CN204359655U - A kind of gas hydrate porosity and osmotic coefficient investigating device - Google Patents

A kind of gas hydrate porosity and osmotic coefficient investigating device Download PDF

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Publication number
CN204359655U
CN204359655U CN201420651738.XU CN201420651738U CN204359655U CN 204359655 U CN204359655 U CN 204359655U CN 201420651738 U CN201420651738 U CN 201420651738U CN 204359655 U CN204359655 U CN 204359655U
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China
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gas hydrate
pressure
porosity
sample
gas
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CN201420651738.XU
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Chinese (zh)
Inventor
蒋宇静
公彬
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Shandong University of Science and Technology
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Shandong University of Science and Technology
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Abstract

The utility model relate to a kind of gas hydrate porosity and osmotic coefficient investigating device, particularly relates to gas hydrate porosity and osmotic coefficient investigating device in a kind of gas hydrate dissociation process.It is characterized in that gas hydrate sample is sealed in flexibility and can contracts in cover, then the two be positioned over together in clamping still, the piston of passage and the transmission of pressure of coming round with testing machine pressure chamber reserved by clamper.This invention comprises piston of exerting pressure, clamping still, flexibility can contracting sealing shroud.The utility model can the change of porosity in the real time measure gas hydrate dissociation process and infiltration coefficient.

Description

A kind of gas hydrate porosity and osmotic coefficient investigating device
Technical field
The utility model relate to a kind of gas hydrate porosity and osmotic coefficient investigating device, particularly relates to gas hydrate porosity and osmotic coefficient investigating device in a kind of gas hydrate dissociation process.
Background technology
Gas hydrate are the class ice formed under high pressure and cryogenic conditions by water and rock gas, non-stoichiometric, cage type crystalline compounds.Gas hydrate are a kind of energy of cleaning, are called 21 century new forms of energy by reputation.Wherein, the energy resource density (methane volumetric at standard conditions in per unit rock volume) of methane is very large, is 10 times of coal and black shale, 2.5 times of rock gas.
Gas hydrate are extensively distributed in the deepwater environment of continent, the area, slope on island, the bump pad of activity and passive continental margin, continental platform, polar region and ocean and some interior lakes at nature.The formation condition of gas hydrate: low temperature, temperature is generally lower than 10 DEG C; High pressure, pressure is generally higher than 10MPa; Sufficient rock gas (hydro carbons, based on methane) gas source; Favourable hydrate is composed and is deposited space.The gas source that gas hydrate are formed is mainly: the gas that the organic matter being present in deep produces by pyrolysis is also upwards migrated; Microbial degradation Effects of Organic Matter in Sediments and the gas produced; The gas that vulcanism produces; Air dissolves.According to the analysis of above condition and detection, gas hydrate are mainly distributed in high latitude land (tundra) and seabed.According to statistics, 90% marine site, all containing gas hydrate, is distributed in the Lu Po in each oceanic margin marine site, continental rise and basin and part interior sea, in particular surroundings, then and can at seabed surface enrichment.
Rock gas of gathering from natural gas hydrate deposit can make submarine sedimentary strata intensity reduce, and increases the instability of sea bed, geology may be caused to subside, the disasters such as submarine slide.How economical and efficient, the exploitation of gas hydrate of safety, the geologic hazards such as submarine slide and sedimentary deposit cave in can not be caused again simultaneously, need the mechanical characteristic furtheing investigate hydrate sediment, particularly study the change of hydrate reservoir porosity and permeability in recovery process and after exploitation.
Summary of the invention
The purpose of this utility model proposes a kind of gas hydrate porosity and osmotic coefficient investigating device, simple to operate, can measure the change of gas hydrate dissociation process mesoporosity rate and permeability in real time, fast and accurately, measured data are exploited the rear problem such as the stability in seabed and the control of submarine geological hazard for later researching natural gas hydrate and are provided basic data.
A kind of gas hydrate porosity that the utility model provides and osmotic coefficient investigating device it comprise the clamping still be made up of clamping still top and clamping still bottom, piston of exerting pressure, flexibility can contracting sealing shroud, air inlet inlet opening, exhaust outlet hole, confined pressure application well, wherein flexibility can be placed in clamping still inside by contracting sealing shroud, clamping still top and clamping still bottom are plugged in together, and sealed by O-ring seal, clamping still, exert pressure piston and flexibility contracting sealing shroud three can be centrally located at same straight line; Piston centre position of exerting pressure is provided with air admission hole, inlet opening; Clamping still top is provided with the exhaust, the osculum that are communicated with flexible gland and clamp still; The air admission hole, the water inlet that are communicated with flexible gland and clamping still is provided with bottom clamping still; The exhaust outlet hole being communicated with flexible gland and clamping still is provided with bottom clamping still; Confined pressure application well is provided with bottom clamping still; Confined pressure application well, exhaust outlet hole are provided with its opening and closing of solenoid control.
A kind of gas hydrate porosity that the utility model provides and osmotic coefficient investigating device have the following advantages: organically combined in gas hydrate triaxial test pressure chamber and gas hydrate reactor, avoid the decomposition of hydrate sample in making, dress sample process, achieve natural gas hydrate deposits matter sample porosity and permeability is measured in real time, fill up the blank of domestic hydrate sediment porosity and permeability real-time measurement equipment.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the utility model gas hydrate porosity and osmotic coefficient investigating device.
Fig. 2 is the device experiment assembling schematic diagram of the utility model gas hydrate porosity and osmotic coefficient investigating device.
In figure, each mark is as follows: 1 exert pressure piston bearing plate, 2 clamping still tops, 3 O-ring seals, 4 clamp still bottoms, 5 confined pressure application well, 6 air inlet inlet openings, bottom, 7 lower exhaust osculums, 8 flexibilities can contracting sealing shroud, 9 exhaust outlet holes, top, 10 pistons, 11 plunger shaft, 12 top air inlet inlet openings, 13 top air inlet water inlet taps, 14 upper pressure anvils, 15 bottom air inlet water inlet taps, 16 low pressure anvils.
Embodiment
Below in conjunction with accompanying drawing, the utility model is further described:
A kind of gas hydrate porosity and the concrete implementation step of osmotic coefficient investigating device as follows:
1) the gas hydrate sample having and formulate porosity, is made.Will according to certain porosity the big sample of gas hydrate made is inserted in flexibility and can, in contracting sealing shroud (wherein the method for making of big sample is mentioned in detail in other patents of same inventor), loads in clamping still; Then clamping still is put in testing machine pressure chamber, the hole on the clamping upper and lower air inlet inlet opening of still and testing machine two-way pressure anvil now should be noted to align; Sealing load room, connects confined pressure application well 5 solenoid valve; Two end faces up and down of base sample lead to the experimental gas with certain pressure reduction, meanwhile, by Control Assay local temperature ice powder in the base sample made just is melted completely, and dynamic sample local temperature makes specimen temperature maintain ; Treat that gas fully dissolves in base sample, regulate temperature and pressure, experimentally require that the experiment condition arranged now is positioned at the hydrate stable existence Area generation hydrate of phase equilibrium line, close 13 top air inlet water inlet taps and 15 bottom air inlet water inlet taps, keep temperature, pressure conditional stability, complete the making of sample;
2), external exhaust gas, drainage collection equipment is connected by sample top exhaust port 9 with sample bottom drainage interface 7;
3), 7,9 each air hole solenoid valves are communicated with;
4), choice experiment method simulating hydrate exploitation also acquisition and recording experimental data.
During the exploitation of decompression method simulating hydrate, according to the degree of depth residing for the gas hydrate reservoir of simulation, clamping still upper piston bearing plate applies pressure (namely pressure at right angle is applied to sample ).What keep around sample is temperature-resistant, simulates decompression method production of water compound by the confined pressure changing the environment residing for sample, experimentally precision need suitable pressure drop gradient is set, step pressure reducing, keep the vertical force suffered by sample simultaneously constant.The temperature, pressure environment debugged residing for sample opens the solenoid valve of 7,9 liang of air holes while starting to simulate decompression exploitation, in record simulation decompression recovery process, the displacement of piston 10, supposes that the elemental height of potpourri is , the height of the potpourri after pressurized is , then , for the decrement of potpourri under pressure effect.According to definition and the volume of mixture of soil mechanics mesoporosity ratio can not change, and order , before and after potpourri pressurized, cross-sectional area is constant simultaneously, thus obtains:
So obtain the void ratio needed for experiment: or in known experiment desired aperture gap than the height compressed required for potpourri under condition.What the experimental datas such as sample mechanics parameter were real-time be transferred to data processing equipments such as outside industrial computer, sample decompression is decomposed the gas that produces and water and is connected to outside collecting device by exhaust and drainage interface and can obtains aerogenesis in experimentation and product water number certificate respectively.
When needing to measure the permeability in sample decomposable process, opening 7 exhaust outlet holes and 13 top air inlet water inlet taps in said process, closing 9 exhaust outlet holes, top.13 top air inlet water inlet taps pass into the mixing wastewater with air stream of certain pressure and pressure remains unchanged, and the volume measuring gas and the water of discharging draws gas flow with the flow of water value, can obtain the effective permeability of gas phase and water according to formula below.
In formula: for airshed, mL/s; for discharge, mL/s; for gas viscosity, ; for the viscosity of water, ; L is coal sample length, cm; A is coal sample sectional area cm 2, , be respectively inlet and outlet pressure, MPa; for atmospheric pressure, MPa.
During the exploitation of heat shock method simulating hydrate, according to the degree of depth residing for the gas hydrate reservoir of simulation, clamping still upper piston bearing plate applies pressure and (namely pressure at right angle is applied to sample ).Keep the confined pressure around sample constant, can be realized by the superconducting magnet temperature controller in contracting sealing shroud by 8 flexibilities, magnetic conductor can control density and the direction of magnetic flux, changes the distribution of current in inductor, reaches required various heating requirements.Arrange the temperature required input control device of experiment can simulating hydrate heat shock method exploit, temperature-gradient method can also be realized simultaneously and control, realize the effect of repeatedly heat injection in the exploitation of simulation reality.The vertical force suffered by sample is kept while heating constant.The temperature, pressure environment debugged residing for sample opens the solenoid valve of 7,9 liang of air holes while starting simulation heating exploitation, the displacement of piston 10 in record simulation decompression recovery process.Suppose that the elemental height of sample is , the height of the potpourri after pressurized is , then , for pressure the decrement of the lower potpourri of effect.According to definition and the volume of mixture of soil mechanics mesoporosity ratio can not change, and order , before and after potpourri pressurized, cross-sectional area is constant simultaneously, thus obtains:
So obtain the void ratio needed for experiment: or at known experiment desired aperture gap ratio the height of the required compression of potpourri under condition .What the experimental datas such as sample mechanics parameter were real-time is transferred to the data processing equipments such as outside industrial computer, and the gas that sample heat resolve produces and water are connected to outside collecting device by exhaust and drainage interface and can obtain the aerogenesis in experimentation respectively and produce water number certificate.
When needing to measure the permeability in sample decomposable process, opening 7 exhaust outlet holes and 13 top air inlet water inlet taps in said process, closing 9 exhaust outlet holes, top.13 top air inlet water inlet taps pass into the mixing wastewater with air stream of certain pressure and pressure remains unchanged, and the volume measuring gas and the water of discharging draws gas flow with the flow of water value, can obtain the effective permeability of gas phase and water according to formula below.
In formula: for airshed, mL/s; for discharge, mL/s; for gas viscosity, ; for the viscosity of water, ; L is coal sample length, cm; A is coal sample sectional area cm 2, , be respectively inlet and outlet pressure, MPa; for atmospheric pressure, MPa.
The above embodiment, the embodiment that just the utility model is more preferably concrete, the usual change that those skilled in the art carries out within the scope of technical solutions of the utility model and replacement all should be included in protection domain of the present utility model.

Claims (1)

1. a gas hydrate porosity and osmotic coefficient investigating device, it is characterized in that: this device comprise by clamping still top and clamping still bottom form clamping still, piston of exerting pressure, flexibility can contracting sealing shroud, air inlet inlet opening, exhaust outlet hole, confined pressure application well, wherein flexibility can be placed in clamping still inside by contracting sealing shroud, clamping still top and clamping still bottom are plugged in together, and sealed by O-ring seal, clamping still, exert pressure piston and flexibility contracting sealing shroud three can be centrally located at same straight line.
CN201420651738.XU 2014-11-05 2014-11-05 A kind of gas hydrate porosity and osmotic coefficient investigating device Expired - Fee Related CN204359655U (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105169996A (en) * 2015-10-12 2015-12-23 西南石油大学 Pressure regulation tank used for natural gas hydrate experiments
CN107643240A (en) * 2016-11-30 2018-01-30 国家安全生产监督管理总局化学品登记中心 A kind of A types rendrock permeability test method
CN107643241A (en) * 2016-11-30 2018-01-30 国家安全生产监督管理总局化学品登记中心 A kind of A types rendrock infiltration experiment device
CN108761023A (en) * 2018-05-24 2018-11-06 大连理工大学 A kind of sea bed gas hydrate core boat-carrying multifunctional analysis laboratory installation
WO2020098071A1 (en) * 2018-11-12 2020-05-22 中国科学院广州能源研究所 Permeability test device for hydrate sediments

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105169996A (en) * 2015-10-12 2015-12-23 西南石油大学 Pressure regulation tank used for natural gas hydrate experiments
CN107643240A (en) * 2016-11-30 2018-01-30 国家安全生产监督管理总局化学品登记中心 A kind of A types rendrock permeability test method
CN107643241A (en) * 2016-11-30 2018-01-30 国家安全生产监督管理总局化学品登记中心 A kind of A types rendrock infiltration experiment device
CN108761023A (en) * 2018-05-24 2018-11-06 大连理工大学 A kind of sea bed gas hydrate core boat-carrying multifunctional analysis laboratory installation
WO2020098071A1 (en) * 2018-11-12 2020-05-22 中国科学院广州能源研究所 Permeability test device for hydrate sediments

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Granted publication date: 20150527

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