An apparatus and method for high temperature geothermal fluid non-condensable gas measurement

Abstract

The application discloses a device and method for measuring non-condensable gas of high-temperature geothermal fluid, belonging to the field of high-temperature geothermal reservoir engineering testing, and comprises a water vapor separator (2) and a non-condensable gas collecting device (9) connected in sequence, wherein the non-condensable gas collecting device (9) comprises a non-condensable gas collecting tank (10) and an inlet and outlet water adjusting tank (12) which are communicated through a connecting graduated tube (11), and corresponding valves and connecting pipes are further arranged; the measuring method is to convert the collected non-condensable gas into the mass of gas, measure the mass of the discharged water in the water collecting tank, and thus calculate the mass ratio of the non-condensable gas; the application can obtain accurate and reliable mass concentration data of the non-condensable gas in the fluid, is suitable for single-well productivity testing, geothermal resource assessment, geothermal field production monitoring and other fields of high-temperature geothermal fields, and provides reliable data for high-temperature geothermal field scale prevention and scale inhibition and power plant unit design.

Description

Technical Field

[0001] The present invention relates to the field of high-temperature geothermal field heat storage engineering testing, and in particular to a device and method for measuring non-condensable gas in high-temperature geothermal fluid. Background Art

[0002] Scaling is a common problem in geothermal systems during operation, and they all face scaling issues in wellbores and pipelines. In shallow geothermal wells at the Yangbajing geothermal field, a typical geothermal field in Tibet, carbonate scale is the most common scaling type, severely impacting production at the Yangbajing field. Scaling issues also exist at other geothermal fields on the Tibetan Plateau. To prevent and control scaling in high-temperature geothermal wells, it is necessary to add scale inhibitors below the flash evaporation surface. Therefore, determining the location of the flash evaporation surface is a pressing issue. Many scholars at home and abroad have studied flash evaporation trends and scaling locations, analyzing the main influencing factors as the heat reservoir pressure, flow rate, and carbon dioxide content in the fluid.

[0003] Carbonate scale generally occurs near and above the flash surface in the wellbore. Generally, calcium-rich high-CO2 fluids are more likely to deposit calcite than CO2-lean fluids. During the production process, changes in CO2 concentration must be monitored to adjust the amount and location of scale inhibitor injection.

[0004] Furthermore, high concentrations of non-condensable gases (non-condensable gases) in power generation systems are common. These gases, primarily carbon dioxide, hydrogen sulfide, hydrogen, methane, nitrogen, helium, and argon, are gases that fail to condense into liquid form with water vapor during the cooling process of geothermal fluids. These gases carry steam with them during discharge, reducing the unit's thermal conversion efficiency. Therefore, accurate measurement of non-condensable gas content is crucial during high-temperature geothermal field capacity testing and production. Summary of the Invention

[0005] One of the purposes of the present invention is to provide a device for measuring non-condensable gases in high-temperature geothermal fluids to solve the above-mentioned problems.

[0006] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is as follows: a device for measuring non-condensable gas in high-temperature geothermal fluid, including a steam-water separator, wherein the outlet end of the steam-water separator is respectively connected to a liquid phase cooling pool and a gas phase cooling pool, the other end of the liquid phase cooling pool is connected to a non-condensable gas collecting device through a liquid phase water inlet pipe, and the other end of the gas phase cooling pool is also connected to a non-condensable gas collecting device through a gas phase water inlet pipe, and the non-condensable gas collecting device is connected to a water collecting tank through a water outlet pipe, wherein the non-condensable gas collecting device includes a non-condensable gas collecting tank located at the upper part and an inlet and outlet water regulating tank located at the lower part, the condensable gas collecting tank is connected to the inlet and outlet water regulating tank through a connecting scale tube, and the inlet and outlet water regulating tank is provided with two water inlets and one water outlet, wherein the two water inlets are respectively connected to the liquid phase water inlet pipe and the gas phase water inlet pipe, and the one water outlet is connected to the water outlet pipe.

[0007] As a preferred technical solution, a pressure gauge and a thermometer A are provided on the steam-water separator.

[0008] As a preferred technical solution, the condensed gas collection tank and the inlet and outlet water regulating tanks are both cylindrical tanks.

[0009] As an optimal technical solution, the liquid phase water inlet pipe is provided with a liquid phase water inlet three-way valve, the gas phase water inlet pipe is provided with a gas phase water inlet three-way valve, and the water outlet pipe is provided with a water outlet piston valve.

[0010] As a preferred technical solution, a liquid-phase water inlet effluent pipe connected to the liquid-phase water inlet three-way valve and a gas-phase water inlet effluent pipe connected to the gas-phase water inlet three-way valve are further provided.

[0011] As a preferred technical solution, an external protection frame is further provided on the outside of the condensed gas collection tank and the inlet and outlet water regulating tank.

[0012] A second object of the present invention is to provide a method for measuring non-condensable gas in high-temperature geothermal fluid using the above-mentioned device, the technical solution adopted comprising the following steps:

[0013] (1) Before measurement, turn the non-condensable gas collection device upside down, fill it with liquid from the outlet pipe connected to the inlet and outlet water regulating tank, open the two water inlets to exhaust the gas in the device, and then put the non-condensable gas collection device upright;

[0014] (2) Open the main valve, connect the liquid phase water inlet three-way valve and the gas phase water inlet three-way valve to the corresponding external drain pipe to drain water, and after the temperature and pressure of the steam-water separator are stable, connect the liquid phase water inlet three-way valve and the gas phase water inlet three-way valve to the inlet and outlet water regulating tank, and connect the condensed liquid, water vapor and non-condensable gas to the non-condensable gas collection device;

[0015] The non-condensable gas is collected at the top of the non-condensable gas collection tank, and the liquid is discharged into the water collecting tank from the bottom of the inlet and outlet water regulating tank;

[0016] The water level in the water collecting tank is consistent with the middle scale height of the connected scale tube, and the outlet pipe is immersed below the water surface of the water collecting tank before the measurement is completed;

[0017] After the gas-water interface reaches the connecting graduated tube (the graduated tube is used to measure the volume of gas in the non-condensable gas collection tank, and its quantity is read by the scale, and the specific range of the scale is 7480mL~7550mL), close the liquid phase water inlet three-way valve and the gas phase water inlet three-way valve at the same time, and make the three-way valves drain sideways; wait until the gas and liquid in the non-condensable gas collection device are completely separated and the liquid level in the connecting graduated tube is stable, then close the water outlet piston valve; finally, close the main valve;

[0018] (4) After closing the outlet piston valve, collect the liquid in the outlet pipe into the water collection tank;

[0019] (5) Record data: Simultaneously record the temperature of the non-condensable gas collection tank (T) and the scale on the connected scale tube (V 气 ); use an electronic scale to measure the weight of the discharged liquid (V 水 ) (i.e., the weight of the liquid in the collecting tank); and record the atmospheric pressure (P);

[0020] (6) Data analysis: Based on the composition and volume of non-condensable gases, the average molecular weight of the gases with a volume ratio exceeding 1% is calculated, and the mass ratio of the non-condensable gases in the geothermal fluid is further calculated.

[0021] As a preferred technical solution, in step (6), the data analysis includes:

[0022] 1) Laboratory analysis of non-condensable gas components, calculation of the average molecular weight of the gas, only the gas with a volume fraction exceeding 1% is calculated;

[0023] The specific analysis method is to use gas chromatograph in the laboratory, instrument model: PE.Clarus600, determination method: GB / T 13610 Natural gas composition analysis gas chromatography method;

[0024] It should be noted that the reason why only gases with a volume fraction of more than 1% are calculated is that the effect of gases with a volume fraction of less than 1% on the calculated gas average molecular weight is less than 0.01, and has no significant effect on the measurement accuracy.

[0025] The calculated average molecular weight (M ra ) is:

[0026]

[0027] Among them, M i is the molecular weight of the i-th gas, V i is the volume ratio of the i-th gas.

[0028] 2) Calculate the mass of non-condensable gas according to the ideal gas state equation. The calculation formula is:

[0029] M 气 =M ra P 气 V 气 / (RT) (2)

[0030] Where M 气 Represents the mass of non-condensable gas, unit is kg;

[0031] M ra Represents the average molecular weight of non-condensable gas;

[0032] P 气 Represents the atmospheric pressure measured on site, unit: Pa;

[0033] V 气 Represents the volume of non-condensable gas measured on site, in m 3 ;

[0034] R represents the proportionality constant, 8.314 J / (mol·K);

[0035] T represents the temperature of the non-condensable gas storage tank measured on site, in K;

[0036] According to the mass of non-condensable gas and liquid weight (V 水 ), calculate the mass ratio of non-condensable gas in the liquid phase (n l ), the calculation formula is:

[0037] n l =M 气 / ( M 气 +V 水 ) (3).

[0038] The measuring device of the present invention separates, cools and compresses the geothermal fluid, and then enters the non-condensable gas collection device, converts the collected non-condensable gas into gas mass, measures the mass of the drainage in the water collection tank, and calculates the mass ratio of the non-condensable gas.

[0039] The device and method provided by the present invention for measuring non-condensable gas in high-temperature geothermal fluids, which measures the weight ratio of non-condensable gas, are of great significance for the design of high-temperature geothermal units, research on scale prevention and inhibition of geothermal wells, and the amount and location of scale inhibitor injection.

[0040] Compared with the existing technology, the advantages of the present invention are: the non-condensable gas measurement device and method of the present invention can obtain accurate and reliable non-condensable gas mass concentration data in the fluid, and is suitable for single well productivity testing, geothermal resource assessment, geothermal field production monitoring and other fields of high-temperature geothermal fields. It can be used to measure non-condensable gases in wellhead fluids of high-temperature geothermal fields in Tibet, Sichuan, Yunnan, Xinjiang and other places in my country, providing reliable data for scale prevention and control of high-temperature geothermal fields and design of power plant units, thereby providing a reference for corresponding decision-making; the present invention improves measurement accuracy through multiple measurements, obtains the concentration of non-condensable gases, and the data is accurate and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 This is a diagram of a device for measuring non-condensable gas in high-temperature geothermal fluid according to Example 1 of the present invention;

[0042] Figure 2 This is a flow chart for measuring non-condensable gas in warm geothermal fluid according to Example 2 of the present invention.

[0043] In the figure: 1. Main valve; 2. Steam-water separator; 3. Pressure gauge; 4. Thermometer A; 5. Liquid-phase cooling tank; 6. Gas-phase cooling tank; 7. Liquid-phase water inlet pipe; 8. Gas-phase water inlet pipe; 9. Non-condensable gas collection device; 10. Non-condensable gas collection tank; 11. Connecting scale tube; 12. Inlet and outlet water regulating tank; 13. Thermometer B; 14. External protection frame; 15. Liquid-phase water inlet three-way valve; 16. Gas-phase water inlet three-way valve; 17. Liquid-phase water inlet external discharge pipe; 18. Gas-phase water inlet external discharge pipe; 19. Water outlet piston valve; 20. Water outlet pipe; 21. Water collecting tank. DETAILED DESCRIPTION

[0044] The present invention will be further described below with reference to the accompanying drawings.

[0045] Example 1:

[0046] See also Figure 1A device for measuring non-condensable gas in high-temperature geothermal fluids includes a water-gas separator 2 (commercially available, manufacturer: Wuxi Qibote Environmental Protection Technology Co., Ltd., model: L15). A pipeline is connected to the inlet end of the water-gas separator. A main valve 1 is provided on the pipeline, and its outlet ends are connected to a liquid cooling pool 5 and a gas cooling pool 6, respectively. The other end of the liquid cooling pool 5 is connected to a non-condensable gas collection device 9 through a liquid water inlet pipe 7, and the other end of the gas cooling pool 6 is also connected to the non-condensable gas collection device through a gas water inlet pipe 8. 9, the non-condensable gas collection device 9 is connected to the water collecting tank 21 through the water outlet pipe 20, wherein the non-condensable gas collection device 9 includes a non-condensable gas collection tank 10 located at the upper part and an inlet and outlet water regulating tank 12 located at the lower part, the condensable gas collection tank 10 is connected to the inlet and outlet water regulating tank 12 through a connecting scale tube 11, and the inlet and outlet water regulating tank 12 is provided with two water inlets and one water outlet, wherein the two water inlets are respectively connected to the liquid phase water inlet pipe 7 and the gas phase water inlet pipe 8, and the one water outlet is connected to the outlet pipe 20;

[0047] In this embodiment, a pressure gauge 3 and a thermometer A4 are provided on the steam-water separator 2, and a thermometer B13 is provided on the condensed gas collection tank 10. The condensed gas collection tank 10 and the inlet and outlet water regulating tank 12 are both cylindrical tanks;

[0048] The liquid phase water inlet pipe 7 is provided with a liquid phase water inlet three-way valve 15, the gas phase water inlet pipe 8 is provided with a gas phase water inlet three-way valve 16, and the water outlet pipe 20 is provided with a water outlet piston valve 19;

[0049] A liquid-phase water inlet effluent pipe 17 connected to the liquid-phase water inlet three-way valve 15 and a gas-phase water inlet effluent pipe 18 connected to the gas-phase water inlet three-way valve 16 are also provided;

[0050] An outer protection frame 14 is further provided on the outside of the condensed gas collection tank 10 and the inlet and outlet water regulating tank 12;

[0051] In this embodiment, the inlet and outlet water regulating tank 12, the non-condensable gas collection tank 10, the connecting graduated tube 11, the liquid phase water inlet three-way valve 15, the gas phase water inlet three-way valve 16, and the outlet piston valve 19 are all made of high-temperature resistant borosilicate glass; the outer protective frame 14 is made of steel; and the connecting pipes between the various devices are all silicone hoses;

[0052] Specifications and models of the main equipment in this embodiment:

[0053] The inlet and outlet water regulating tank 12 is a cylindrical tank with a diameter of 20 cm, a height of 15 cm, and a wall thickness of 4 mm; the non-condensable gas collection tank 10 is a cylindrical tank with a diameter of 20 cm, a height of 25 cm, and a wall thickness of 4 mm; the connecting scale tube 11 is a cylindrical body with a diameter of 3.6 cm, a height of 10 cm, and a wall thickness of 3 mm;

[0054] The outer protection frame 14 is a cube and is used to fix the inlet and outlet water regulating tank 12 and the non-condensable gas collection tank 10. The internal dimensions are 20.6cm*20.6cm*50.6cm. Shock-absorbing pads with a thickness of 3mm are set on the sides, top and bottom to protect the non-condensable gas collection device during transportation and use. Four support feet with a height of 15cm are set under the protection frame.

[0055] The silicone hose connecting each device is 24# hose, 6.4mm×11.4mm;

[0056] The two water inlet pipes of the inlet and outlet water regulating tank 12 are three-way valves, which are connected to the inlet and outlet water regulating tanks on the top. The water inlet pipe enters the inlet and outlet water regulating tanks 3 cm, and the bottom and side are pagoda (pagoda connector is a commonly used connector for quick connection of hydraulic oil circuits and air pressure pipelines, which is convenient for connecting hoses) connectors with an outer diameter of 6.4mm;

[0057] The water outlet is a piston valve, connected to the bottom of the water inlet and outlet regulating tank, and has a pagoda connector at the bottom, with a diameter of 6.4mm;

[0058] An industrial-grade thermocouple temperature probe is installed in the middle of the non-condensable gas collection tank;

[0059] The pressure gauge is a special model for plateau use (manufacturer: Shanghai Dumai Automation Technology Co., Ltd., model: DYM3-1).

[0060] Example 2

[0061] A method for measuring non-condensable gas in high-temperature geothermal fluid using the device of Example 1 comprises the following steps:

[0062] (1) Before measurement, invert the non-condensable gas collection device 9 and pour liquid into it through the outlet pipe 20 located in the middle of the inlet and outlet water regulating tank 12. Open the two water inlet three-way valves 15 for the liquid phase and 16 for the gas phase to exhaust the gas in the device.

[0063] (2) Then put the non-condensable gas collecting device 9 upright; connect the silicone hose liquid phase water inlet pipe 7, gas phase water inlet pipe 8, liquid phase water inlet external discharge pipe 17, gas phase water inlet external discharge pipe 18 and water outlet pipe 20; keep the whole device firm and stable;

[0064] (3) Open the main valve 1, connect the liquid-phase water inlet three-way valve 15 and the gas-phase water inlet three-way valve 16 to the liquid-phase water inlet external discharge pipe 17 and the gas-phase water inlet external discharge pipe 18 respectively to drain water. After the values ​​displayed by the pressure gauge 3 and the thermometer A4 on the steam-water separator 2 stabilize, connect the liquid-phase water inlet three-way valve 15 and the gas-phase water inlet three-way valve 16 to the inlet and outlet water regulating tank 12, and connect the condensed liquid, water vapor and non-condensable gas to the non-condensable gas collection device 9;

[0065] (4) Non-condensable gas is collected at the top of the non-condensable gas collection tank 10, and the liquid is discharged from the water outlet piston valve 19 at the bottom of the inlet and outlet water regulating tank 12, together with the liquid and condensed steam entering the inlet and outlet water regulating tank 12, through the water outlet piston valve 19 and discharged into the water collecting tank 21;

[0066] (5) The water level in the water collecting tank 21 is consistent with the middle scale height of the connected graduated tube 11, and the outlet pipe 20 is immersed below the water surface of the water collecting tank 21 before the measurement is completed;

[0067] (6) After the gas-water interface reaches the connecting graduated tube 11, close the liquid phase water inlet three-way valve 15 and the gas phase water inlet three-way valve 16 at the same time, so that the two three-way valves can drain water laterally; after the gas and liquid in the non-condensable gas collecting device 9 are stable and the liquid level in the connecting tube 11 is stable, close the water outlet piston valve 19; finally, close the main valve 1;

[0068] (7) After closing the water outlet piston valve 19, the liquid in the water outlet pipe 20 between the water outlet piston valve 19 and the water collecting tank 21 is collected in the water collecting tank 21;

[0069] (8) Record data: Simultaneously record the temperature (T) of the non-condensable gas collection tank 10 and the scale (V 气 ); Use an electronic scale to measure the weight of the discharged liquid collected in the water collecting tank 21 in step (7) (V 水 ); record atmospheric pressure (data measured by pressure gauge DYM3-1) (P);

[0070] Notes during the above non-condensable gas measurement process:

[0071] (1) The non-condensable gas collection device 9 is preferably filled with cooled geothermal well fluid, so as to avoid scaling caused by contact between water bodies of different water chemical components;

[0072] (2) After the steam-water separator 2 has stabilized, the non-condensable gas collecting device 9 is re-introduced with water. The valve opening sequence is: first, open the water outlet piston valve 19, and then simultaneously open the liquid phase water inlet three-way valve 15 and the gas phase water inlet three-way valve 16; at the end of the measurement, the valve closing sequence is: simultaneously close the liquid phase water inlet three-way valve 15 and the gas phase water inlet three-way valve 16, and then close the water outlet piston valve 19 after the gas-liquid interface of the connected calibration tube 11 stabilizes;

[0073] (3) The water level in the water collecting tank 21 is consistent with the height of the connecting pipe scale 11; before the measurement is completed, the outlet pipe 20 is immersed below the water level in the water collecting tank 21. After the water inlet three-way valve is closed, it is normal for water to flow back into the outlet pipe 20;

[0074] (4) Simultaneously record the temperature (T) of the non-condensable gas collection tank 10 and the scale (V 气 );

[0075] Step 6: Data analysis includes:

[0076] (1) Laboratory analysis of non-condensable gas components, calculation of the average molecular weight of the gas, and only the gas with a volume fraction exceeding 1%;

[0077] According to the laboratory non-condensable gas components, the average molecular weight (M ra )

[0078]

[0079] M i - molecular weight of the i-th gas, V i -The volume ratio of the i-th gas;

[0080] This example takes a well in the Gulu geothermal field as an example. The well is a high-temperature geothermal well. According to laboratory analysis, the gases with a volume ratio exceeding 1% in the geothermal well are CO2, N2, and O2, and their volume ratios are 0.752, 0.165, and 0.0533, respectively. The average molecular weight (M) is calculated using the above formula (1). ra ) is 40.82;

[0081] (2) Calculate the mass of non-condensable gas based on the ideal gas state equation

[0082] M 气 =M ra P 气 V 气 / (RT) (2)

[0083] According to the mass of carbon dioxide and the weight of liquid (V 水 ), calculate the mass ratio of non-condensable gas in the liquid phase (n l );

[0084] n l =M co2 / (M co2 +V 水 ) (3)

[0085] Three sets of data were measured on-site, and the mass ratio of non-condensable gases was calculated. The atmospheric pressure measured on-site at the Gulu geothermal field was 576 hPa. The measured values ​​of each parameter are detailed in Table 1. The calculated average non-condensable gas content in the geothermal fluid was 0.281%.

[0086] Table 1 Calculation results of the mass ratio of non-condensable gas in a well in the Gulu geothermal field

[0087]

[0088] The device and measurement method implemented by the embodiments of the present invention can be used for geothermal fluids in all temperature ranges, such as medium and high temperature geothermal field production wells and production pipelines, and are simple and safe to operate, and the data are accurate and reliable.

[0089] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A device for measuring non-condensable gas in high-temperature geothermal fluid, characterized in that: The invention comprises a steam-water separator (2), wherein the outlet end of the steam-water separator is connected to a liquid phase cooling pool (5) and a gas phase cooling pool (6) respectively, the other end of the liquid phase cooling pool (5) is connected to a non-condensable gas collecting device (9) via a liquid phase water inlet pipe (7), the other end of the gas phase cooling pool (6) is also connected to the non-condensable gas collecting device (9) via a gas phase water inlet pipe (8), and the non-condensable gas collecting device (9) is connected to a water collecting tank (21) via a water outlet pipe (20), wherein the non-condensable gas The condensed gas collection device (9) comprises a non-condensable gas collection tank (10) located at the upper portion and an inlet and outlet water regulating tank (12) located at the lower portion, wherein the condensed gas collection tank (10) is connected to the inlet and outlet water regulating tank (12) via a connecting graduated tube (11), and the inlet and outlet water regulating tank (12) is provided with two water inlets and one water outlet, wherein the two water inlets are respectively connected to a liquid phase water inlet pipe (7) and a gas phase water inlet pipe (8), and the one water outlet is connected to a water outlet pipe (20); The condensed gas collection tank (10) and the inlet and outlet water regulating tank (12) are both cylindrical tank bodies; The liquid phase water inlet pipe (7) is provided with a liquid phase water inlet three-way valve (15), the gas phase water inlet pipe (8) is provided with a gas phase water inlet three-way valve (16), and the water outlet pipe (20) is provided with a water outlet piston valve (19); A liquid-phase water inlet vent pipe (17) connected to the liquid-phase water inlet three-way valve (15) and a gas-phase water inlet vent pipe (18) connected to the gas-phase water inlet three-way valve (16) are also provided.

2. The device according to claim 1, characterized in that The steam-water separator (2) is provided with a pressure gauge (3) and a thermometer A (4).

3. The device according to claim 1, characterized in that An outer protection frame (14) is also provided on the outside of the condensed gas collection tank (10) and the inlet and outlet water regulating tank (12).

4. A method for measuring non-condensable gas in high-temperature geothermal fluid using the device according to any one of claims 1 to 3, characterized in that: The steps include: (1) Before measurement, turn the non-condensable gas collecting device (9) upside down, pour liquid into the water outlet pipe (20) connected to the water inlet and outlet regulating tank (12), open the two water inlets to exhaust, exhaust the gas in the device, and then put the non-condensable gas collecting device (9) upright; (2) Open the main valve (1), connect the liquid phase water inlet three-way valve (15) and the gas phase water inlet three-way valve (16) to the corresponding external drain pipes for drainage, and after the temperature and pressure of the steam-water separator (2) are stabilized, connect the liquid phase water inlet three-way valve (15) and the gas phase water inlet three-way valve (16) to the inlet and outlet water regulating tank (12), and connect the condensed liquid, water vapor and non-condensable gas to the non-condensable gas collection device (9); The non-condensable gas is collected at the top of the non-condensable gas collecting tank (10), and the liquid is discharged from the lower part of the water inlet and outlet regulating tank (12) into the water collecting tank (21); the water level in the water collecting tank (21) is consistent with the middle scale height of the connecting scale tube (11), and the outlet of the water pipe (20) is immersed below the water surface of the water collecting tank (21) before the measurement is completed; (3) After the gas-water interface reaches the connection scale tube (11), close the liquid phase water inlet three-way valve (15) and the gas phase water inlet three-way valve (16) at the same time, and drain the water in the three-way valves sideways; wait until the gas and liquid in the non-condensable gas collection device (9) are completely separated and the liquid level in the connection scale tube (11) is stable, then close the water outlet piston valve (19); finally, close the main valve; (4) After closing the water outlet piston valve (19), the liquid in the water outlet pipe (20) is collected in the water collecting tank (21); (5) Recording data: Simultaneously record the temperature (T) of the non-condensable gas collection tank (10) and the scale (Vgas) on the connecting graduated tube (11); measure the weight of the discharged liquid (Vwater) using an electronic scale; and record the atmospheric pressure (P); (6) Data analysis: Based on the composition and volume of non-condensable gases, the gas average molecular weight is calculated for gases with a volume ratio exceeding 1%, and the mass ratio of non-condensable gases in geothermal fluids is further calculated; In step (6), the data analysis includes: 1) Laboratory analysis of non-condensable gas components, calculation of the average molecular weight of the gas, only the gas with a volume fraction exceeding 1% is calculated; The formula for calculating the average molecular weight (Mra) is: ， Among them, M i is the molecular weight of the i-th gas, V i is the volume ratio of the i-th gas; 2) Calculate the mass of non-condensable gas according to the ideal gas state equation. The calculation formula is: M 气 =M ra P 气 V 气 / (RT) (2), Where M 气 Represents the mass of non-condensable gas, unit is kg; M ra represents the average molecular weight of non-condensable gases; P 气 Represents the atmospheric pressure measured on site, unit: Pa; V 气 Represents the volume of non-condensable gas measured on site, in m 3 ; R represents the proportionality constant, 8.314 J / (mol·K); T represents the temperature of the non-condensable gas storage tank measured on site, in K; According to the mass of non-condensable gas and liquid weight (V 水 ), calculate the mass ratio of non-condensable gas in the liquid phase (n l ), the calculation formula is: n l =M 气 / ( M 气 +V 水 ) (3)。

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