CN203053811U - Isothermal adsorption/desorption experimental device for danks - Google Patents
Isothermal adsorption/desorption experimental device for danks Download PDFInfo
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- CN203053811U CN203053811U CN 201320046911 CN201320046911U CN203053811U CN 203053811 U CN203053811 U CN 203053811U CN 201320046911 CN201320046911 CN 201320046911 CN 201320046911 U CN201320046911 U CN 201320046911U CN 203053811 U CN203053811 U CN 203053811U
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Abstract
The utility model provides an isothermal adsorption/desorption experimental device for danks. The device is mainly composed of a true triaxial core clamping and pressurizing system, a system pressure sensor, a system temperature sensor, an inlet end high-grade pressure gauge, an inlet end high-precision gas mass flow meter, an outlet end high-precision gas mass flow meter, a vacuum pump, a high-pressure helium bottle, a high-pressure to-be-tested gas cylinder, a calorstat, corresponding pipelines and valves. A danks test sample is put in the true triaxial core clamping and pressurizing system, the initial measurement state of the test sample is set according to actual formation conditions, after calibration of free pore volume, the adsorption/desorption experiment of the test sample is performed, the accumulated gas flow value and the system pressure value after balance are measured and recorded by the inlet end or outlet end gas mass flow meter and the system pressure sensor, respectively, and the adsorption gas volume is obtained through calculation, so that the isothermal adsorption/desorption curve of the danks test sample can be drawn.
Description
Technical field:
The utility model relates to a kind of experimental provision of measuring danks surface gas adsorption/desorption amount and adsorption/desorption curve, refers to measure the experimental provision of danks surface gas adsorption/desorption amount and adsorption/desorption curve under the layer state truly such as differently stress, different temperatures etc. especially.
Background technology:
The experimental technique of measuring gas isothermal adsorption/desorption curve in danks at present mainly contains pressure application, volumetric method and gravitational method.Pressure application is method at present commonly used, and its experimental provision is mainly by gas cylinder, vacuum pump, form with reference to cylinder, sample cylinder, pressure gauge and constant temperature oil bath (or constant temperature oven).Pressure application is to measure the method that the gas-solid adsorption curve is most widely used at present, but its complicated operating process, and higher to manometric accuracy requirement.The volumetric method device mainly by vacuum pump, piston pump, with reference to cylinder, sample cylinder, pressure gauge, constant temperature oil bath (or constant temperature oven), its principle is similar to pressure application, difference is, the volume that charges into gas is that the volume change by piston pump records.But volumetric method is high to the pressure precision requirement of piston pump, and complicated operating process.There are larger difference in the experimental provision that gravitational method adopts and principle and said two devices, and its main device hangs balance, high-pressure sealed cylinder and constant temperature oven by electromagnetism and forms.Wherein, airtight cylinder is separated into two confined chambers, and coal sample to be measured and gases at high pressure place respectively in two confined chambers.The used experimental provision cost of gravitational method is relatively costly, uses few at present.And under true formation condition, fluid in coal petrography or the shale is subjected to the coupling in many in stress field, temperature field etc., and the adsorption/desorption of actual coal-seam gas or shale gas is one and has the very long geochronic continuous physical mechanical process that is subjected to many couplings.The effect in stress field and temperature field must cause the adsorption/desorption of actual coal-seam gas or shale gas and Diffusion Law that the characteristic that differs under the unstressed condition is arranged.And the domestic existing experimental provision can't be realized the real simulation to formation condition, namely can't measure the isothermal adsorption/desorption curve under the true danks reservoir conditions under many couplings such as stress field, temperature field, and then influences the credibility of experimental result.
Summary of the invention:
The purpose of this utility model is to provide a kind of danks isothermal adsorption/desorption experimental provision, is used for measuring differently danks surface gas adsorption/desorption amount and isothermal adsorption/desorption curve under the layer state truly such as stress, different temperatures.
The purpose of this utility model realizes according to following design: described experimental provision mainly is made up of vacuum pump, high pressure helium gas cylinder, high pressure gas cylinder to be measured, inlet end high-grade pressure gauge, inlet end high-precision gas mass flowmeter, endpiece high-precision gas mass flowmeter, true triaxial core clamping and compression system, system pressure sensor, system temperature sensor, constant temperature oven and respective lines, valve.Described inlet end high-precision gas mass flowmeter interface and true triaxial core grasping system air intake opening, inlet end high-grade pressure gauge interface are connected in series by pipeline; Inlet end is equipped with four-way piece, and four interfaces of described four-way piece link to each other with vacuum pump with inlet end high-grade pressure gauge interface, high pressure gas cylinder reduction valve outlet to be measured, the outlet of high pressure helium gas cylinder reduction valve respectively; Described vacuum pump interface arranges a valve; Described endpiece high-precision gas mass flowmeter interface is connected by pipeline with true triaxial core grasping system gas outlet, and the centre arranges the venting valve.Described true triaxial core grasping system is packed in the constant temperature oven, and described constant temperature oven is used for arranging and keeping the real formation temperature conditions of sample test specimen.
Described true triaxial core clamping and compression system adds the system of holding by true triaxial core and hydraulic servo control system is formed, the supporting automatic pressure oil pump of Z axle of described hydraulic servo control system and two X, the automatic pressure oil pump of Y-axis, the automatic pressure oil pump of described Z axle links by the Z axle oil-in of pipeline and described true triaxial core grasping system, to Z axle piston cylinder infusion liquid, described X, the automatic pressure oil pump of Y-axis respectively with the X of described true triaxial core grasping system, the Y-axis oil-in links, directly to described X, infusion liquid in the Y confined pressure packing element realizes that axial compression loading and confined pressure load.
Further, described automatic pressure oil pump can be realized automatic value-added tax function by computer control, possesses constant current and constant voltage function.
Described true triaxial core grasping system is made up of clamp body, X, Y confined pressure packing element, rock core packing element, Z jack-post plug, Z axial pressure chamber, loam cake, sealing platen, packing element grommet, stop grommet, stop plug, stop plunger.Be processed with cross special-shaped hole vertically in the middle of the described clamp body, spatially form four groove opposite, groove is used for placing X, Y confined pressure packing element and rock core packing element; Described X, Y confined pressure packing element are four prolate square hollow cylinders, the rubber material, and end sealing, an end is the opening that has flange, is used for inserting the pressure of sealing platen sealing X, Y-direction; Described rock core packing element center has the column type through hole, the rubber material, and the heart cylindrical rock core of can packing into therein, two ends are pressed into the packing element grommet respectively, the stop grommet plays and supports and the auxiliary seal effect, insert described Z jack-post plug and described stop plunger; The end face of described stop plunger and described Z jack-post plug offers the waterline groove of the mutual communications and liaison of ring-type, and warranty test medium and rock core have bigger contact area.
The beneficial effects of the utility model:
1, concentrated expression the influences to danks surface gas adsorption/desorption such as stress, pore pressure, temperature, both can carry out the test under the single-factor influence, also can carry out the test under the multifactor coupling, the test of carrying out can be reproduced the residing environment of actual danks surface gas adsorption/desorption more realistically.
2, the sensor that data acquisition system adopted sensitivity and degree of accuracy are higher and mass-flow gas meter comprise system pressure sensor, system temperature sensor, mass-flow gas meter etc., have guaranteed the reliability of data acquisition.
3, stress loads the servo apply hydraulic pressure system, and loading procedure is stable, and can guarantee loading accuracy, can realize that circulation adds testing programs such as unloaded.
4, adopt high-precision gas mass flow meter measurement danks to adsorb gas flow to be measured, not only simplified experimental provision, and also simplification greatly of experiment process, late time data processing and amount of calculation are less relatively.
Description of drawings:
Fig. 1 is the synoptic diagram of an embodiment of the utility model.
Among the figure, the 1-vacuum pump; 2-vacuum pump valve; 3-high pressure helium gas cylinder; 4-high pressure gas cylinder to be measured; 5-high pressure helium gas cylinder air outlet valve door; 6-high pressure helium gas cylinder reduction valve; The 7-high pressure gas cylinder to be measured valve of giving vent to anger; 8-high pressure gas cylinder reduction valve to be measured; 9-inlet end high-grade pressure gauge; 10-inlet end high-precision gas mass flowmeter; 11-system pressure sensor; The true triaxial core clamping of 12-and compression system; The 13-constant temperature oven; 14-system temperature sensor; 15-endpiece venting valve; 16-endpiece high-precision gas mass flowmeter.
Embodiment:
Below in conjunction with drawings and Examples the utility model is described in further detail, but does not limit practical range of the present utility model.
Be that example is explained operating process of the present utility model with the isothermal adsorption/desorption experiment of methane (purity〉99.99%) in certain coal sample of south, basin, Qinshui below.
Referring to Fig. 1, at first the raw coal coal sample of Φ 50 * 100mm of drilling through is placed in the climatic chamber saturation water to use in order to test.Coal petrography or shale sample test specimen are packed in true triaxial core clamping and the compression system 12; Connect constant temperature oven 13 power supplys, set 23 ℃ of experimental temperatures according to the actual formation temperature, by temperature in the system temperature sensor 14 monitoring core holding units; And refuel to the triaxial cell emptying of true triaxial core clamping and compression system 12, check whether operate as normal of each system; After arrangement finishes, close vacuum pump valve 2, high pressure gas cylinder to be measured give vent to anger valve 7 and endpiece venting valve 15, open high pressure helium gas cylinder air outlet valve door 5, close the valve 5 of giving vent to anger after charging into a certain amount of helium in the system, treat to change every 1h register system pressure after the pressure stability, if system pressure does not have significant change in the 6h, illustrate that then impermeability is good; If system pressure changes obviously, illustrate that impermeability is relatively poor, need reexamine and assemble experimental provision.If impermeability is good, then open vacuum pump 1, open vacuum pump valve 2, the sample test specimen is outgased, and in order to eliminate the coal sample absorbed air to the influence of test findings, the degassing time is 3-6h, do not have significant change until system pressure, close vacuum pump 1 and vacuum pump valve 2; True triaxial core grasping system 12 integral body are put into constant temperature oven 13, and according to actual formation condition setting confined pressure 8.21MPa; Open high pressure helium gas cylinder air outlet valve door 5, after charging into a certain amount of helium (purity＞99.999%) to true triaxial core grasping system 12, close the valve 5 of giving vent to anger, after treating that system pressure is stable, respectively by inlet end high-precision gas mass flowmeter 10 and system pressure sensor 11 measured and record charges into methane gas quality and system pressure, according to the free space volumes of formula (1) computing system; Repeated experiments three times is averaged as free space volumes; Open vacuum pump 1, open vacuum pump valve 2, system is vacuumized, the duration is about 6h, does not have significant change until pressure, closes vacuum pump 1 and vacuum pump valve 2; Open inlet end high-precision gas mass flowmeter 10 power switches and high pressure methane gas cylinder reduction valve 8, regulate the high pressure methane gas cylinder valve 7 of giving vent to anger, charge into methane gas (purity〉99.99%) in the system to experimental design pressure, close the valve 7 of giving vent to anger, charge into the quality of gas according to inlet end high-precision gas mass flowmeter 10 records; Treat (time is generally 24-48h) after the system pressure balance, by the system pressure after the system pressure sensor 11 record balances, calculate and record the adsorbed gas volume of this equalized pressure correspondence according to formula (2); Improve system experimentation pressure successively, charge into methane gas to true triaxial core clamping and compression system 12, adsorption equilibrium pressure is increased gradually, can record the isothermal adsorption curve of methane in coal petrography.After reaching the highest contrived experiment force value, carry out the desorption experiment process by isothermal adsorption experiment repeatedly.Close inlet end high-precision gas mass flowmeter 10 power switches, open endpiece high-precision gas mass flowmeter 16 power switches, slowly open endpiece venting valve 15, emit the part methane gas to experimental design pressure, close venting valve 15, emit the quality of gas according to endpiece high-precision gas mass flowmeter 16 records, treat (time is generally 24-48h) after the system pressure balance, by the system pressure after the system pressure sensor 11 record balances, according to the adsorbed gas scale of construction in formula (3) the calculating desorption process.Repeat to discharge the operation of methane gas, and calculate and record methane adsorbance corresponding under this equalized pressure according to formula (3), reduce system experimentation pressure one by one and test, until reaching minimum experimental pressure, can draw desorption process methane isothermal adsorption curve.
In sum; it below only is preferred embodiment of the present utility model; but protection domain of the present utility model is not limited thereto; anyly be familiar with those skilled in the art in the technical scope that the utility model discloses; the variation that can expect easily or conversion all should be encompassed within the protection domain of the present utility model.Therefore, protection domain of the present utility model should be as the criterion with the protection domain that claim was defined.
Claims (3)
1. danks isothermal adsorption/desorption experimental provision, comprise true triaxial core clamping and compression system, system pressure sensor, system temperature sensor, inlet end high-grade pressure gauge, inlet end high-precision gas mass flowmeter, endpiece high-precision gas mass flowmeter, vacuum pump, high pressure helium gas cylinder, high pressure gas cylinder to be measured, constant temperature oven, pipeline and valve, it is characterized in that described inlet end high-precision gas mass flowmeter interface is connected by pipeline with true triaxial core grasping system air intake opening, inlet end high-grade pressure gauge interface; Described inlet end high-grade pressure gauge interface is connected with the four-way piece of inlet end; Four interfaces of described four-way piece link to each other with vacuum pump with inlet end high-grade pressure gauge interface, high pressure gas cylinder reduction valve outlet to be measured, the outlet of high pressure helium gas cylinder reduction valve respectively; Described vacuum pump interface arranges a valve; Described endpiece high-precision gas mass flowmeter interface is connected by pipeline with true triaxial core grasping system gas outlet, and the centre arranges the venting valve.
2. danks isothermal adsorption/desorption experimental provision as claimed in claim 1, it is characterized in that, described true triaxial core clamping and compression system adds the system of holding by true triaxial core and hydraulic servo control system is formed, the supporting automatic pressure oil pump of Z axle of described hydraulic servo control system and two X, the automatic pressure oil pump of Y-axis, the automatic pressure oil pump of described Z axle links by the Z axle oil-in of pipeline and described true triaxial core grasping system, to Z axle piston cylinder infusion liquid, described X, the automatic pressure oil pump of Y-axis respectively with the X of described true triaxial core grasping system, the Y-axis oil-in links, directly to described X, infusion liquid in the Y confined pressure packing element realizes that axial compression loading and confined pressure load.
3. danks isothermal adsorption/desorption experimental provision as claimed in claim 1 is characterized in that, described true triaxial core grasping system is packed in the constant temperature oven.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201320046911 CN203053811U (en) | 2013-01-28 | 2013-01-28 | Isothermal adsorption/desorption experimental device for danks |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201320046911 CN203053811U (en) | 2013-01-28 | 2013-01-28 | Isothermal adsorption/desorption experimental device for danks |
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| CN203053811U true CN203053811U (en) | 2013-07-10 |
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| CN 201320046911 Expired - Fee Related CN203053811U (en) | 2013-01-28 | 2013-01-28 | Isothermal adsorption/desorption experimental device for danks |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103149118A (en) * | 2013-01-28 | 2013-06-12 | 中国石油大学(华东) | Carbonaceous shale isothermal adsorption/desorption experimental device |
| CN105181556A (en) * | 2015-09-25 | 2015-12-23 | 山东科技大学 | Diffusivity testing method for gas in coal on triaxial stress condition |
| CN106644820A (en) * | 2016-12-29 | 2017-05-10 | 重庆科技学院 | Shale gas desorption capacity tester under action of slickwater |
| CN108760802A (en) * | 2018-05-21 | 2018-11-06 | 辽宁工程技术大学 | Temperature Evolution token test device and method during coal petrography adsorption-desorption gas |
| CN109142669A (en) * | 2018-09-27 | 2019-01-04 | 西安科技大学 | One kind being based on the relevant coal-bed gas parameter rapid assay methods of data |
| CN109991120A (en) * | 2019-05-09 | 2019-07-09 | 陕西省煤田地质集团有限公司 | Rock covers isothermal adsorption/desorption and displacement test equipment and method under press strip part |
-
2013
- 2013-01-28 CN CN 201320046911 patent/CN203053811U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103149118A (en) * | 2013-01-28 | 2013-06-12 | 中国石油大学(华东) | Carbonaceous shale isothermal adsorption/desorption experimental device |
| CN105181556A (en) * | 2015-09-25 | 2015-12-23 | 山东科技大学 | Diffusivity testing method for gas in coal on triaxial stress condition |
| CN105181556B (en) * | 2015-09-25 | 2017-10-20 | 山东科技大学 | Diffusibility of gases method of testing in coal under a kind of condition of triaxial stress |
| CN106644820A (en) * | 2016-12-29 | 2017-05-10 | 重庆科技学院 | Shale gas desorption capacity tester under action of slickwater |
| CN108760802A (en) * | 2018-05-21 | 2018-11-06 | 辽宁工程技术大学 | Temperature Evolution token test device and method during coal petrography adsorption-desorption gas |
| CN109142669A (en) * | 2018-09-27 | 2019-01-04 | 西安科技大学 | One kind being based on the relevant coal-bed gas parameter rapid assay methods of data |
| CN109991120A (en) * | 2019-05-09 | 2019-07-09 | 陕西省煤田地质集团有限公司 | Rock covers isothermal adsorption/desorption and displacement test equipment and method under press strip part |
| CN109991120B (en) * | 2019-05-09 | 2024-01-26 | 陕西省煤田地质集团有限公司 | Testing method of isothermal adsorption/desorption and displacement testing equipment under rock overburden condition |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130710 Termination date: 20150128 |
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| EXPY | Termination of patent right or utility model |