CN205656091U - Volumetric method shale isothermal adsorption experimental apparatus - Google Patents

Abstract

The utility model provides a capacity method shale isothermal adsorption experiment device. The volumetric shale isothermal adsorption experiment device includes an adsorption and desorption unit, a gas injection unit, a constant temperature control unit, a vacuum unit, and a data measurement and acquisition unit. The volumetric shale isothermal adsorption experiment device provided by the utility model can explore the determination of the adsorption capacity of shale samples to CH ₄ /CO ₂ , CH ₄ /N ₂ and other multi-component gases, and the kettle body can resist CO ₂ corrosion during the adsorption process Moreover, the gas in the kettle body is uniform and non-layered, and at the same time, precise control of gas extraction can be achieved at each adsorption equilibrium pressure point; moreover, the volumetric shale isothermal adsorption experimental device can also analyze the methane carbon isotope fractionation effect during the shale gas desorption process. Discussion is carried out to reduce the dilution effect of the free space gas in the adsorption system on the isotope fractionation effect.

Description

A volumetric shale isothermal adsorption experimental device

technical field

The utility model relates to a capacity method shale isothermal adsorption experiment device, which belongs to the field of natural gas exploitation.

Background technique

Natural gas is known as the energy source of the 21st century because of its cleanliness and low pollution. Many countries have listed it as the fuel of choice, and gradually plan to increase its proportion in energy consumption. China's conventional natural gas research is in a stage of rapid development. By the end of 2013, the proven natural gas reserves reached 3.3 trillion cubic meters, but the production volume still cannot keep up with my country's natural gas consumption demand. Therefore, in addition to increasing the development of conventional natural gas reservoirs, attention should also be paid to the development of unconventional natural gas resources with considerable potential. As an important supplement to modern oil and gas reservoirs, shale gas reservoirs have emerged in the field of unconventional natural gas and become a hotspot in the exploration and development of unconventional oil and gas resources in the world. The United States is the first country to carry out shale gas exploration and development, and has achieved great success. According to the results published by BP World Energy Statistics in 2011, the US natural gas production in 2010 was 611×10 ⁹ m ³ , and the shale gas production was 137.9×10 ⁹ m ³ , accounting for 23% of the total US natural gas production in 2010. Compared with the United States, the basic research and exploration and development of shale gas in my country started relatively late, and the research is relatively weak. Therefore, in-depth research on my country's shale gas resources is imminent.

Shale gas is the occurrence and accumulation of natural gas in shale reservoirs. It mainly exists in three states: free, dissolved and adsorbed. Among them, the adsorbed state is the main occurrence state of shale gas, and its proportion in the three states is Up to 85%, adsorption is also an important feature and cause of shale gas accumulation. Therefore, it is particularly important to study the adsorption characteristics of shale gas. At present, the research on the adsorption characteristics of shale refers to the research method of coalbed methane in many aspects. The volumetric method is a common method for high-pressure isothermal adsorption experiments of coal. It has the following problems: 1) The volume of the adsorption tank of the traditional volumetric method instrument is relatively small, and the amount of shale samples that can be loaded in the measurement is small. Since the adsorption amount of shale is much smaller than that of coal, too little shale The pressure drop caused by the sample is very small, and the measurement error is too large; 2) The volume ratio of the traditional volumetric instrument adsorption tank to the standard chamber is about 1:1, which makes the free space volume in the whole system larger. During the carbon isotope fractionation effect in the desorption process, the gas in the free space will have a greater dilution effect on the fractionation effect, and the fractionation effect will become less obvious; 3) CO ₂ gas will be corrosive to a certain extent under high pressure, and the traditional capacity The instrument of this method is generally aimed at the isothermal adsorption of methane by coal, so the material does not pay attention to the corrosion resistance characteristics; 4) When performing the shale competitive adsorption experiment on multi-component gases, due to the difference in the molecular mass of CH ₄ /CO ₂ Stratification will be formed, and the traditional volumetric instrument cannot solve this problem; 5) The traditional volumetric instrument is difficult to accurately control when taking gas, because the adsorption experiment of multiple gases needs to be chromatographically performed on the adsorbed gas sample at each adsorption equilibrium pressure point. Composition analysis, traditional volumetric instruments are not easy to control the gas intake.

Utility model content

In order to solve the above technical problems, the utility model provides a new volumetric shale isothermal adsorption experimental device, which can be used to investigate the adsorption characteristics of shale to methane and multi-component gases and the fractionation effect of carbon isotopes in the desorption process.

The utility model is mainly realized through the following technical solutions:

A volumetric shale isothermal adsorption experimental device, the volumetric shale isothermal adsorption experimental device includes an adsorption and desorption unit, a gas injection unit, a constant temperature control unit, a vacuum unit, and a data measurement and acquisition unit;

The adsorption-desorption unit includes a standard chamber and an adsorption kettle, and the standard chamber communicates with the adsorption kettle;

The gas injection unit includes a first gas cylinder and a second gas cylinder, and the first gas cylinder and the second gas cylinder communicate with the standard chamber respectively;

The constant temperature control unit is a heat preservation mechanism, and the heat preservation mechanism is sleeved on the outside of the standard chamber and the adsorption kettle;

The vacuum unit is a vacuum pump, and the vacuum pump communicates with the standard chamber and the adsorption kettle respectively;

The data measurement and acquisition unit includes a first temperature sensor, a second temperature sensor, a first pressure sensor, a data communication acquisition card and a computer, the standard chamber is provided with the first temperature sensor, and the adsorption kettle is provided with The second temperature sensor, the adsorption kettle is provided with the first pressure sensor, the data communication acquisition card is electrically connected with the first temperature sensor, the second temperature sensor and the first pressure sensor respectively, and the computer and The data communication acquisition cards are electrically connected to each other.

In the above-mentioned volumetric shale isothermal adsorption experiment device, the first gas cylinder is used for filling helium, and the second gas cylinder is used for filling methane gas or multiple gases (CH ₄ /CO ₂ , CH ₄ / N ₂ ).

In the above volumetric shale isothermal adsorption experimental device, preferably, the volumetric shale isothermal adsorption experimental device further includes a gas booster unit, and the gas booster unit includes a booster container and a booster pump;

The first gas cylinder and the second gas cylinder are respectively communicated with the pressurized container, the pressurized container is communicated with the standard chamber, and the booster pump is communicated with the pressurized container;

The heat preservation mechanism is sleeved on the outside of the standard chamber, the pressurized container and the adsorption kettle;

The data measurement and acquisition unit further includes a second pressure sensor, the pressurized container is provided with the second pressure sensor, and the data communication acquisition card is electrically connected to the second pressure sensor.

In the above volumetric shale isothermal adsorption experimental device, preferably, the heat preservation mechanism is a constant temperature water bath circulation unit or a constant temperature oven air bath unit.

The volume ratio of the standard chamber to the adsorption kettle is about 1:3.

In the above-mentioned volumetric shale isothermal adsorption experimental device, the volume of the standard chamber is about 100 mL, and the volume of the adsorption kettle before placing a sample is about 300 mL. Increasing the volume of the adsorption tank to load more shale samples can reduce the experimental error and reduce the dilution effect of the free space gas on the isotope fractionation effect. Both the standard chamber and the adsorption kettle are made of 316L stainless steel, which can resist _CO2 corrosion. The standard chamber allows a maximum working pressure of 50MPa, and the adsorption kettle allows a maximum working pressure of 32MPa.

In the volumetric shale isothermal adsorption experimental device described above, the vacuum pump can extract the internal pressure of the experimental device to 0.01 MPa, so as to realize vacuuming of the experimental device and the entire pipeline.

In the above-mentioned volumetric shale isothermal adsorption experimental device, the temperature and pressure data of the system are automatically and continuously collected through the data communication acquisition card, and are transmitted to the computer software for data analysis and processing through an electrical connection. The software system can accurately and continuously Record the data and generate a curve to judge the adsorption equilibrium.

In the above-mentioned volumetric shale isothermal adsorption experimental device, preferably,

The constant temperature water bath circulation unit includes a constant temperature control water bath device, a circulating insulation hose pipeline, a first insulation hose and a second insulation hose;

The first insulation hose is sleeved on the outer wall of the standard chamber, the second insulation hose is sleeved on the outer wall of the adsorption kettle, the first insulation hose, the second insulation hose and The constant temperature control water bath device is connected through the pipeline of the circulating heat preservation hose to form a closed loop.

In the above-mentioned volumetric shale isothermal adsorption experimental device, preferably,

The constant temperature water bath circulation unit also includes a third thermal insulation belt;

The third thermal insulation hose is sleeved on the outer wall of the pressurized container, and the first thermal insulation hose, the second thermal insulation hose, the third thermal insulation hose and the constant temperature control water bath device pass through the The above-mentioned circulating heat preservation water belt pipelines are connected to form a closed loop.

In the volumetric shale isothermal adsorption experiment device described above, the constant temperature oven air bath unit is a precisely controlled constant temperature oven. The standard chamber, the adsorption kettle, the pipelines and control valves connecting the standard chamber and the adsorption kettle are placed in the precisely temperature-controlled constant temperature oven for heat preservation.

In the above volumetric shale isothermal adsorption experimental device, the volume of the pressurized container is 1L, the working pressure is 50MPa, the pressurized medium is water, and the material of the pump barrel is 316L stainless steel. The pressurized container is used for insufficient pressure in the device. The booster pump is boosted to provide pressure for the device to meet the experimental requirements.

In the volumetric shale isothermal adsorption experimental device described above, the circulating fluid in the constant temperature water bath circulation unit is made of water and ethylene glycol at a ratio of 7:1, and the temperature can be controlled accurately to 0.1°C.

In the volumetric shale isothermal adsorption experiment device described above, preferably, the outlet end of the first gas cylinder is provided with a first decompression valve, and the outlet end of the second gas cylinder is provided with a second decompression valve.

In the above-mentioned volumetric shale isothermal adsorption experimental device, preferably, an inlet valve is arranged on the pipeline between the gas injection unit and the standard chamber, and the pipeline between the gas inlet valve and the standard chamber The road is a pipeline with heating and insulation.

In the volumetric shale isothermal adsorption experimental device described above, preferably, the standard chamber and the adsorption kettle are respectively provided with a stirring mechanism at the bottom, and the stirring mechanism includes a stirring motor or a magnetic stirrer.

In the above-mentioned volumetric shale isothermal adsorption experimental device, the stirring mechanism can adjust the rotating speed and perform strong stirring to prevent stratification of multivariate gases.

In the above-mentioned volumetric shale isothermal adsorption experimental device, preferably, a first filter is arranged on the pipeline connected between the standard chamber and the adsorption kettle; a second filter and a back filter are arranged at the outlet end of the adsorption kettle. A pressure valve, the second filter communicates with the adsorption kettle, and the back pressure valve communicates with the second filter; the standard chamber is also provided with an exhaust valve.

In the volumetric shale isothermal adsorption experimental device mentioned above, the precise control of gas extraction can be realized through the adjustment of the back pressure valve.

In the volumetric shale isothermal adsorption experimental device described above, preferably, the adsorption kettle is provided with a safety overpressure protection valve, and the pressurized container is provided with a safety overpressure protection valve.

In the above volumetric shale isothermal adsorption experimental device, according to the actual situation, a control valve is arranged on the pipeline between the gas injection unit and the pressurized container; a control valve is arranged on the pipeline between the vacuum pump and the standard chamber. There is a control valve; an adsorption valve is set on the pipeline between the standard chamber and the adsorption kettle; a control valve is set on the pipeline of the circulating heat preservation water belt connected to the constant temperature control water bath device.

Beneficial effects of the utility model:

The utility model capacity method shale isothermal adsorption experimental device:

(1) It is possible to discuss the determination of the adsorption capacity of shale samples to CH ₄ /CO ₂ , _{CH 4} /N ₂ and other multi-component gases. Accurate control of gas intake can be achieved at each adsorption equilibrium pressure point;

(2) It can discuss the methane carbon isotope fractionation effect in the shale gas desorption process, and reduce the dilution effect of the free space gas in the adsorption system on the isotope fractionation effect.

Description of drawings

Fig. 1 is the structural representation of volumetric shale isothermal adsorption experiment device in embodiment 1;

Fig. 2 is a graph showing the adsorption and desorption curves of sample No. 1 for CH ₄ tested by the volumetric shale isothermal adsorption experimental device in Example 2.

Explanation of reference symbols:

1 standard chamber 2 adsorption kettle 3 first gas cylinder 4 second gas cylinder 5 vacuum pump 6 constant temperature control water bath device 7 booster container 8 booster pump 9 first temperature sensor 10 second temperature sensor 11 first pressure sensor 12 second pressure Sensor 13 third insulation hose 14 first insulation hose 15 second insulation hose 16 first pressure reducing valve 17 second pressure reducing valve 18 stirring motor 19 stirring motor 20 first filter 21 second filter 22 back pressure Valve 23 Intake valve 24 Safety overpressure protection valve 25 Safety overpressure protection valve 26 Exhaust valve 27 Control valve 28 Control valve 29 Adsorption valve 30 Control valve

detailed description

In order to have a clearer understanding of the technical features, purpose and beneficial effects of the present utility model, the technical solution of the present utility model is described in detail below, but it cannot be understood as limiting the scope of implementation of the utility model.

Example 1

This embodiment provides a volumetric shale isothermal adsorption experimental device, as shown in Figure 1,

The volumetric shale isothermal adsorption experiment device includes an adsorption and desorption unit, a gas injection unit, a constant temperature control unit, a vacuum unit, and a data measurement and acquisition unit.

The adsorption-desorption unit includes a standard chamber 1 and an adsorption kettle 2. The standard chamber 1 is connected to the adsorption kettle 2; the volume of the adsorption kettle 2 is about 300 mL when no sample is placed, and the volume of the standard chamber 1 is about 100 mL. Stirring motors 18 and 19 are respectively provided at the bottom of the standard chamber 1 and the adsorption kettle 2 . The stirring motor can adjust the speed and stir strongly to prevent the multi-element gas from stratifying. A control valve 29 and a first filter 20 are provided on the pipeline connecting the standard chamber 1 and the adsorption tank 2 . The standard chamber 1 is provided with an exhaust valve 26 . The outlet of the adsorption kettle 2 is provided with a second filter 21 and a back pressure valve 22. The back pressure valve 22 and the second filter 21 are connected to the adsorption kettle 2 in sequence. Through the adjustment of the back pressure valve, the accuracy of gas extraction can be realized. Control; standard chamber 1 is also provided with an exhaust valve 26 .

The volume of the standard chamber is about 100mL, and the volume of the adsorption kettle before placing the sample is about 300mL. Increasing the volume of the adsorption tank to load more shale samples can reduce the experimental error and reduce the dilution effect of the free space gas on the isotope fractionation effect. Both the standard chamber and the adsorption kettle are made of 316L stainless steel, which is resistant to _CO2 corrosion. The maximum allowable working pressure of the standard chamber is 50MPa, and the maximum allowable working pressure of the adsorption kettle is 32MPa.

The gas injection unit comprises a first gas cylinder 3 and a second gas cylinder 4, the first gas cylinder 3 and the second gas cylinder 4 communicate with the standard chamber 1 respectively; the first gas cylinder 3 is used to fill helium, and the second gas cylinder 4 Bottle 4 is used to charge methane gas or multiple gases (CH ₄ /CO ₂ , CH ₄ /N ₂ ).

The volumetric shale isothermal adsorption experimental device of this embodiment also includes a gas booster unit, which includes a booster container 7 and a booster pump 8; the first gas cylinder 3 and the second gas cylinder 4 are connected to the booster container 7 The pipeline between the gas pressurization unit and the pressurized container 7 is provided with a control valve 27, and the pipeline between the gas pressurization unit and the standard chamber 1 is provided with an intake valve 23, and the intake valve 23 is connected to the standard chamber The pipeline between 1 is a pipeline with heating insulation. The booster container 7 communicates with the standard chamber 1 , and the booster pump 8 communicates with the booster container 7 . The outlet end of the first gas cylinder 3 is provided with a first decompression valve 16 , and the outlet end of the second gas cylinder 4 is provided with a second decompression valve 17 .

The volume of the booster container is 1L, the working pressure is 50MPa, the booster medium is water, and the material of the pump barrel is 316L stainless steel. Require.

The heat preservation mechanism is a constant temperature water bath circulation unit, and the constant temperature water bath circulation unit includes a constant temperature control water bath device 6, a circulation heat preservation hose pipeline, a first heat preservation water belt 14, a second heat preservation water belt 15, and a third heat preservation water belt 13; 14 sets of water belts are set on the outer wall of the standard chamber 1, the second heat preservation water belt 15 is set on the outer wall of the adsorption kettle 2, the third heat preservation water belt 13 is set on the outer wall of the pressurized container 7, the first heat insulation water belt 14, The second heat preservation water belt 15, the third heat preservation water belt 13 and the constant temperature control water bath device 6 are connected through the circulation heat preservation water belt pipeline and form a closed loop. A control valve 30 is arranged on the pipeline of the circulating heat preservation water belt connected with the constant temperature control water bath device 6 .

The vacuum unit is a vacuum pump 5 which communicates with the standard chamber 1 and the adsorption kettle 2 respectively, and a control valve 28 is arranged on the pipeline between the vacuum pump 5 and the standard chamber 1 . The vacuum pump 5 can extract the internal pressure of the experimental device to 0.01 MPa, so as to realize the vacuum treatment of the experimental device and the entire pipeline.

The data measurement and acquisition unit includes a first temperature sensor 9, a second temperature sensor 10, a first pressure sensor 11, a second pressure sensor 12, a data communication acquisition card and a computer. The standard chamber 1 is provided with a first temperature sensor 9, an adsorption kettle 2 is provided with a second temperature sensor 10, the adsorption kettle 2 is provided with a first pressure sensor 11, and the pressurized container 7 is provided with a second pressure sensor 12, and the data communication acquisition card is connected with the first temperature sensor 9 and the second temperature sensor respectively 10. The first pressure sensor 11 and the second pressure sensor 12 are electrically connected, and the computer is electrically connected to the data communication acquisition card. The temperature and pressure data of the system are automatically and continuously collected through the data communication acquisition card, and transmitted to the computer software for data analysis and processing through the electrical connection. The software system can accurately and continuously record the data and generate curves to judge the adsorption balance.

The adsorption kettle 2 is provided with a safety overpressure protection valve 25 , and the booster vessel 7 is provided with a safety overpressure protection valve 24 .

The pressure range of the pressure reducing valve and the pressure sensor in the volumetric shale isothermal adsorption experiment device is 0-23MPa, and the temperature range of the temperature sensor is 30-90°C; the pressure measurement can be accurate to 0.001MPa, and the temperature control can be accurate to 0.1°C .

This embodiment also provides a method for the volumetric shale isothermal adsorption experiment, which uses the above-mentioned volumetric shale isothermal adsorption experiment device, and the specific operation steps are as follows:

(1) Preparation of experimental samples. First, the shale core samples are crushed and sieved to prepare shale particles with different particle sizes. Dry the sieved shale particles in an oven at 105°C for 24 hours to remove the moisture in the sample, weigh them and put them into the adsorption kettle;

(2) Instrument tightness testing. First close the exhaust valve 26, open the intake valve 23 and the adsorption valve 29, control the first decompression valve 16, and fill helium into the standard chamber 1 and the adsorption kettle 2, the filling pressure must be higher than the maximum pressure of the isothermal adsorption experiment , the system collects the pressure data in the standard chamber 1 and the adsorption kettle 2, and if the pressure remains unchanged within 6 hours, it is considered that the airtightness of the system is good;

(3) System free space volume calibration. Use helium to calibrate the precise volume of the standard chamber 1 and the adsorption kettle 2, and change the volume of the standard chamber 1 by placing a stainless steel standard block of known volume in the standard chamber 1, and consider that helium does not adsorb on the surface of the standard block, The free volumes of the standard chamber 1 and the adsorption kettle 2 can be obtained by replacing the standard blocks of different sizes twice. First, the vacuum pump 5 is used to evacuate the system, and after completion, fill the standard chamber 1 with a certain pressure of helium, record the pressure data after the pressure is stable, then open the adsorption valve 29, record the data after the pressure is stable, and apply the law of conservation of matter And the gas state equation can be calculated;

(4) Isothermal adsorption experiment. First use the vacuum pump 5 to evacuate the system for more than 4 hours and then conduct the adsorption experiment. Close the exhaust valve 26 and the adsorption valve 29, open the intake valve 23, control the second decompression valve 17, and fill the standard chamber 1 with methane gas or multiple gases (CH ₄ /CO ₂ , CH ₄ /N ₂ ) to Target pressure (calculated), record the pressure value after the data is stable. Then open the adsorption valve 29, make the standard chamber 1 communicate with the adsorption kettle 2, the adsorption starts, record the system pressure value after the adsorption balance, and calculate the gas adsorption amount in the system at this time. The back pressure valve 22 takes trace gas for chromatographic component analysis. According to the needs of the experiment, repeat the above steps to gradually increase the pressure until the target pressure required by the experiment is reached, and the adsorption experiment is completed. Ensure that the equilibrium time of each pressure point is more than 12h. The adsorption amount corresponding to the final experimental result is the cumulative adsorption amount.

Example 2

This embodiment provides the test experiment of the volumetric shale isothermal adsorption experimental device in Example 1. The shale sample is used for the experimental test using the volumetric shale isothermal adsorption experimental device in Example 1. The basic geological parameters of the sample are shown in Table 1. Among them, sample No. 1 is for the adsorption of CH ₄ , and sample No. 2 is for the competitive adsorption of CH ₄ /CO ₂ , and the experimental temperature is 30°C.

Table 1

serial number area era lithology depth TOC(%) Ro(%) 1 Sichuan Yibin Silurian Longmaxi Formation gray black mudstone 1386.83 0.56 1.93 2 Sichuan Yibin Silurian Longmaxi Formation black shale 2440.9 1.92 1.94

The adsorption and desorption results of sample No. ₁ to CH gas are shown in Table 2 and Figure 2, and Figure 2 is the adsorption and desorption curve:

Table 2

From the data in Table 2 and Figure 2, it can be seen that under low pressure, the adsorption capacity of shale samples increases significantly with the increase of pressure. The adsorption capacity remained basically unchanged with increasing pressure. 0-10MPa is the region of rapid increase in adsorption capacity, 10-20MPa is the region of gentle increase in adsorption capacity, and the adsorption capacity is gradually saturated after 20MPa. The adsorption isotherm of shale samples shows the property of type I adsorption isotherm. The desorption process is similar to the adsorption process. The methane desorption basically does not occur in the high-pressure section, and the desorption starts gradually after the pressure drops to 20MPa, and reaches the rapid desorption stage after 10MPa.

The adsorption data of CH ₄ /CO ₂ for No. 2 sample are shown in Table 3, and the ratio of CH ₄ and CO ₂ in the mixed gas used is about 1:1.

table 3

It can be seen from the data in Table 3 that during the adsorption process of _CH4 and _CO2 mixed gas, the components interact and compete for adsorption. _CO2 is a strong adsorbate, and its adsorption capacity is better than that of _CH4 gas.

In summary, the volumetric shale isothermal adsorption experimental device provided by the utility model can explore the determination of the adsorption capacity of shale samples to CH ₄ /CO ₂ , CH ₄ /N ₂ and other multi-component gases. It is physically resistant to _CO2 corrosion, and the gas in the kettle is uniform and non-stratified. At the same time, it can achieve precise control of gas extraction at each adsorption equilibrium pressure point; moreover, the experimental device can also analyze the methane carbon isotope fractionation effect during the shale gas desorption process. Discussion to reduce the dilution effect of the free space gas in the adsorption system on the isotope fractionation effect.

Claims (10)

1. a volumetric method shale adsorption isotherm experiment device, it is characterised in that: this volumetric method shale adsorption isotherm experiment device includes adsorption-desorption unit, gas injection unit, temperature control unit, vacuum unit and DATA REASONING and collecting unit；

Described adsorption-desorption unit includes standard chamber and absorption still, and described standard chamber is connected with described absorption still；

Described gas injection unit includes that the first gas cylinder and the second gas cylinder, described first gas cylinder and the second gas cylinder are connected with described standard chamber respectively；

Described temperature control unit is heat preservation mechanism, and described heat preservation mechanism is set in described standard chamber and the outside of described absorption still；

Described vacuum unit is vacuum pump, and described vacuum pump is respectively connected with leading to described standard chamber and described absorption still；

Described DATA REASONING and collecting unit include the first temperature sensor, the second temperature sensor, the first pressure transducer, data communication capture card and computer, described standard chamber is provided with described first temperature sensor, described absorption still is provided with described second temperature sensor, described absorption still is provided with described first pressure transducer, described data communication capture card is electrically connected with described first temperature sensor, the second temperature sensor and the first pressure transducer, and described computer is electrically connected with described data communication capture card.

Volumetric method shale adsorption isotherm experiment device the most according to claim 1, it is characterised in that: this volumetric method shale adsorption isotherm experiment device also includes that gas boosting unit, described gas boosting unit include pressurized container and booster pump；

Described first gas cylinder and the second gas cylinder are connected with described pressurized container respectively, and described pressurized container is connected with described standard chamber, and described booster pump is connected with described pressurized container；

Described heat preservation mechanism is set in described standard chamber, described pressurized container and the outside of described absorption still；

Described DATA REASONING and collecting unit also include that the second pressure transducer, described pressurized container are provided with described second pressure transducer, and described data communication capture card is electrically connected with described second pressure transducer.

Volumetric method shale adsorption isotherm experiment device the most according to claim 2, it is characterised in that: described heat preservation mechanism is water bath with thermostatic control cycling element or constant temperature oven air bath unit；

Described standard chamber is 1:3 with the volume ratio of described absorption still.

Volumetric method shale adsorption isotherm experiment device the most according to claim 3, it is characterised in that: described water bath with thermostatic control cycling element includes thermostatic control water bath device, circulation insulation water band pipeline, the first insulation water band and the second insulation water band；

Described first insulation water band is set in the outer wall of described standard chamber, described second insulation water band is set in the outer wall of described absorption still, and described first insulation water band, described second insulation water band and described thermostatic control water bath device are connected by described circulation insulation water band pipeline and are formed closed circuit.

Volumetric method shale adsorption isotherm experiment device the most according to claim 4, it is characterised in that: described water bath with thermostatic control cycling element also includes the 3rd insulation water band；

Described 3rd insulation water band is set in the outer wall of described pressurized container, and described first insulation water band, described second insulation water band, described 3rd insulation water band and described thermostatic control water bath device are connected by described circulation insulation water band pipeline and are formed closed circuit.

Volumetric method shale adsorption isotherm experiment device the most according to claim 1, it is characterised in that: described first cylinder outlet end is provided with the first air relief valve, and described second cylinder outlet end is provided with the second air relief valve.

Volumetric method shale adsorption isotherm experiment device the most according to claim 1, it is characterized in that: be provided with intake valve on the pipeline between described gas injection unit and described standard chamber, the pipeline between described intake valve and described standard chamber is the pipeline of band heating and thermal insulation.

Volumetric method shale adsorption isotherm experiment device the most according to claim 1, it is characterised in that: described standard chamber and described absorption still are provided with rabbling mechanism respectively in bottom, and described rabbling mechanism includes stirring motor or magnetic stirring apparatus.

Volumetric method shale adsorption isotherm experiment device the most according to claim 1, it is characterised in that: it is provided with the first filter on the pipeline that described standard chamber is connected with described absorption still；The described absorption still port of export is provided with the second filter and counterbalance valve, and described second filter is connected with described absorption still, and described counterbalance valve is connected with described second filter；Described standard chamber is additionally provided with air bleeding valve.

Volumetric method shale adsorption isotherm experiment device the most according to claim 2, it is characterised in that: described absorption still is provided with safe overpressure protection valve, and described pressurized container is provided with safe overpressure protection valve.