CN105044284A - Experimental device and experimental method for studying porous medium skeleton change in natural gas hydrate decomposition process - Google Patents
Experimental device and experimental method for studying porous medium skeleton change in natural gas hydrate decomposition process Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 60
- 238000000354 decomposition reaction Methods 0.000 title claims abstract description 52
- 230000008569 process Effects 0.000 title claims abstract description 43
- 230000008859 change Effects 0.000 title claims abstract description 41
- NMJORVOYSJLJGU-UHFFFAOYSA-N methane clathrate Chemical compound C.C.C.C.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O NMJORVOYSJLJGU-UHFFFAOYSA-N 0.000 title claims abstract description 35
- 238000002474 experimental method Methods 0.000 title claims description 20
- 238000005070 sampling Methods 0.000 claims abstract description 70
- 239000007788 liquid Substances 0.000 claims abstract description 58
- 239000007789 gas Substances 0.000 claims abstract description 35
- 238000005191 phase separation Methods 0.000 claims abstract description 20
- 238000012545 processing Methods 0.000 claims abstract description 12
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- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 42
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 21
- 239000003345 natural gas Substances 0.000 claims description 20
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- 238000010494 dissociation reaction Methods 0.000 claims description 11
- 230000005593 dissociations Effects 0.000 claims description 11
- 239000011435 rock Substances 0.000 claims description 10
- 230000029052 metamorphosis Effects 0.000 claims description 8
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- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 8
- 238000005516 engineering process Methods 0.000 description 8
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- 150000001875 compounds Chemical class 0.000 description 5
- 239000007790 solid phase Substances 0.000 description 5
- 229910052757 nitrogen Inorganic materials 0.000 description 4
- 238000011160 research Methods 0.000 description 4
- 229910052500 inorganic mineral Inorganic materials 0.000 description 3
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- 238000013508 migration Methods 0.000 description 3
- 239000011707 mineral Substances 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 150000004677 hydrates Chemical class 0.000 description 2
- 238000005065 mining Methods 0.000 description 2
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- VYQRBKCKQCRYEE-UHFFFAOYSA-N ctk1a7239 Chemical compound C12=CC=CC=C2N2CC=CC3=NC=CC1=C32 VYQRBKCKQCRYEE-UHFFFAOYSA-N 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
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Abstract
The invention discloses an experimental device for studying the porous medium skeleton change in a natural gas hydrate decomposition process. The experimental device consists of a fast sampling high pressure reaction kettle, an inlet control unit, an outlet control unit, an environment temperature control unit, a gas solid liquid three-phase separation unit and a data processing unit. According to the invention, the reaction kettle can be started quickly, and a porous medium skeleton can be taken out completely, so that the porous medium skeleton change caused by hydrate decomposition can be observed visually. Being simple to operate and easy to control, the experimental device and method are applicable to reaction kettles of various sizes and various shapes.
Description
Technical field
The present invention relates to multiphase porous flow and exploitation of gas hydrates field in porous medium, the experimental provision of particularly porous medium skeleton change in a kind of researching natural gas decomposition of hydrate process and experimental technique.
Background technology
Gas hydrate (Naturalgashydrate, NGH) are a kind of a kind of cage type crystalline compounds generated by rock gas and water under cryogenic high pressure, and its profile, as ice and snow shape, is met fire and both fired, be commonly called as " combustible ice ".Gas component in natural gas hydrate is methane (>90%) mainly, and the gas hydrate dissociation of 1m3 discharges about 160m at normal temperatures and pressures
3rock gas, so gas hydrate have high energy density.The gas hydrate of occurring in nature are mainly present in the sanidal deposit layer in ocean and tundra, land.1964, scientist is the gas hydrate of natural existence at tundra, Siberia Late Cambrian.In the near future, found in Black Sea to compose the gas hydrate be stored in marine bottom sediment.To the nineties in last century, scholar unanimously thinks in the industry, and the energy that global gas hydrate are stored exceedes the summation of all oil, coal and rock gas institute stored energy.In in the past 20 years, global range is launched to comprise deep-sea drilling project (DSDP) (DSDP), Ocean Drilling Program (ODP) and IODP (IODP) mining deposits to gas hydrate and is investigated.Estimation about 1015 ~ 1018 normal cubic metre of current water globe compound total amount, so gas hydrate (NGH) are considered to the substitute energy of 21 century petroleum gas most potentiality.Resource exploration shows, and NGH is all contained in China South Sea, East China sea slope-Chong Shenghai, Qinghai-Tibet tundra.Therefore, working out the recovery method that gas hydrate are effective, quick, economic, for large scale mining gas hydrate provide experiment basis and foundation, is the effective way alleviating the Pressure on Energy grown with each passing day.
So exploitation of gas hydrates technology is one of key link realizing natural gas hydrate resources exploitation.Different from conventional fossil energy, gas hydrate are present in porous medium with solid forms.The basic ideas of its exploitation are: by changing the temperature of gas hydrate stable existences-pressure ring border, i.e. hydrate phase balance condition, cause solid hydrate after reservoir decomposition in situ becomes rock gas and water again by rock gas extraction.Accordingly, scientist proposes several conventional production technique, as: voltage drop method, heat shock method and chemical-agent technique.Because hydrate mineral reserve geologic media is complicated, occurrence form is various, and recovery process contains phase transition process and the multiphase porous flow process of the heterogeneous system of complicated natural air-water-sediment-water compound-ice composition, in hydrate recovery process, the porous medium skeleton change of adjoint decomposition of hydrate is one of greatest problem run in the exploitation of current hydrate.The water that the gas hydrate deposited due to solid-state tax become flowing is gentle, and original hydrate mineral reserve geological characteristics great variety can occur, and such as permeability, factor of porosity, mechanical property and pore pressure all strong variations occur.Thus cause porous medium framework deformation, cause gas-solid-liquid three-phase mixed flow field, finally may cause stratum deformation.So whether the change of porous medium skeleton can completes smoothly for hydrate exploitation technology and the security of hydrate exploitation technology has important effect in researching natural gas decomposition of hydrate process.
At present comparatively advanced in the world hydrate Exploitation research, the effect that main research emphasis is decomposed hydrate phase change in different recovery methods, and the consumption transmission of heat in decomposition of hydrate process.But under full-scale condition, the understanding of the complicated phase transformation seepage flow mechanism of decomposition of hydrate process is also in fuzzy state.In current main hydrate exploitation simulated experiment, almost Ignore All decomposition of hydrate hides the impact of porous medium skeleton change on hydrate, in simulated experiment in the past, utilize bulky grain to form porous medium (particle diameter >100um), make the porous medium skeleton in decomposition of hydrate process change.But the porous medium particle diameter in actual hydrate mineral reserve is made up of jointly microparticle to the bulky grain of 500um of 0.01um, and porous medium framework deformation is inevitable in hydrate recovery process.One of them difficult point of current hydrate exploitation technology is exactly also lack understanding to the gas-solid-liquid three phase fluid flow mechanism containing the change of porous medium skeleton, need to obtain experimental data, and the impact of phase transformation seepage flow on hydrate sediment skeleton in decomposition of hydrate process lacks basic experimental data, and this is the key issue that hydrate stoping safety is evaluated, need experimental study.
Summary of the invention
The technical problem to be solved in the present invention be to provide a kind of can direct vision to the experimental provision of the metamorphosis with decomposition of hydrate porous medium skeleton and experimental technique.
Technical solution of the present invention is:
An experimental provision for porous medium skeleton change in researching natural gas decomposition of hydrate process, comprising can fast sampling autoclave, import barrier unit, outlet controlling unit, environment temperature control module, gas-solid-liquid three phase separation unit and data processing unit;
This can be placed in environment temperature control module by fast sampling autoclave, can in fast sampling autoclave filling porous medium in order to simulate geologic media;
Import barrier unit is used for injecting water and rock gas in fast sampling autoclave;
Outlet controlling unit is for control in gas hydrate dissociation experimentation can the top hole pressure of fast sampling autoclave;
Environment temperature control module is for controlling the temperature of gas hydrate generation/decomposable process and sampling process;
Gas-solid-liquid three phase separation unit is used for the gas-solid-liquid potpourri of discharging after the decomposition of hydrate that is warm to be separated, and the data of real time measure gas-solid-liquid three-phase output;
Can fast sampling autoclave, environment temperature control module, gas-solid-liquid three phase separation unit, outlet controlling unit, sensing element in import barrier unit be all connected with data processing unit by signal wire; This data processing unit is in order to the induced signal of each sensing element of acquisition and processing.
This experimental provision can fast sampling autoclave can direct vision to the metamorphosis with decomposition of hydrate porous medium skeleton, and metering outlet gas, solid, liquid three-phase output.In order to study different recovery method, Different Strata Water Under compound decomposes the multiphase porous flow problem containing migration of solid phases in gas recovery.
Describedly can comprise kettle cover, kettle and the quick opener for fast sampling by fast sampling autoclave, this quick opener comprises the clip for being fixedly connected with kettle by kettle cover, and by the rubber ring of kettle cover and kettle sealing.Arrange quick opener, make kettle cover and kettle quick-make/unlatching, adopt clip to fix, seal with elastometic washer makes can to get at 25MPa by the fast sampling autoclave top pressure that comprises kettle cover.
Described can fast sampling autoclave inside be cylindrical or rectangular parallelepiped, and its inwall is provided with the thin inner sleeve of one deck.After opening kettle cover fast, the thin inner sleeve of setting can convenient and swift complete taking-up porous medium sample block.The fast sampling autoclave opening time can be shorter than 30s.And hydrate Exploitation research associated high voltage reactor uses bolt to fix kettle cover and kettle substantially at present, opening time is often more than 1 hour, due to kettle cover of the prior art and the kettle opening time long, porous medium skeleton there occurs metamorphosis under the change of external condition, then lose observation porous medium skeleton with metamorphosis condition during gas hydrate dissociation.
The gas-liquid separator that described gas-solid-liquid three phase separation unit comprises screen cloth sand separator and connects with screen cloth sand separator.
Describedly can be greater than 0.5L by fast sampling autoclave internal capacity.Autoclave is reflected, and actual water compound hides the multiphase porous flow flox condition in exploitation.
Described porous medium particle diameter is less than 100um.In simulated experiment in the past, utilize bulky grain to form porous medium (particle diameter >100um), make the porous medium skeleton in decomposition of hydrate process change.Porous medium particle diameter of the present invention is less than 100um, and enough direct vision are to the porous medium skeleton change caused due to decomposition of hydrate.
Simulated injection well and recovery well can be arranged according to demand in fast sampling autoclave described.More real geologic modelling environment can be obtained.
Described outlet controlling unit adopts straight tube or large radian bent angle pipe to be connected with described gas-solid-liquid three phase separation unit.The smooth output of gas-solid-liquid three-phase mixture can be made, effectively avoid potpourri at inner pipeline plug plug.
Adopt an experimental technique for the experimental provision of porous medium skeleton change in above-mentioned researching natural gas decomposition of hydrate process, comprise the following steps:
S1: described environment temperature control module can be placed in by fast sampling autoclave by described, can in fast sampling autoclave filling porous medium in order to simulate geologic media; And set experimental situation temperature, water and rock gas can be injected in fast sampling autoclave by described import barrier unit to described, generate gas hydrate sample;
S2: after gas hydrate have generated, controls top hole pressure by described outlet controlling unit and described environment temperature control module controls decomposition temperature, the decomposition experiment of the sample of the generation in simulation S1;
S3: after having tested or experiment carry out in can directly observe or apparatus measures porous medium skeleton with the metamorphosis of gas hydrate dissociation.
Adopt screen cloth sand separator to connect with gas-liquid separator during described gas-solid-liquid three phase separation unit separation gas solidliquid mixture to use, first by solid-state separation, weigh the weight change record solid output of screen cloth sand separator, then be separated gas-liquid, and measure with balance and gas meter respectively.Can obtain gas-solid-liquid three-phase output data in real time accurately, and structure is simple.
When needing the porous medium skeleton change studying a certain moment, first described outlet controlling unit is closed, fast sampling autoclave bulk temperature-20 DEG C ~-40 DEG C can be reduced to by described by described environment temperature control module, decontrol completely after cooling described outlet controlling unit make described can Pressure Drop to atmospheric pressure in fast sampling autoclave, in 30s, kettle cover is opened, take out porous medium skeleton, directly observation or apparatus measures porous medium skeleton are with the metamorphosis of gas hydrate dissociation.Now, the residue water in reactor becomes ice state, and hydrate decomposes hardly due to " the self-shield effect " under cryogenic conditions.Now reactor is opened in 30s by the quick opener in reactor.Complete taking-up porous medium skeleton, by the impact directly observed or the technique study decomposition of hydrate of apparatus measures changes porous medium matrix morphology.
Beneficial effect of the present invention:
Reactor can be opened fast, complete taking-up porous medium skeleton, thus can arrive by direct vision, due to the porous medium skeleton change that decomposition of hydrate causes; Separately can containing the multiphase porous flow problem of migration of solid phases in researching natural gas decomposition of hydrate process; The real-time quantum of output of gas-solid-liquid three-phase in gas hydrate dissociation process can be obtained accurately; Simple to operate, be easy to control, be applicable to the reactor of all size and various shape; For hydrate exploitation technology provides infrastest data and theoretical foundation.
Accompanying drawing explanation
Fig. 1 is the block scheme of the experimental provision of porous medium skeleton change in gas hydrate dissociation process of the present invention;
Fig. 2 is the experimental provision schematic diagram of porous medium skeleton change in the researching natural gas decomposition of hydrate process of the embodiment of the present invention.
Embodiment
Embodiment:
Consult Fig. 1, an experimental provision for porous medium skeleton change in researching natural gas decomposition of hydrate process, comprising: can fast sampling autoclave, environment temperature control module, gas-solid-liquid three phase separation unit, outlet controlling unit, import barrier unit and data processing unit.Wherein can be placed in environment temperature control module for controlling the temperature of hydrate generation/decomposable process and sampling process by fast sampling autoclave.Can fast sampling autoclave by arrange open soon kettle cover realize open soon, be preferably kettle cover be fixedly connected with by clip with kettle, and use seal with elastometic washer; Simulated injection well and recovery well can arranged according to demand in fast sampling autoclave.Import barrier unit, can fast sampling autoclave, outlet controlling unit, gas-solid-liquid three phase separation unit to be connected successively with pipeline respectively by operation valve.Can fast sampling autoclave, environment temperature control module, gas-solid-liquid three phase separation unit, outlet controlling unit, be equipped with sensing element in import barrier unit, each sensing element is all connected with data processing unit by signal wire.
Further, porous medium can be filled up in fast sampling autoclave, inject water and rock gas by import barrier unit, and utilize environment temperature control module to control hydrate generation temperature, in order to generate hydrate sample.Decomposition experiment and porous medium skeleton deformation research can be started after hydrate sample has generated.When decomposition of hydrate experiment starts, top hole pressure is controlled by outlet controlling unit, along with decomposition of hydrate, can in fast sampling autoclave gas-solid-liquid potpourri to discharging outside fast sampling autoclave, the gas-solid-liquid potpourri of discharging is separated by gas-solid-liquid three phase separation unit, and real time measure by data processing unit record.In the process of whole decomposition of hydrate, when needing the porous medium skeleton change studying any instant, first outlet controlling unit is closed, fast sampling autoclave bulk temperature-20 DEG C ~-40 DEG C can be reduced to rapidly by environment temperature control module, decontrol outlet controlling unit completely after cooling, order can be reduced to atmospheric pressure rapidly by the pressure in fast sampling autoclave.Now, ice state can be become by the residue water in fast sampling autoclave, and hydrate decomposes hardly due to " the self-shield effect " under cryogenic conditions.Now by can opening by fast sampling autoclave by the quick opener in fast sampling autoclave.Utilization can thin inner sleeve in fast sampling autoclave, complete taking-up porous medium skeleton in 30s, by the impact directly observed or the technique study decomposition of hydrate of apparatus measures changes porous medium matrix morphology.
Further, can fast sampling autoclave kettle cover by quick opener closed/open, maximum design pressure can reach 25MPa.Take out for convenience of porous medium sample, reactor inside can be designed to cylindrical or rectangular parallelepiped.Reactor inwall establishes the thin inner sleeve of one deck, is opening fast after kettle cover opens, complete taking-up whole porous medium block when can destroy rapidly and not porous medium skeleton.Can be greater than 0.5L by fast sampling autoclave internal capacity, volume is too small cannot reflect that actual water compound hides the multiphase porous flow flox condition in exploitation.Can design temperature can measure as required in fast sampling autoclave, the physical property sensor such as pressure survey, in order to study the physicochemical change in the porous medium of decomposition of hydrate process.Confined pressure or axial compression system can also be increased to obtain more real geologic modelling environment.
Further, outlet controlling unit comprise top hole pressure control gear and stretch into can fast sampling autoclave simulation chamber in well bunch.Wherein the equipment and technology of outlet controlling unit demand fulfillment requires to include the well setting meeting different hydrate recovery method, and outlet controlling unit accurately can control top hole pressure, make the smooth output of gas-solid-liquid three-phase mixture, can effectively avoid gas-solid-liquid potpourri at inner pipeline plug plug.For reaching this technical goal, straight tube can be adopted to connect in outlet controlling unit, avoid bend pipe and valve as far as possible.When cannot avoid, adopt the valve that large radian bent angle pipe and high-pressure ball valve or other can make solid phase to pass through smoothly, to avoid line clogging.
Further, environment temperature control module need control hydrate generate and decompose time environment temperature, and can reduce rapidly can fast sampling autoclave temperature to minus 20 degrees to 40 degree.So environment temperature control module is preferably designed for utilize common temperature controlled water baths when hydrate generates or decompose, temperature range is 0-30 DEG C, and precision is higher, can reach 0.1 DEG C.And when fast cooling, the water in water-bath is found time, injection liquid nitrogen or other liquid coolants carry out fast cooling.Stop when temperature reaches minus 20 degrees adding liquid nitrogen, when temperature keeps low temperature higher than continuing to add liquid nitrogen during minus 20 degrees.
Further, gas-solid-liquid three phase separation unit can realize the gas-solid-liquid three phase separation of output and real time measure.For realizing this technique effect, screen cloth sand separator can be adopted to connect with gas-liquid separator and to use, first by solid-state separation, weigh the weight change record solid output of screen cloth sand separator, then be separated gas-liquid, and measure with balance and gas meter respectively.The advantage utilizing this to combine is can obtain gas-solid-liquid three-phase output data in real time accurately, and structure is simple.
Consult in Fig. 2, kettle cover, kettle and quick opener can be comprised by fast sampling autoclave 1; This quick opener comprises the clip for being fixedly connected with kettle by kettle cover, and by kettle cover and kettle sealing rubber ring.Can fast sampling autoclave 1, be placed in environment temperature control module (ice chest 10) for controlling the temperature of hydrate generation/decomposable process and sampling process.Can arrange simulated injection well and recovery well in fast sampling autoclave 1, can filling porous medium is in order to simulate geologic media in fast sampling autoclave, described porous medium particle diameter be less than 100um.
Import barrier unit is made up of liquid injection system 11, gas injection system 12 and evacuation system 13.Liquid injection system 11 is made up of duplex plunger pump 111, primary heater 112 and pressure transducer 113, and duplex plunger pump 111 controls water filling flow velocity, and primary heater 112 controls water filling temperature, and intake pressure monitored by pressure transducer 113.Gas injection system 12 is made up of gas cylinder 121, pressure regulator valve 122, air compressor machine 123, gas boosting pump 124 and flowmeter 125, wherein gas cylinder 121 provides source of the gas, pressure regulator valve 122 sets bleed pressure, air compressor machine 123 and gas supercharge pump 124 be gas boosting to reactor gas injection, and flowmeter 125 measures injecting gas flow.Evacuation system 13 is made up of vacuum meter 131, surge tank 132 and vacuum pump 133, the tail gas in reactor can be discharged and form vacuum.
Outlet controlling unit comprises top hole pressure control gear 100 and stretches into can well bunches 101 in fast sampling autoclave simulation chamber.
Gas-solid-liquid three phase separation unit is made up of screen cloth sand separator 21, counterbalance valve 22, gas-liquid separator 23, gas meter 24, liquid collection cylinder 25, electronic scales 26, and outlet controlling unit outlet connects screen cloth sand separator 21, realizes solid phase and is separated.Screen cloth sand separator 21 connects the counterbalance valve 22 be made up of buffer container 221, pointer tensimeter 222 and wobble pump 223 afterwards, and counterbalance valve 22 controls top hole pressure.Connect gas-liquid separator 23 after counterbalance valve 22, realize gas-liquid separation.Exhaust Gas is measured by gas meter 24, and liquid is collected by liquid collection cylinder 25, and then electronic scales 26 measures.
So that 1L can be set to by fast sampling autoclave internal capacity; 27 temperature measuring points can be evenly arranged altogether in fast sampling autoclave, 2 pressure measurement point, in order to study the physicochemical change in the porous medium of decomposition of hydrate process, the well head devising five-spot arrangement on autoclave can meet voltage drop method, heat injection method, the carrying out of the various hydrate recovery method experiments such as note inhibitor method.
Experiment needs to study the porous medium skeleton change that decomposition of hydrate starts latter 30 minute moment.When drop test proceeds to the 30th minute, first outlet controlling unit is closed, extract the chilled water in water-bath out, and the mode simultaneously by injecting liquid nitrogen fast sampling autoclave bulk temperature can be reduced to rapidly-20 DEG C ~-40 DEG C, decontrol counterbalance valve completely after cooling, order can be reduced to atmospheric pressure rapidly by the pressure in fast sampling autoclave.Now, ice state can be become by the residue water in fast sampling autoclave, and hydrate decomposes hardly due to " the self-shield effect " under cryogenic conditions.Now by can the fast sampling mechanism in fast sampling autoclave be opened by kettle cover.Complete taking-up porous medium skeleton, by the impact directly observed or the technique study decomposition of hydrate of apparatus measures changes porous medium matrix morphology.
In sum, the experimental provision of porous medium skeleton change in researching natural gas decomposition of hydrate process provided by the present invention, can containing the multiphase porous flow problem of migration of solid phases in researching natural gas decomposition of hydrate process; The real-time quantum of output of gas-solid-liquid three-phase in gas hydrate dissociation process can be obtained accurately; Can change to the porous medium skeleton caused due to decomposition of hydrate by direct vision; Simple to operate, be easy to control, be applicable to the reactor of all size and various shape; For hydrate exploitation technology provides infrastest data and theoretical foundation.
Above-listed detailed description is illustrating for possible embodiments of the present invention, and this embodiment is also not used to limit the scope of the claims of the present invention, and the equivalence that all the present invention of disengaging do is implemented or changed, and all should be contained in the scope of the claims of this case.
Claims (10)
1. an experimental provision for porous medium skeleton change in researching natural gas decomposition of hydrate process, is characterized in that: comprising can fast sampling autoclave, import barrier unit, outlet controlling unit, environment temperature control module, gas-solid-liquid three phase separation unit and data processing unit;
This can be placed in environment temperature control module by fast sampling autoclave, can in fast sampling autoclave filling porous medium in order to simulate geologic media;
Import barrier unit is used for injecting water and rock gas in fast sampling autoclave;
Outlet controlling unit the top hole pressure of fast sampling autoclave can make the smooth output of gas-solid-liquid three-phase mixture for control in gas hydrate dissociation experimentation;
Environment temperature control module is for controlling the temperature of gas hydrate generation/decomposable process and sampling process;
Gas-solid-liquid three phase separation unit is used for the gas-solid-liquid potpourri of discharging after the decomposition of hydrate that is warm to be separated, and the data of real time measure gas-solid-liquid three-phase output;
Can fast sampling autoclave, environment temperature control module, gas-solid-liquid three phase separation unit, outlet controlling unit, sensing element in import barrier unit be all connected with data processing unit by signal wire; This data processing unit is in order to the induced signal of each sensing element of acquisition and processing.
2. the experimental provision of porous medium skeleton change in researching natural gas decomposition of hydrate process according to claim 1, is characterized in that: describedly can comprise kettle cover, kettle and quick opener by fast sampling autoclave; This quick opener comprises the clip for being fixedly connected with kettle by kettle cover, and by kettle cover and kettle sealing rubber ring.
3. the experimental provision of porous medium skeleton change in researching natural gas decomposition of hydrate process according to claim 1 and 2, is characterized in that: described can fast sampling autoclave inside be cylindrical or rectangular parallelepiped, and its inwall is provided with the thin inner sleeve of one deck.
4. the experimental provision of porous medium skeleton change in researching natural gas decomposition of hydrate process according to claim 1, is characterized in that: the gas-liquid separator that described gas-solid-liquid three phase separation unit comprises screen cloth sand separator and connects with screen cloth sand separator.
5. the experimental provision of porous medium skeleton change in researching natural gas decomposition of hydrate process according to claim 1, is characterized in that: describedly can be greater than 0.5L by fast sampling autoclave internal capacity.
6. the experimental provision of porous medium skeleton change in researching natural gas decomposition of hydrate process according to claim 1, is characterized in that: described porous medium particle diameter is less than 100um.
7. the experimental provision of porous medium skeleton change in researching natural gas decomposition of hydrate process according to claim 1, is characterized in that: described outlet controlling unit adopts straight tube or large radian bent angle pipe to be connected with described gas-solid-liquid three phase separation unit.
8. adopt an experimental technique for the experimental provision of porous medium skeleton change in researching natural gas decomposition of hydrate process according to claim 1, it is characterized in that: comprise the following steps:
S1: described environment temperature control module can be placed in by fast sampling autoclave by described, can in fast sampling autoclave filling porous medium in order to simulate geologic media, and set experimental situation temperature, water and rock gas can be injected in fast sampling autoclave by described import barrier unit to described, generate gas hydrate sample;
S2: after gas hydrate have generated, controls top hole pressure by described outlet controlling unit and described environment temperature control module controls decomposition temperature, the decomposition experiment of the sample generated in simulation S1;
S3: after having tested or experiment carry out in can directly observe or apparatus measures porous medium skeleton with the metamorphosis of gas hydrate dissociation.
9. the experimental technique of experimental provision of porous medium skeleton change in researching natural gas decomposition of hydrate process according to claim 8, it is characterized in that: adopt screen cloth sand separator to connect with gas-liquid separator during described gas-solid-liquid three phase separation unit separation gas solidliquid mixture and use, first by solid-state separation, weigh the weight change record solid output of screen cloth sand separator, be separated gas-liquid again, and measure with balance and gas meter respectively.
10. the experimental technique of experimental provision of porous medium skeleton change in researching natural gas decomposition of hydrate process according to claim 8, it is characterized in that: when needing the porous medium skeleton change studying any instant, first described outlet controlling unit is closed, fast sampling autoclave bulk temperature-20 DEG C ~-40 DEG C can be reduced to by described by described environment temperature control module, decontrol completely after cooling described outlet controlling unit make described can Pressure Drop to atmospheric pressure in fast sampling autoclave, in 30s, kettle cover is opened, take out porous medium skeleton, direct observation or apparatus measures porous medium skeleton are with the metamorphosis of gas hydrate dissociation.
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