Detection Device and Detection Method for CO₂ Storage Quantity in Water-Based Drilling Fluid

Abstract

The present application provides a detection device and a detection method for the CO2 storage amount in a water-based drilling fluid. The detection device for the CO2 storage amount in the water-based drilling fluid includes a reaction kettle, which is set as a sealed structure and is filled with the water-based drilling fluid; a pressurizing mechanism, the outlet of which is communicated with the reaction kettle to inject pressurized carbon dioxide into the water-based drilling fluid; and a detection device, which can detect the change amount of the carbon dioxide in the reaction kettle, and this change amount is the CO2 storage amount of the water-based drilling fluid. In the present application, the reaction kettle filled with the water-based drilling fluid is connected to the pressurizing mechanism, so that the water-based drilling fluid in the reaction kettle can be in the environment at the deep drilling depth. Carbon dioxide is injected into the water-based drilling fluid through the pressurizing mechanism to determine the amount of carbon dioxide that the water-based drilling fluid can absorb, thereby being able to quantitatively measure the CO2 storage amount of the water-based drilling fluid.

Description

Technical Field

[0001] This application belongs to the technical field of oil exploration, and particularly relates to a detection device and a detection method for the amount of CO2 stored in a water-based drilling fluid. Background Art

[0002] In China, the reserves of high-CO2 gas reservoirs are very large and relatively concentrated. For example, high-CO2 reservoirs have been discovered in the Qiongdongnan, Yinggehai, and Pearl River Mouth Basins in the western South China Sea. The acidic gas reservoirs with high CO2 content underground will cause complex problems such as the deterioration of the rheological properties and filtration and wall-building properties of the drilling fluid used in the drilling process. The main manifestations are a large increase in the viscosity, shear force, and filtration loss of the drilling fluid. This phenomenon is particularly prominent in high-density water-based drilling fluids. Since high-density water-based drilling fluids belong to relatively thick colloidal suspension systems, with characteristics such as high solid content, high dispersibility, low free water, and sensitivity to pollutants, when CO2 acidic gas invades the high-density water-based drilling fluid, CO3 2+ , HCO3 - are first generated. CO3 2+ / HCO3 - also reacts with high-valent cations such as OH - , Ca 2+ , Mg 2+ , Ba 2+ , Al 3+ in the water-based drilling fluid, changing the drilling fluid medium environment and the thermodynamic properties of the colloidal suspension system, and affecting the rheological properties and filtration and wall-building properties of the drilling fluid system.

[0003] Due to the chemical reaction characteristics of CO2, there is a large deviation between the online logging gas content and the actual content in the formation / wellbore, and even CO2 cannot be detected. Based on the inaccurate detection of the CO2 content, a blowout accident may occur, ultimately affecting drilling safety and well completion judgment. Therefore, the analysis and detection of quantitatively evaluating the amount of CO2 stored in the water-based drilling fluid has become an urgent problem to be solved in deep well drilling and logging work. Summary of the Invention

[0004] Therefore, this application provides a detection device and a detection method for the amount of CO2 stored in a water-based drilling fluid, which can solve the problem that the amount of CO2 stored in the water-based drilling fluid in the prior art cannot be accurately detected.

[0005] To solve the above problems, this application provides a detection device for the amount of carbon dioxide stored in a water-based drilling fluid, including:

[0006] A reaction kettle, which is set as a sealed structure and is filled with a water-based drilling fluid;

[0007] A pressurizing mechanism, the outlet of which is connected to the reaction kettle to inject pressurized carbon dioxide into the water-based drilling fluid;

[0008] A detection device capable of detecting the change amount of the carbon dioxide in the reaction kettle, and this change amount is the carbon dioxide storage amount of the water-based drilling fluid.

[0009] Optionally, the pressurizing mechanism includes a booster pump. The inlet of the booster pump is connected to a carbon dioxide gas source, and the outlet extends into the water-based drilling fluid.

[0010] Optionally, the inlet of the booster pump is also communicated with the outlet of an air compressor.

[0011] Optionally, a stirring structure is provided on the reaction kettle, which can stir the water-based drilling fluid in the reaction kettle.

[0012] Optionally, a heating mechanism is provided on the reaction kettle, which can heat-treat the water-based drilling fluid in the reaction kettle.

[0013] Optionally, the detection device includes a pressure sensor, a temperature sensor and a flow detector. The pressure sensor can detect the pressure in the reaction kettle, the temperature sensor can detect the temperature in the reaction kettle, and the flow detector can detect the amount of carbon dioxide entering and leaving the reaction kettle.

[0014] Optionally, there are two flow detectors. One is arranged between the carbon dioxide gas source and the inlet of the booster pump, and the other is arranged on the exhaust pipeline of the reaction kettle.

[0015] Optionally, the detection device further includes a controller, and the pressure sensor, the temperature sensor and the flow detector are all connected to the controller.

[0016] According to another aspect of the present application, a detection method of the above-mentioned detection device is provided, including:

[0017] Inject water-based drilling fluid into the reaction kettle;

[0018] Regulate the pressurizing mechanism to inject pressurized carbon dioxide gas into the reaction kettle;

[0019] After the reaction between carbon dioxide and the water-based drilling fluid reaches saturation, detect the reduction amount of carbon dioxide.

[0020] Optionally, the detection method further includes:

[0021] Inject a sample solution into the reaction kettle, and the sample solution is a solution obtained by removing cations from the water-based drilling fluid;

[0022] Regulate the pressurizing mechanism to inject pressurized carbon dioxide gas into the reaction kettle;

[0023] After the reaction between carbon dioxide and the sample solution reaches saturation, detect the reduction amount of carbon dioxide.

[0024] A detection device for the carbon dioxide storage capacity in a water-based drilling fluid provided by this application includes: a reaction kettle, which is set as a sealed structure and filled with the water-based drilling fluid; a pressurizing mechanism, the outlet of which is communicated with the reaction kettle to inject pressurized carbon dioxide into the water-based drilling fluid; a detection device, which can detect the change amount of the carbon dioxide in the reaction kettle, and this change amount is the carbon dioxide storage capacity of the water-based drilling fluid.

[0025] In this application, the reaction kettle filled with the water-based drilling fluid is connected to the pressurizing mechanism, which can make the water-based drilling fluid in the reaction kettle in the environment of the deep drilling. Carbon dioxide is injected into the water-based drilling fluid through the pressurizing mechanism to determine the amount of carbon dioxide that the water-based drilling fluid can absorb, so as to be able to quantitatively measure the carbon dioxide storage capacity of the water-based drilling fluid. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic structural diagram of the detection device for the carbon dioxide storage capacity in the water-based drilling fluid according to the embodiment of this application.

[0027] The reference signs are shown as:

[0028] 1. CO2 gas cylinder; 2. Air compressor; 3. Gas booster pump; 4. Reaction kettle. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0029] To make the purpose, technical solutions and advantages of this application clearer, the technical solutions of this application will be clearly and completely described below in conjunction with the specific embodiments of this application and the corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of this application, rather than all the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of this application.

[0030] It should be noted that the terms "first", "second", etc. in the description and claims of this application and the above-mentioned drawings are used to distinguish similar objects, and do not have to be used to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so that the embodiments of this application described here can be implemented in an order other than those illustrated or described here. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device that includes a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0031] Refer to in combination Figure 1As shown, according to an embodiment of the present application, a detection device for the carbon dioxide storage amount in a water-based drilling fluid includes:

[0032] A reaction kettle 4, which is set as a sealed structure and is filled with a water-based drilling fluid therein;

[0033] A pressurizing mechanism, the outlet of which is communicated with the reaction kettle 4 to inject pressurized carbon dioxide into the water-based drilling fluid;

[0034] A detection device, which can detect the change amount of the carbon dioxide in the reaction kettle 4, and this change amount is the carbon dioxide storage amount of the water-based drilling fluid.

[0035] In the present application, the reaction kettle 4 filled with the water-based drilling fluid is connected to the pressurizing mechanism, which can make the water-based drilling fluid in the reaction kettle 4 in the environment at the deep drilling depth. Carbon dioxide is injected into the water-based drilling fluid through the pressurizing mechanism to determine the amount of carbon dioxide that the water-based drilling fluid can absorb, so as to quantitatively measure the carbon dioxide storage amount of the water-based drilling fluid.

[0036] Due to the great differences in the properties of the drilling fluid itself (cation content, OH - content, etc.) and the formation environments (temperature, pressure, etc.) of different oil and gas field blocks, these factors will have a great impact on the CO2 storage amount. In the present application, by setting a simulated drilling environment in the reaction kettle 4, the environmental conditions of oil and gas fields in different regions can be simulated, and at the same time, the corresponding drilling fluid can be formulated and selected; even changed with the change of actual environmental parameters, the detection device is used to obtain the CO2 storage amount of the water-based drilling fluid in the corresponding environment, and a storage amount calculation model is constructed. Finally, through indoor experiments, this model can be popularized and applied to actual drilling calculations, laying a foundation for analyzing the CO2 storage amount in the water-based drilling fluid in the wellbore.

[0037] In some embodiments, the pressurizing mechanism includes a booster pump 3, the inlet of which is connected to a carbon dioxide gas source, and the outlet extends into the water-based drilling fluid.

[0038] By connecting a carbon dioxide gas source such as a carbon dioxide gas cylinder to the inlet of the booster pump 3, high-pressure carbon dioxide can be output to reach the high-pressure condition of actual drilling.

[0039] In some embodiments, the outlet of an air compressor 2 is also communicated with the inlet of the booster pump 3.

[0040] To reduce the consumption of carbon dioxide, the outlet of an air compressor can also be added to the inlet of the booster pump 3, which is equivalent to connecting the air compressor in parallel with the carbon dioxide gas cylinder. It only needs to ensure that the water-based drilling fluid in the reaction kettle 4 can absorb carbon dioxide saturatedly, that is to say, in the high-pressure mixed gas input into the water-based drilling fluid by the booster pump 3, the amount of carbon dioxide is excessive relative to what the water-based drilling fluid can absorb.

[0041] In some embodiments, a stirring structure is provided on the reaction kettle 4, which can stir the water-based drilling fluid in the reaction kettle 4.

[0042] To accelerate the saturation of carbon dioxide in the water-based drilling fluid in the reaction kettle 4, by setting up a stirring structure to stir the water-based drilling fluid, the carbon dioxide can be quickly dispersed, facilitating absorption.

[0043] In some embodiments, a heating mechanism is provided on the reaction kettle 4, which can heat-treat the water-based drilling fluid in the reaction kettle 4.

[0044] When injecting carbon dioxide into the water-based drilling fluid in the reaction kettle 4, it can reach the appropriate temperature by selecting carbon dioxide at an appropriate temperature or by heating the water-based drilling fluid through the heating mechanism after injection. Of course, the heating mechanism can also maintain or change the temperature in the reaction kettle 4.

[0045] In some embodiments, the detection device includes a pressure sensor, a temperature sensor and a flow detector. The pressure sensor can detect the pressure in the reaction kettle 4, the temperature sensor can detect the temperature in the reaction kettle 4, and the flow detector can detect the amount of carbon dioxide entering and leaving the reaction kettle 4.

[0046] By setting up, such as, a pressure sensor, a temperature sensor and a flow detector on the reaction kettle 4, the parameters in the reaction kettle 4 can reach the environmental parameters for actual application, and the carbon dioxide content in the water-based drilling fluid can be effectively and accurately detected. Preferably, there are two flow detectors, one is arranged between the carbon dioxide gas source and the inlet of the booster pump 3, and the other is arranged on the exhaust pipeline of the reaction kettle 4.

[0047] By separately detecting the amount of carbon dioxide entering and leaving the reaction kettle 4 and calculating the difference between the two, the carbon dioxide content in the water-based drilling fluid can be obtained.

[0048] In some embodiments, the detection device further includes a controller, and the pressure sensor, the temperature sensor and the flow detector are all connected to the controller.

[0049] The above detection device can be controlled by connecting to the controller to achieve automatic operation, with convenient and accurate detection.

[0050] According to another aspect of the present application, a detection method for the above detection device is provided, including:

[0051] Inject water-based drilling fluid into the reaction kettle 4;

[0052] Regulate the boosting mechanism and inject pressurized carbon dioxide gas into the reaction kettle 4;

[0053] After the reaction between carbon dioxide and the water-based drilling fluid reaches saturation, the reduction amount of carbon dioxide is detected.

[0054] Optionally, the detection method further includes:

[0055] Inject a sample solution into the reaction kettle 4, and the sample solution is a solution obtained by removing cations from the water-based drilling fluid;

[0056] Regulate the pressurizing mechanism to inject pressurized carbon dioxide gas into the reaction kettle 4;

[0057] After the reaction between carbon dioxide and the sample solution reaches saturation, the reduction amount of carbon dioxide is detected.

[0058] In this application, the temperature and pressure of the reaction kettle 4 are controlled by the pressurization system and the reaction system of the reaction kettle 4 to simulate the temperature and pressure conditions of on-site CO2 immersion in the drilling fluid. A quantitative drilling fluid is added to the reaction kettle 4, and a quantitative CO2 is introduced. After reacting for a period of time (when the drilling fluid reacts with CO2 to reach saturation), the reduction amount of the gas in the reaction kettle 4 is the storage amount (the total amount of reaction amount and dissolution amount). A neutral solution with the same salinity and no high-valent cations equal to the amount of the drilling fluid is added to the reaction kettle 4, and a quantitative CO2 is introduced. After reacting for a period of time (when the solution reacts with CO2 to reach saturation), the reduction amount of the gas in the reaction kettle 4 is the dissolution amount. At this time, the reaction amount is the difference between the storage amount and the dissolution amount.

[0059] The present application is described below through the drawings and specific embodiments for better understanding of the present application.

[0060] The following describes a specific device for measuring the CO2 storage amount in the water-based drilling fluid. Its structure includes a data acquisition and control system, a reaction system of the reaction kettle 4, a gas pressurization system, and a flow control system.

[0061] The data acquisition and control system includes a data collection and controller, a data transmission line of a mass flow controller, a data transmission line of a pressure gauge, a data transmission line of a temperature sensor, a motor speed control line, and a heating device control line. Among them, the data transmission line of the mass flow controller, the data transmission line of the pressure sensor, the data transmission line of the temperature sensor, the motor speed control line, and the heating device control line are sequentially connected to the CO2 cylinder, the outlet valve of the high-temperature and high-pressure reaction kettle 4, an electronic pressure gauge, an electronic thermometer, a motor, and a heating device, and then are all connected to the data acquisition and processor, for transmitting and collecting data such as the temperature, pressure, flow rate, and stirring paddle speed of the reaction kettle 4, and controlling the temperature and speed of the reaction kettle 4.

[0062] The reaction kettle 4 is equipped with an electronic pressure gauge, an electronic thermometer, a temperature sensor, a motor, a stirring paddle, an air inlet valve, a sampling valve, an air outlet valve, a heating device, and a kettle cap. Among them, the motor is connected to the stirring paddle to provide stirring power. The air inlet valve of the reaction kettle 4 is connected to the pressure reducing valve on the booster pump 3 to fill CO2 into the reaction kettle 4. The air outlet is connected to the mass flow controller at the outlet to measure the volume of the remaining gas in the kettle. The heating device is connected to the data collection and controller to control the temperature in the kettle. The electronic pressure gauge, the electronic thermometer, and the temperature sensor are used to measure the temperature and pressure in the reaction kettle 4. The sampling valve is used to take out the samples in the kettle.

[0063] The pressurizing mechanism includes an air compressor 2, a booster pump 3, a pressure measuring tube, a pressure measuring tube, and a PU air tube. Among them, the output port of the air compressor 2 is connected to the booster pump 3 through the PU air tube to provide air source power for the booster pump 3. The air inlet valve of the booster pump 3 is connected to the mass flow controller at the inlet through the pressure measuring tube, and the air outlet valve is connected to the air inlet valve of the reaction kettle 4 through the pressure measuring tube to pressurize the reaction kettle 4.

[0064] The flow control system includes a CO2 gas cylinder 1, a pressure reducing valve, and mass flow controllers at the inlet and outlet. Among them, one end of the flow controller at the inlet is connected to the pressure reducing valve, one end is connected to the air inlet valve of the booster pump 3, and the other end is connected to the data collection and controller through a data transmission line to measure the cumulative volume of CO2 filled. One end of the flow controller at the outlet is connected to the air outlet valve of the reaction kettle 4. The other end is connected to the data collection and controller through a data transmission line to measure the volume of the remaining CO2 in the kettle.

[0065] The construction process of the whole set of devices for measuring the CO2 storage capacity in water-based drilling fluid is as follows:

[0066] (1) Build the CO2 and drilling fluid reaction device

[0067] Connect the data acquisition and control system, the reaction system of the reaction kettle 4, the gas pressurizing system, and the flow control system according to the device Figure 1 After connection, check whether it is loose;

[0068] (2) Detect the airtightness of the device

[0069] Connect the N2 gas cylinder, open the pressure reducing valve, open the kettle cap of the reaction kettle 4, add 1 liter of drilling fluid to the reaction kettle 4, close the kettle cap of the reaction kettle 4, open the air inlet valve of the reaction kettle 4, the air inlet valve of the booster pump 3, the air outlet valve of the booster pump 3, and the air outlet valve of the air compressor 2. Close the air outlet valve and the sampling valve of the reaction kettle 4. When the pressure in the reaction kettle 4 is increased to the preset value through the booster pump 3, close all valves. After waiting for a period of time, if the pressure remains constant at the preset value, the airtightness is good;

[0070] (3) React CO2 gas with drilling fluid under certain temperature and pressure conditions

[0071] Connect the CO2 gas cylinder 1, open the pressure reducing valve of the CO2 gas cylinder 1, the inlet valve of the booster pump 3, and the outlet valve of the booster pump 3. Control the volume of CO2 filled into the reaction kettle 4 through the mass flow controller at the inlet. Open the booster pump 3 and the air compressor 2 to compress CO2 in the reaction kettle 4 to the preset pressure, and start heating the reaction kettle 4. At this time, the device is in the process of pressure increase and temperature rise. Wait until the readings of the pressure gauge and thermometer in the reaction kettle 4 are stable and record the data (initial pressure, initial temperature). Control the temperature in the reaction kettle 4 and the rotation speed of the stirring paddle through the controller, and react for more than 2 hours;

[0072] (4) Sampling and detection

[0073] Close the booster pump 3, the air compressor 2, and the stirring motor in sequence. Slowly open the outlet valve of the high-temperature and high-pressure reaction kettle 4 and wait for the pressure in the reaction kettle 4 to drop to 0. Record the remaining volume of CO2 in the reaction kettle 4 through the mass flow controller at the outlet. At this time, the amount of CO2 filled minus the remaining amount of CO2 is the storage amount (at this time, the storage amount is the sum of the reaction amount and the dissolution amount of CO2). Open the sampling valve of the reaction kettle 4, collect about 150 ml of samples, and measure the changes in the performance parameters of the drilling fluid before and after the reaction (viscosity, pH, cation content, CO3 2- / HCO3 - content). Collect the excess drilling fluid and pour it into the waste liquid pool.

[0074] (5) Measure the dissolution amount

[0075] After cleaning the reaction kettle 4, add 1 L of a neutral solution with the same salinity as the drilling fluid and without high-valent cations to the kettle. According to the above steps, measure the dissolution amount of CO2 gas in the drilling fluid under certain temperature and pressure conditions (the difference between the cumulative amount of CO2 through the mass flow controller at the inlet and the cumulative amount of CO2 through the mass flow controller at the outlet).

[0076] (6) Build a calculation model

[0077] According to the analysis results of each ion concentration and the reaction amount and dissolution amount of CO2 in the drilling fluid, summarize the influence laws of conditions such as temperature, pressure, and each ion concentration on the interaction between CO2 and the drilling fluid, and use the multiple regression analysis method to establish a calculation model for the storage amount of CO2 in the drilling fluid based on the change of ion concentration:

[0078] C T =-0.2032*P + 0.0896*T - 2.4976*PH + 0.00575*Δ[C h + + 0.212*Δ[OH -

[0079] Among them, C T is the storage amount of CO2 in the drilling fluid, with the unit of mol / L; Δ[C h ​+ is the difference between the outlet concentration and the inlet concentration of the high-valence cation, with the unit of mg / L; Δ[OH - is the difference between the outlet concentration and the inlet concentration, with the unit of mol / L; T is the thermodynamic temperature, K; P is the test pressure, MPa.

[0080] Measure the pH, OH of the drilling fluid before and after the reaction between the drilling fluid and CO2 under certain temperature and pressure conditions - , C h + plasma concentration and storage capacity C T , and the experimental data are as follows:

[0081]

[0082] Beneficial effects that this application can bring

[0083] 1. Through the device and method capable of quantitatively evaluating the CO2 storage capacity in water-based drilling fluids, this application establishes a calculation model for the CO2 storage capacity of water-based drilling fluids commonly used in the study area, providing technical services for quantitatively evaluating the CO2 content in the formation during high-alkaline mud logging operations, and achieving the goal of avoiding exploration misjudgment and wrong well completion, and reducing or even avoiding major economic losses and safety accidents.

[0084] 2. The device of this application can control the experimental temperature and pressure to be close to the on-site temperature and pressure in the study area, improving the effectiveness of CO2 storage capacity evaluation.

[0085] 3. Influencing factors such as the pressure, temperature, and flow rate of the experimental device can be controlled and detected in real time through data processing and the controller, making the experiment more convenient and fast, and saving a large amount of time and labor costs.

[0086] 4. Compared with other research methods, this application separately measures the CO2 storage capacity (dissolved amount) in a neutral solution with the same salinity as the water-based drilling fluid and without high-valence cations under different T and P conditions, and summarizes the influence laws of temperature, pressure, and various ion concentrations on the dissolved amount and reaction amount of CO2 in the drilling fluid, and can respectively establish prediction models for the reaction amount and dissolved amount of CO2 in the drilling fluid based on ion concentration changes.

[0087] 4. In on-site work, measure parameters such as T, P, OH - , C h + etc., and use the regression equation for calculation, and summarize T, P, OH - , C h +The influence law of such conditions on the interaction between CO2 and drilling fluid was studied, and a prediction model for the chemical reaction storage of CO2 in drilling fluid based on ion concentration change was established. Using this method, a calculation model for the CO2 storage in the commonly used water-based drilling fluid in the study area can be established, providing technical services for quantitatively evaluating the CO2 content in the formation during the drilling and logging operation with high-alkaline mud.

[0088] It is easy for those skilled in the art to understand that, on the premise of no conflict, the above-mentioned embodiments can be freely combined and superimposed.

[0089] The above are only the preferred embodiments of the present application, and are not intended to limit the present application. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present application shall be included in the protection scope of the present application. The above is only the preferred implementation manner of the present application. It should be noted that for those of ordinary skill in the art, several improvements and modifications can be made without departing from the technical principle of the present application, and these improvements and modifications should also be regarded as the protection scope of the present application.

Claims

1. A detection device for the carbon dioxide content in a water-based drilling fluid, characterized in that, Comprising: A reaction kettle, which is set as a sealed structure and filled with water-based drilling fluid; a stirring structure is provided on the reaction kettle, which can stir the water-based drilling fluid in the reaction kettle, and a heating mechanism is provided on the reaction kettle, which can heat-treat the water-based drilling fluid in the reaction kettle; A pressurizing mechanism, the outlet of which is communicated with the reaction kettle to inject pressurized carbon dioxide into the water-based drilling fluid; the pressurizing mechanism includes a booster pump, the inlet of the booster pump is connected to a carbon dioxide gas source, the outlet extends into the water-based drilling fluid, and the inlet of the booster pump is also communicated with the outlet of an air compressor; A detection device, which can detect the change amount of carbon dioxide in the reaction kettle, and this change amount is the carbon dioxide storage amount of the water-based drilling fluid; The detection device includes a pressure sensor, a temperature sensor and a flow detector. The pressure sensor can detect the pressure in the reaction kettle, the temperature sensor can detect the temperature in the reaction kettle, and the flow detector can detect the amount of carbon dioxide entering and leaving the reaction kettle; There are two flow detectors, one is arranged between the carbon dioxide gas source and the inlet of the booster pump, and the other is arranged on the exhaust pipeline of the reaction kettle; the detection device also includes a controller, and the pressure sensor, the temperature sensor and the flow detector are all connected to the controller.

2. A detection method for the detection device according to claim 1, characterized in that, Comprising: Inject water-based drilling fluid into the reaction kettle; Regulate the pressurizing mechanism to inject pressurized carbon dioxide gas into the reaction kettle; After the reaction between carbon dioxide and the water-based drilling fluid reaches saturation, detect the reduction amount of carbon dioxide.

3. According to the detection method of claim 2, characterized in that, The detection method further includes: Inject a sample solution into the reaction kettle, and the sample solution is a solution obtained by removing cations from the water-based drilling fluid; Regulate the pressurizing mechanism to inject pressurized carbon dioxide gas into the reaction kettle; After the reaction between carbon dioxide and the sample solution reaches saturation, detect the reduction amount of carbon dioxide.

Images