is set on the outside of the reaction kettle. 3. the water-rock reaction device of simulated atmospheric precipitation fluid and surrounding rock according to claim 1, is characterized in that, described fluid configuration assembly comprises: The intermediate container is connected to the reaction kettle through a first pipeline, and the first pipeline is sequentially provided with a first valve, a preheater and a second valve from one end close to the intermediate container to an end close to the reaction kettle ; A gas cylinder is connected to the intermediate container through a second pipeline, and a third valve and a gas booster pump are arranged on the second pipeline; The pressure vessel is connected to the intermediate vessel through a third pipeline, and a fourth valve and a first constant pressure and constant flow pump are arranged on the third pipeline. 4. The water-rock reaction device for simulating atmospheric precipitation fluid and surrounding rock according to claim 3, wherein carbon dioxide gas is stored in the gas cylinder, and water is stored in the pressure vessel. 5. the water-rock reaction device of simulated atmospheric precipitation fluid and surrounding rock according to claim 1, is characterized in that, described reflux structure comprises: A separator, the input end of the separator is connected to the chemical signal acquisition structure through a fourth pipeline, and a back pressure valve is arranged on the fourth pipeline; The second constant pressure and constant flow pump is connected at one end to the first outlet of the separator, and at the other end to the fluid configuration component through a fifth pipeline, and a fifth valve is arranged on the fifth pipeline. 6. The water-rock reaction device for simulating atmospheric precipitation fluid and surrounding rock according to claim 5, wherein a sixth valve is arranged on the second outlet of the separator. 7 . The water-rock reaction device for simulating atmospheric precipitation fluid and surrounding rock according to claim 3 , wherein the injection drive assembly is the first constant pressure and constant flow pump. 8. A water-rock reaction method for simulating atmospheric precipitation fluid and surrounding rock, utilizing the water-rock reaction device for simulating atmospheric precipitation fluid and surrounding rock according to any one of claims 1-7, it is characterized in that the method comprises : configuring a first simulated atmospheric precipitation fluid in the fluid configuration component; Injecting the first simulated atmospheric precipitation fluid into a reactor filled with rock samples; reacting the first simulated atmospheric precipitation fluid with the rock sample at a first set temperature and a first set pressure; Monitoring the first chemical parameters in the first reaction fluid discharged from the reactor after the first simulated atmospheric precipitation fluid reacts with the rock sample. 9. the water-rock reaction method of simulated atmospheric precipitation fluid and surrounding rock according to claim 8, is characterized in that, described configuration first simulated atmospheric precipitation fluid in fluid configuration assembly comprises: injecting water into the fluid configuration assembly; Injecting carbon dioxide gas into the fluid configuration assembly containing water to form a carbon dioxide solution in the fluid configuration assembly; controlling the pressure of the carbon dioxide solution by controlling the injection amount of the carbon dioxide gas; The carbon dioxide solution is preheated to form the first simulated atmospheric precipitation fluid. 10. the water-rock reaction method of simulated atmospheric precipitation fluid and surrounding rock according to claim 9, is characterized in that, the reaction that described reactor discharges after described monitoring described first simulated atmospheric precipitation fluid reacts with rock sample After the chemical parameters in the fluid also include: configuring a second simulated atmospheric precipitation fluid in the fluid configuration component; Injecting the second simulated atmospheric precipitation fluid into the reactor; reacting the second simulated atmospheric precipitation fluid with the rock sample at a second set temperature and a second set pressure; Monitoring the second chemical parameter in the second reaction fluid discharged from the reactor after the second simulated atmospheric precipitation fluid reacts with the rock sample.

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