CN105675434A - System and method for measuring gas content - Google Patents
System and method for measuring gas content Download PDFInfo
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- CN105675434A CN105675434A CN201610151600.7A CN201610151600A CN105675434A CN 105675434 A CN105675434 A CN 105675434A CN 201610151600 A CN201610151600 A CN 201610151600A CN 105675434 A CN105675434 A CN 105675434A
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- G01N7/00—Analysing materials by measuring the pressure or volume of a gas or vapour
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- G01N7/00—Analysing materials by measuring the pressure or volume of a gas or vapour
- G01N7/14—Analysing materials by measuring the pressure or volume of a gas or vapour by allowing the material to emit a gas or vapour, e.g. water vapour, and measuring a pressure or volume difference
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Abstract
The invention discloses a system for measuring the gas content. The system comprises a seal tank, a temperature control box, a pressurizing device and a gas collecting device. The seal tank comprises a transport tank for containing samples and a pressure bearing tank for containing the transport tank. The transport tank can be stressed and broken in the pressure bearing tank. The pressure bearing tank is provided with a gas injection hole and a gas exhaust hole. The temperature control box is used for heating the pressure bearing tank. The pressurizing device is used for inputting methane gas to the pressure bearing tank from the gas injection hole for pressurizing. The gas collecting device is used for collecting gas exhausted from the gas exhaust hole of the pressure bearing tank. The invention further discloses a method for measuring the gas content. The method is used for measuring the content of lost gas and the content of desorbed gas of the samples based on the temperature and pressure backtracking thought. The system for measuring the gas content is simple in operation and accurate in metering and brings convenience to gas collecting, and the method for measuring the gas content is reliable in result and can provide an important reference for natural gas target layer evaluation, reserve estimation and beneficial region optimization.
Description
Technical field
The present invention relates to shale gas stock assessment field of measuring technique, particularly relate to a kind of air content measuring system and measuring method.
Background technology
Shale air content is the main evaluation parameter of natural gas exploration and exploitation, and shale gassiness evaluation, resource reserve prediction are had great importance. And accurately obtaining loss tolerance is the key determining shale air content reliability. Desorption method is to measure shale air content most straightforward approach, is therefore used as the basic skills of shale gas content measurement. In desorption method, shale air content is made up of gas desorption quantity, loss Gas content and residual volume 3 part. Wherein, loss Gas content is the part that in desorption method, error is bigger, and it refers to that drill bit bores chance rock stratum and solves, from well head taking-up loading, the gas volume discharged before cucurbitula to rock core.
At present, but without instrument, loss tolerance is measured accurately. Loss tolerance obtains typically via pushing back calculating method, mainly includes return law of the straight line, polynomial regression and non-linear regression method. The explanation of loss tolerance is based on the approximate solution of complete diffusion equation SMS message by return law of the straight line, and diffusion rate is linear to time square root relevant; Polynomial regression is more higher than the identical property of return law of the straight line; Although nonlinear regression result is between rectilinear regression and the result of polynomial regression, and correlation coefficient is higher, but does not accurately provide diffusion rate situation over time. Return law of the straight line, polynomial regression and non-linear regression method estimation result can only substantially meet the requirement of exploration phase at initial stage. But, in actual application, above-mentioned computational methods have following defects that
1, return law of the straight line theory hypothesis is that in nature desorption process, diffusion rate is constant, and in actual desorbing, the diffusion rate of shale is time dependent function. So can cause when the coring time long, when losing large-minded, the loss tolerance of return law of the straight line estimation is narrow-minded more than actual loss, and error is bigger. The loss tolerance that polynomial regression estimates is generally high than actual loss tolerance. Non-linear regression method does not accurately provide diffusion rate situation over time. And then affect the accuracy of result.
2, above-mentioned loss tolerance is all obtained by Return Law estimation, and its result of calculation differs bigger with actual value.
3, above-mentioned loss tolerance is calculated value, it is impossible to analyze the pressure and temperature impact on loss tolerance.
As can be seen here, above-mentioned existing air content acquisition methods still suffers from bigger defect, and urgently improves further. How to found new air content measuring system and the method for a kind of simple to operate, accurate measurement, reliable results, for the measurement of gassiness sample loss gas and stripping gas, real belong to one of currently important research topic in this area.
Summary of the invention
It is an object of the invention to provide a kind of air content measuring system, make its simple to operate, accurate measurement, reliable results, especially can the loss tolerance of reliable measurements gassiness sample, reduce loss tolerance measured deviation, thus overcoming the existing measurement assessment result to loss tolerance often to have deviation, it is impossible to accurately reflect the deficiency of the true air content of sample.
Another purpose of the present invention is to provide a kind of air content measuring method, and for the gassiness samples such as shale carry out the measurement of loss tolerance and gas desorption quantity, measurement result is accurately, reliably.
For achieving the above object, the present invention adopts the following technical scheme that
A kind of air content measuring system, including hermetically sealed can, temperature control box, pressue device and gas collecting apparatus, wherein: described hermetically sealed can includes the transfer cask for holding sample and for holding the pressure-bearing tank of described transfer cask, described transfer cask stress can crush in pressure-bearing tank, and described pressure-bearing tank is provided with injecting hole and steam vent; Described temperature control box, is used for heating described pressure-bearing tank; Described pressue device, pressurizes for inputting methane gas from injecting hole to described pressure-bearing tank; Described gas collecting apparatus, for collecting from described pressure-bearing tank steam vent expellant gas.
As improving further, the inner surface of described pressure-bearing tank is provided with screw thread and/or tapered protrusion for assisting broken described transfer cask.
Described pressue device includes methane gas steel cylinder, booster pump, gas flowmeter and vacuum pump, described booster pump connects methane gas steel cylinder and to described pressure-bearing tank gas injection, described gas flowmeter is for measuring the methane gas scale of construction injected to described pressure-bearing tank, and described vacuum pump was used for described pressure-bearing tank evacuation before described booster pump works.
Described pressure-bearing tank is additionally provided with Pressure gauge installing hole.
Described gas collecting apparatus includes gas collection measuring cylinder and pressure balance actuator, described pressure balance actuator includes being arranged on the supporter bottom described gas collection measuring cylinder, described supporter has gas collection mouth and osculum, described osculum is connected with pressure balance adjusting handle, on pressure balance adjusting handle, along the circumferential direction distribution has the metering hole that diameter does not wait, below described pressure balance adjusting handle, the position of corresponding described osculum anti-down suction pipe is installed.
Described gas collection measuring cylinder carries out gas collection by fluid-discharge therapy, is provided with liquid level information gathering element in described gas collection measuring cylinder.
The steam vent place of described pressure-bearing tank arranges and quickly connects check valve male joint, and the gas collection mouth place of described gas collecting apparatus is provided with the female joint matched.
Also include data acquisition and procession device, the gas flow that described data acquisition and procession device is collected for the gas flow and described gas collecting apparatus obtaining the output of described pressue device, and calculate loss Gas content and the stripping gas content of sample.
A kind of air content measuring method, carries out sample experiments by following steps:
A. testing sample is loaded transfer cask, seals and preserve, then transfer cask loaded in a pressure-bearing tank and implement secondary seal; B. described pressure-bearing tank evacuation is processed, and pressure-bearing tank is heated to demand temperature T, to pressure-bearing tank filling methane gas to demand pressure P1;Certain external force is provided to make the transfer cask in described pressure-bearing tank break, after a period of time, pressure stability drop to P in pressure-bearing tank2, now again in pressure-bearing tank, it is filled with methane gas and makes pressure return to P1If pressure declines, and repeats to be filled with methane gas, until pressure stability is at P1, recording the methane gas total amount being filled with in pressure-bearing tank in this step is N1; C. connecting gas collecting apparatus on pressure-bearing tank, total gas output that record precipitates out from pressure-bearing tank when pressure returns to ambient pressure in pressure-bearing tank is M1; D. with above-mentioned methane gas total amount N1, total gas output M1Respectively as loss gas and the gas desorption quantity of sample, calculate loss Gas content and the stripping gas content of sample.
As improving further, also include following contrast experiment: take the calibrated bolck with testing sample formed objects and be directly placed in pressure-bearing tank, pressure-bearing tank evacuation is processed, and to the heating of pressure-bearing tank to same temperature T, to pressure-bearing tank filling methane gas to same pressure P1, it is N that record is filled with the methane gas scale of construction of pressure-bearing tank0; Connecting gas collecting apparatus on pressure-bearing tank, record gas output of pressure-bearing tank when pressure returns to ambient pressure in pressure-bearing tank is M0; With the methane gas total amount N of sample experiments in described step D1Methane gas scale of construction N with contrast experiment0Difference as the loss tolerance of sample, with total gas output M of sample experiments1Gas output M with contrast experiment0Difference as the gas desorption quantity of sample, calculate loss Gas content and the stripping gas content of sample.
Owing to adopting technique scheme, the present invention at least has the advantage that
(1) air content measuring system of the present invention, compact conformation, air-tightness are good, homogeneous heating, pressure stability, gas collection convenience, accurate measurement, simple to operate, can be used for the loss gas of gassiness sample and stripping gas is measured, simultaneously can be used for various gasmetries and the collections such as natural gas.
(2) thought that the measurement system and method for the present invention is recalled based on temperature and pressure, by making gassiness sample in pressure-bearing tank return under formation condition containing gaseity natural desorbing under ground layer original Temperature-pressure Conditions, so can accurately measure loss tolerance and gas desorption quantity, and can according to the methane gas component analysis temperature and pressure of the sample absorption impact on loss tolerance under different temperature, pressure, air content is measured more accurate, and is more suitable for practicality.
(3) air content measuring system of the present invention and method, it is possible not only to measure loss tolerance in natural gas exploration and development, simultaneously can also natural gas desorption process in mock standard rock, obtain gas desorption quantity, air content structural analysis and temperature and pressure backtracking method is utilized to calculate air content etc., thus providing important evaluating for natural gas exploration and exploitation, preferably provide important evidence for natural gas target zone evaluation, reserve estimate and Favorable Areas.
Accompanying drawing explanation
Above-mentioned is only the general introduction of technical solution of the present invention, in order to better understand the technological means of the present invention, below in conjunction with accompanying drawing, the present invention is described in further detail with detailed description of the invention.
Figure 1A, 1B are transfer cask and the structural representation of pressure-bearing tank respectively.
Fig. 2 A is the structural representation of the pressure-bearing tank under use state.
Fig. 2 B is the structural representation of gas collecting apparatus.
Fig. 3 is the structural representation under air content measuring system use state of the present invention.
Detailed description of the invention
The present invention provides a kind of air content measuring system, mainly include hermetically sealed can, temperature control box, pressue device and gas collecting apparatus, wherein: described hermetically sealed can includes the transfer cask for holding sample and for holding the pressure-bearing tank of described transfer cask, described transfer cask stress can crush in pressure-bearing tank, and described pressure-bearing tank is provided with injecting hole and steam vent; Described temperature control box, is used for heating described pressure-bearing tank; Described pressue device, pressurizes for inputting methane gas from injecting hole to described pressure-bearing tank; Described gas collecting apparatus, for collecting from described pressure-bearing tank steam vent expellant gas. Further, it is also possible to data acquisition and procession device is set, the gas flow that the gas flow and described gas collecting apparatus for obtaining the output of described pressue device is collected, and calculate loss Gas content and the stripping gas content of sample.
Referring to shown in Figure 1A, 1B, described hermetically sealed can includes transfer cask 1 and 2 two kinds of pressure-bearing tank.Wherein, transfer cask 1 is by sealing lid 11 and tank body 12 forms, and transfer cask 1 is sealed up for safekeeping airtight for gassiness sample, it is simple to carry transport, and transfer cask 1 adopts frangible but has the material of certain anti-pressure ability, rupturable under external force collision. The top cover 23 that pressure-bearing tank 2 is fixed, by tank body 21, the bottom 22 being connected with tank body 21 one end and the tank body other end removably connects forms, in the middle part of top cover 23 and be inclined-plane between top cover 23 outer rim, it is simple to be collected when gas is very little. Snapping between tank body 21 and top cover 23, can improve operating efficiency, it is to avoid gas escape. Tank body 12 diameter of transfer cask 1 is slightly less than the tank body 21 of pressure-bearing tank 2, so makes transfer cask 1 can put into pressure-bearing tank 2, can get rid of again air as much as possible simultaneously. The inner surface of tank body 21 is preferably provided to matsurface, can be used for assisting broken described transfer cask 1. As the concrete example of one, as shown in Figure 1B, tank body 21 sidewall of pressure-bearing tank 2 is provided with screw thread, and bottom 22 is provided with the bullet internal prominent to tank body 21.
Refer to shown in Fig. 2 A, the top cover 23 of described pressure-bearing tank 2 has three through holes, one of them is injecting hole 24, injecting hole 24 place can connect air relief valve, second is steam vent 25, last Bonding pressure table 26, wherein, steam vent 25 is located in the middle part of described top cover 23, and row steam vent 25 both sides are divided in two other hole.
Referring to shown in Fig. 2 B, described gas collecting apparatus 3 includes gas collection measuring cylinder 31, pressure balance actuator 32 and protection and holds in the palm cover 37, and gas collection measuring cylinder 31 can identify graduation mark, and protection holder cover 37, except protective effect, also has the effect supported with stable set device of air 3. Described pressure balance actuator 32 includes supporter 35, pressure balance adjusting handle 33, anti-down suction pipe 36. Supporter 35 is connected to bottom gas collection measuring cylinder 31 by tightening screw, supporter 35 is provided with osculum, for pressure balance adjusting handle 33 below described osculum, pressure balance adjusting handle 33 is along the circumferential direction sequentially distributed the metering hole that diameter does not wait from small to large, for instance can arrange the metering hole of 6 diameters respectively 1mm, 1.5mm, 2mm, 2.5mm, 3mm, 3.5mm. Anti-down suction pipe 36 is arranged on below pressure balance adjusting handle 33, and anti-down suction pipe 36 mouth of pipe is suitable with the position of a through hole on pressure balance adjusting handle 33, and on supporter 35, the diameter of osculum is suitable with the maximum limit the diameter of flowing hole of pressure balance adjusting handle 33. When osculum on supporter 35, anti-down suction pipe 36 mouth of pipe, pressure balance adjusting handle 33 through hole overlap time, namely osculum is opened, and gas collection measuring cylinder 31 is internal to be in communication with the outside.
Being additionally provided with gas collection mouth 34 on gas collecting apparatus 3, gas collection mouth 34 is the perforate at supporter 35 heart position wherein as shown in Figure 2 B. Described gas collection mouth 34 connects for corresponding with the steam vent 25 on pressure-bearing tank 2. In order to realize quick connection, the pin thread quickly connecting check valve and box can be adopted between the two to be connected. Specifically, the pin thread quickly connecting check valve can be installed at steam vent 25 place, the box of coupling is installed, thus the duct free formula realized between pressure-bearing tank 2 and gas collecting apparatus 3 is directly connected at gas collection mouth 34 place.
Being additionally provided with the sensing element that can gather liquid level information in described gas collection measuring cylinder 31, described liquid level information gathering element uses when gas collecting apparatus 3 adopts drainage gas collection.
Temperature control box 4 offers heating chamber 41, the internal diameter of described heating chamber 41 is suitable with the external diameter of described pressure-bearing tank 2, heating chamber 41 is in top board 43 upper shed of described temperature control box 4, form a through hole suitable with pressure-bearing tank 2 external diameter, the fixing heating element heater of through hole surrounding and heat-insulation layer, it is additionally provided with the temperature controller 42 of monitoring box body temperature, described heating element heater and temperature controller 42 in temperature control box 4 to be all connected with the power interface 44 being arranged on casing.
Pressue device 5 mainly includes booster pump 51, steel cylinder 52, gas flowmeter and vacuum pump. During use, steel cylinder 52 provides gas-pressurized, and steel cylinder 52 is connected with booster pump 51 by pipeline, and booster pump 51 is connected with the injecting hole 24 on pressure-bearing tank 2 by pipeline, gas flowmeter may be provided on the pipeline of injecting hole 24, for measuring the methane gas scale of construction injected in described pressure-bearing tank 2; Vacuum pump was used for described pressure-bearing tank 2 evacuation before described booster pump 51 works, can be connected by pipeline with the steam vent 25 on pressure-bearing tank 2 during use.
Described data Collection & Processing System can adopt host computer to realize, host computer connects and gathers the liquid level information gathering element of described gas collecting apparatus 3 and the data of the gas flowmeter record of pressue device 4, and further these collection data are processed, it is thus achieved that final air content measurement result.
After adopting design above, the air content measuring system compact conformation of the present invention, air-tightness are good, homogeneous heating, pressure stability, gas collection convenience, accurate measurement, simple to operate, can be used for the loss gas of gassiness sample and stripping gas content measurement, simultaneously can be used for various gasmetries and the collections such as natural gas, thus more suitable for practicality.
Present invention also offers a kind of air content measuring method, for the gassiness samples such as shale being carried out the measurement of loss tolerance and gas desorption quantity accurately. As a kind of embodiment, below in conjunction with above-mentioned measurement system, the described measuring method of the present invention is done concrete introduction:
Before experiment, it is possible to advance with the booster pump 51 air-tightness to transfer cask 1, pressure-bearing tank 2 and test. Such as, in transfer cask 1 and pressure-bearing tank 2, it is filled with a certain amount of gas, seals, be then placed in water, it does not have bubble occurs transfer cask 1 and pressure-bearing tank 2 good airproof performance are described, opens stand-by after taking-up.
During to gassiness sample experiments to be measured, mainly include following measuring process:
(1) transfer cask 1, pressure-bearing tank 2 and gas collecting apparatus 3 are taken out.
(2) open transfer cask 1 top cover 11, quickly load gassiness sample, seal and preserve. Space in transfer cask 1 is all occupied by the gassiness sample chosen as far as possible, so can at utmost reduce the impact that air content is measured by air.
(3) open pressure-bearing tank 2 top cover 23, transfer cask 1 loaded in pressure-bearing tank 2 and implement secondary seal, in order to assist the later stage to crush transfer cask 1, now can also put into grinding-material in the lump.
(4) pressure-bearing tank 2 evacuation is processed, then pressure-bearing tank 2 top cover 23 is vertically put in heating chamber upward. Switch on power, utilize heating element heater 41 and temperature controller 42 to heat pressure-bearing tank 2 to needs temperature T, utilize booster pump 51 to be filled with methane gas in pressure-bearing tank 2 to demand pressure P1. Now, temperature control box 4 and pressue device 5 are that in pressure-bearing tank 2, gassiness sample provides the stratum original temperature, the pressure environment that meet desorption experiment and require. Thering is provided certain external force to pressure-bearing tank 2, make transfer cask 1 break, pressure stability in pressure-bearing tank 2 after a period of time, now pressure drops to P2; Again in pressure-bearing tank 2, it is filled with methane gas, makes pressure return to P1, wait after pressure stabilisation, repeat the above steps, until pressure stability is at P1, it is N by this step overall process of gas flowmeter record is filled with the total amount of methane gas1, this value represents the absorbtivity of sample, it is believed that equal to loss tolerance.
(5) gas collection measuring cylinder 31 will be filled saturated aqueous common salt, then inversion connects with pressure-bearing tank 2, and open the osculum of pressure balance actuator 32, make pressure in pressure-bearing tank 2 return to P0(1 atmospheric pressure), liquid level position in liquid level acquisition elements time recording gas collection measuring cylinder 31, and to obtain final total gas output be M1, this value represents sample gas output, it is believed that equal to gas desorption quantity.
(6) data acquisition and procession module receives and stores the data of gas flowmeter record, and time and gas output data that liquid level acquisition elements obtains, and these data are processed further, draw loss Gas content and stripping gas content, further, also last solution inspiration capacity can be compared with contrast experiment with time relationship, standard desorption curve can be obtained.
(7) experiment terminates, the osculum of closing presure balance regulator 32, and disconnects the connection of gas collecting apparatus and pressure-bearing tank 2. Owing to gas collection measuring cylinder 31 air-tightness is good, it is possible to gas sample be saved in gas collection measuring cylinder 31, as the gas in graduated cylinder need to be gathered, by gas collection mouth 34 upward, the pin thread connection matched and sampling are used.
Further, for making measurement result more accurate, it is possible to obtain absolute loss tolerance and gas desorption quantity, it is possible to set up following contrast experiment on the basis of above-mentioned measurement process:
Take calibrated bolck (the such as iron block with laboratory sample formed objects, not adsorbed methane), put in pressure-bearing tank 2, after sealing, evacuation processes, then utilize heating element heater 41 and temperature controller 42 by pressure-bearing tank 2 temperature-pressure to same temperature T, utilize booster pump to add methane gas in pressure-bearing tank 2 to same pressure P1, utilize gas flowmeter record to be filled with methane gas scale of construction N0. Gas collection measuring cylinder 31 will fill saturated aqueous common salt, be then inverted and connect with pressure-bearing tank 2, open the osculum of pressure balance actuator 32, make pressure in pressure-bearing tank 2 return to P0(1 atmospheric pressure), liquid level position in liquid level acquisition elements time recording gas collection measuring cylinder 31, and obtain final total gas output and be designated as M0。
After adding above-mentioned contrast experiment, the methane gas scale of construction (N that described loss tolerance utilizes contrast experiment to record0) and testing sample experiment time record the methane gas scale of construction (N1) calculate, now, lose tolerance N2=N1–N0. Described gas desorption quantity utilizes the gas output (M that contrast experiment records0) and testing sample experiment time record final gas output (M1) calculate, now, gas desorption quantity M2=M1–M0。
In sum, the present invention utilizes and to prime stratum state, sample regression is returned former thinking, in experimentation, pressure-bearing tank 2 is carried out temperature-pressure, pressurizes gases used for methane, thus sample in pressure-bearing tank 2 is returned to prime stratum state, then pass through decompression desorbing and obtain stripping gas content. So the loss Gas content of gaseous sample, stripping gas content can be measured in the lump, and can according to the methane gas component analysis temperature and pressure of the sample absorption impact on loss tolerance under different temperature, pressure, air content is measured more accurate, and is more suitable for practicality.
Owing to adopting above technical scheme, the air content measuring system of the present invention and method, it is possible not only to measure loss tolerance in natural gas exploration and development, simultaneously can also natural gas desorption process in mock standard rock, obtain gas desorption quantity, calculating air content etc. by air content structural analysis and temperature and pressure backtracking method, thus providing important evaluating for natural gas exploration and exploitation, preferably providing important evidence for natural gas target zone evaluation, reserve estimate and Favorable Areas.
The above; it it is only presently preferred embodiments of the present invention; not the present invention being done any pro forma restriction, those skilled in the art utilize the technology contents of the disclosure above to make a little simple modification, equivalent variations or modification, all fall within protection scope of the present invention.
Claims (10)
1. an air content measuring system, it is characterised in that include hermetically sealed can, temperature control box, pressue device and gas collecting apparatus, wherein:
Described hermetically sealed can includes the transfer cask for holding sample and for holding the pressure-bearing tank of described transfer cask, and described transfer cask stress can crush in pressure-bearing tank, and described pressure-bearing tank is provided with injecting hole and steam vent;
Described temperature control box, is used for heating described pressure-bearing tank;
Described pressue device, pressurizes for inputting methane gas from injecting hole to described pressure-bearing tank;
Described gas collecting apparatus, for collecting from described pressure-bearing tank steam vent expellant gas.
2. a kind of air content measuring system according to claim 1, it is characterised in that the inner surface of described pressure-bearing tank is provided with screw thread and/or tapered protrusion for assisting broken described transfer cask.
3. a kind of air content measuring system according to claim 1, it is characterized in that, described pressue device includes methane gas steel cylinder, booster pump, gas flowmeter and vacuum pump, described booster pump connects methane gas steel cylinder and to described pressure-bearing tank gas injection, described gas flowmeter is for measuring the methane gas scale of construction injected to described pressure-bearing tank, and described vacuum pump was used for described pressure-bearing tank evacuation before described booster pump works.
4. a kind of air content measuring system according to claim 1, it is characterised in that be additionally provided with Pressure gauge installing hole on described pressure-bearing tank.
5. a kind of air content measuring system according to claim 1, it is characterized in that, described gas collecting apparatus includes gas collection measuring cylinder and pressure balance actuator, described pressure balance actuator includes being arranged on the supporter bottom described gas collection measuring cylinder, described supporter has gas collection mouth and osculum, described osculum is connected with pressure balance adjusting handle, on pressure balance adjusting handle, along the circumferential direction distribution has the metering hole that diameter does not wait, below described pressure balance adjusting handle, the position of corresponding described osculum anti-down suction pipe is installed.
6. a kind of air content measuring system according to claim 5, it is characterised in that described gas collection measuring cylinder carries out gas collection by fluid-discharge therapy, is provided with liquid level information gathering element in described gas collection measuring cylinder.
7. a kind of air content measuring system according to claim 5, it is characterised in that the steam vent place of described pressure-bearing tank arranges and quickly connects check valve male joint, and the gas collection mouth place of described gas collecting apparatus is provided with the female joint matched.
8. a kind of air content measuring system according to any one of claim 1-7, it is characterized in that, also include data acquisition and procession device, the gas flow that described data acquisition and procession device is collected for the gas flow and described gas collecting apparatus obtaining the output of described pressue device, and calculate loss Gas content and the stripping gas content of sample.
9. an air content measuring method, it is characterised in that carry out sample experiments by following steps:
A. testing sample is loaded transfer cask, seals and preserve, then transfer cask loaded in a pressure-bearing tank and implement secondary seal;
B. described pressure-bearing tank evacuation is processed, and pressure-bearing tank is heated to demand temperature T, to pressure-bearing tank filling methane gas to demand pressure P1; Certain external force is provided to make the transfer cask in described pressure-bearing tank break, after a period of time, pressure stability drop to P in pressure-bearing tank2, now again in pressure-bearing tank, it is filled with methane gas and makes pressure return to P1If pressure declines, and repeats to be filled with methane gas, until pressure stability is at P1, recording the methane gas total amount being filled with in pressure-bearing tank in this step is N1;
C. connecting gas collecting apparatus on pressure-bearing tank, total gas output that record precipitates out from pressure-bearing tank when pressure returns to ambient pressure in pressure-bearing tank is M1;
D. with above-mentioned methane gas total amount N1, total gas output M1Respectively as loss gas and the gas desorption quantity of sample, calculate loss Gas content and the stripping gas content of sample.
10. a kind of air content measuring method according to claim 9, it is characterised in that also include following contrast experiment:
Take the calibrated bolck with testing sample formed objects and be directly placed in pressure-bearing tank, pressure-bearing tank evacuation is processed, and to the heating of pressure-bearing tank to same temperature T, to pressure-bearing tank filling methane gas to same pressure P1, it is N that record is filled with the methane gas scale of construction of pressure-bearing tank0;
Connecting gas collecting apparatus on pressure-bearing tank, record gas output of pressure-bearing tank when pressure returns to ambient pressure in pressure-bearing tank is M0;
With the methane gas total amount N of sample experiments in described step D1Methane gas scale of construction N with contrast experiment0Difference as the loss tolerance of sample, with total gas output M of sample experiments1Gas output M with contrast experiment0Difference as the gas desorption quantity of sample, calculate loss Gas content and the stripping gas content of sample.
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| CN106370260A (en) * | 2016-08-16 | 2017-02-01 | 中国石油天然气股份有限公司 | Method for measuring gas loss in shale gas content test |
| CN106442938A (en) * | 2016-10-17 | 2017-02-22 | 铜仁中能天然气有限公司 | Device used in surveying calculation method for accurately acquiring shale gas content |
| CN106970001A (en) * | 2017-04-28 | 2017-07-21 | 中国石油天然气股份有限公司 | Simulation test device and method for gas loss in shale gas content test |
| CN107511192A (en) * | 2017-10-23 | 2017-12-26 | 中国地质大学（北京） | A kind of gas-liquid pressure balance regulator and the draining gas collecting apparatus including the adjuster |
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| CN109297771A (en) * | 2018-10-31 | 2019-02-01 | 重庆大学 | Shale gas fast desorption test device |
| CN109738328A (en) * | 2019-01-28 | 2019-05-10 | 中粮粮油工业(巢湖)有限公司 | Vegetable oil inspiratory capacity rapid detection method under a kind of normal temperature and pressure |
| CN111398559A (en) * | 2020-03-06 | 2020-07-10 | 中国矿业大学(北京) | Shale hydrogen generation experimental device, experimental method and analysis method |
| CN112595626A (en) * | 2020-11-25 | 2021-04-02 | 王云帅 | Shale gas critical desorption pressure testing device |
| CN112595626B (en) * | 2020-11-25 | 2022-12-13 | 陕西圣和源实业有限公司 | Shale gas critical desorption pressure testing device |
| CN114397321A (en) * | 2021-12-28 | 2022-04-26 | 中国海洋大学 | Soil body three-phase separation device and separation method based on temperature and pressure effect |
| CN114397321B (en) * | 2021-12-28 | 2023-08-22 | 中国海洋大学 | Soil three-phase separation device and method based on temperature and pressure effect |
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