CN101936833A - Device and method for simulating generation of gas hydrate and measuring physical property parameters thereof - Google Patents
Device and method for simulating generation of gas hydrate and measuring physical property parameters thereof Download PDFInfo
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- CN101936833A CN101936833A CN 201010234917 CN201010234917A CN101936833A CN 101936833 A CN101936833 A CN 101936833A CN 201010234917 CN201010234917 CN 201010234917 CN 201010234917 A CN201010234917 A CN 201010234917A CN 101936833 A CN101936833 A CN 101936833A
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Abstract
The invention relates to a device and a method for simulating generation of a gas hydrate and measuring physical property parameters thereof. The device is characterized by comprising a high-pressure reactor which is respectively connected with a high-pressure gas distribution system, a temperature measuring system, a pressure measuring system and an ultrasonic sound velocity measuring system, wherein the high-pressure reactor is arranged in a cold bath tank connected with a refrigeration compressor; a handle slide rod is slidingly inserted at the top of the high-pressure reactor; the ultrasonic sound velocity measuring system comprises two ultrasound probes respectively arranged at the bottom of the handle slide rod and the bottom in the high-pressure reactor, and the two ultrasound probes are respectively connected with an acoustoelectric transducer; one acoustoelectric transducer is connected with the transmitting end of an ultrasonic signal transmitter-receiver through a lead, while the other acoustoelectric transducer is connected with the receiving end of the ultrasonic signal transmitter-receiver through a lead; the ultrasonic signal transmitter-receiver is connected with an oscilloscope, and the output end of the oscilloscope is connected with a computer acquisition system; and a gas hydrate sound wave acquisition and analysis module is preset in the computer acquisition system.
Description
Technical field
The present invention relates to a kind of measurement mechanism and method, particularly about a kind of device and method of simulating the gas hydrate generation and measuring its physical parameter.
Background technology
It is medium that gas hydrate are distributed widely in the bump pad of area, slope, activity and the passive continental margin on island, continent, extremely low ocean, continental platform and deepwater environment.Every cubic metre gas hydrate can store 160～180m
3Rock gas, be described as important alternative energy of 21 century.Gas hydrate are as a kind of energy resources, and its exploratory development has been subjected to the great attention of countries in the world government and research institution, and the research of gas hydrate is also become hot research in recent years.Understand stock number and the basic distribution characteristics thereof of gas hydrate, the exploratory development of natural gas source is had important directive significance on the stratum.Because the stock number of gas hydrate and area, reservoir thickness, the factor of porosity of hydrate layer, and parameters such as the saturation degree of hydrate, hydrate index are closely related; And under field conditions (factors), gas hydrate are because of composing the difference of dis environment, these parameters often are subjected to all multifactor influences such as variation with the degree of depth of sedimental material composition, abundance of organic matter, geologic structure, ground temperature field, geothermic gradient, ocean temperature pressure, therefore, at present imperfect as yet to the evaluation method of gas hydrate stock number, estimation to its stock number has predictive more, and the estimation differ greatly.
The generation of simulation gas hydrate and be a fundamental research of natural gas hydrate exploration exploitation to the measurement of every physical parameter in its production run wherein becomes the key of study on the efficiency to the measurement of the every physical parameter of gas hydrate.In the experiment that the simulation gas hydrate generate, the method that the every physical parameter of gas hydrate is detected commonly used has optical method, acoustic method and electric method etc.But the experimental provision that adopts said method to measure at present is fewer.Wherein: the experimental provision GHASTLI detection means of US Geological Survey is more, comprises the supersonic sounding technology, but can only be used for core sample, can not be used for loose sediment; The experimental provision of Qingdao Inst of Marine Geology is equipped with the supersonic sounding technology, and the detection system of light percent of pass is arranged, but light percent of pass detection system can not be used for the detection of sediment hydrate; The experimental provision of lapicide institute of China Petroleum Univ. (East-China) also is equipped with acoustic velocity measutement, its voltage that is applied to sensor is 1000V, pulsed frequency is 2MPa, its voltage and pulsed frequency are higher, pulsed frequency difference with well-shooting is bigger, though can measure the velocity of sound of hydrate in the sediment, homogeneity the unknown that hydrate distributes in the synthetic sediment sample.
Summary of the invention
At the problems referred to above, the purpose of this invention is to provide a kind of device and method that natural gas hydrate generated and measured its physical parameter of simulating, this device and method can change the physical parameter of gas hydrate in the unconsolidated sediment in generation/decomposable process be measured, and then provides physical parameter accurately for the exploration and the stock number estimation of gas hydrate resource.
For achieving the above object, the present invention takes following technical scheme: a kind of device of simulating the gas hydrate generation and measuring its physical parameter, it is characterized in that: it comprises its interior autoclave of filling test medium, described autoclave connects a high-pressure natural gas gas distributing system, a temperature measurement system, a pressure-measuring system and a ultrasonic velocity measuring system respectively, described autoclave is arranged in the cryostat groove, and described cryostat groove connects a refrigeration compressor; Described autoclave top is provided with a kettle cover, and sliding on the described kettle cover is inserted with the one handle slide bar; Described ultrasonic velocity measuring system comprises a ultrasonic probe that is separately positioned on described autoclave interior described handle slide bar bottom and described autoclave inner bottom part, two described ultrasonic probes are connected with an acoustic-electrical transducer respectively, wherein a described acoustic-electrical transducer is wired to the transmitting terminal that instrument is accepted in ultrasonic signal emission, another described acoustic-electrical transducer is wired to the receiving end that instrument is accepted in described ultrasonic signal emission, described ultrasonic signal emission is accepted instrument and is connected an oscillograph by lead, described oscillographic output terminal connects a computer acquisition system by lead, presets gas hydrate sound collecting analysis module in the described computer acquisition system.
The still wall top of described autoclave is provided with air intake opening on, and the bottom is provided with an air intake opening and a freeing port, and described freeing port is connected to described cryostat groove outside by its discharge pipe line that is provided with stop valve.
Described high-pressure natural gas gas distributing system comprises a high-pressure natural gas distribution bottle, the output pipe of described high-pressure natural gas distribution bottle is connected a gas meter and a six-way valve by a stop valve with a reduction valve successively side by side, also is provided with a stop valve between described six-way valve and the described output pipe; The output terminal of described gas meter connects described six-way valve by a stop valve; Described six-way valve has three output terminals, wherein an output terminal connects a vacuum pump by a stop valve, one output terminal connects atmosphere by a stop valve, also have an output terminal to connect two stop valves side by side, wherein the output terminal of a described stop valve is connected to the described air intake opening of going up of described autoclave, and the output terminal of another described stop valve is connected to the described gas port of described autoclave.
Described temperature measurement system comprises the thermopair that is arranged on the described autoclave inwall, and the output terminal of described thermopair connects a temperature indicator by a temperature sensor.
Described pressure-measuring system comprises the pressure transducer that is arranged on the described autoclave inner roof wall, and the output terminal of described pressure transducer connects a pressure display instrument.
The simulation gas hydrate of said apparatus generate and measure the method for its physical parameter, it may further comprise the steps: 1) as required, according to arbitrary proportion with sediment and aqueous solution evenly after, pack in the autoclave, install kettle cover, autoclave is put into the cryostat groove, connect high-pressure natural gas gas distributing system, temperature measurement system, pressure-measuring system and ultrasonic velocity and measure system, the adjusting handle slide bar makes between two ultrasonic probes and keeps certain distance, and distance range is 0～60mm; 2) open refrigeration compressor, make and reach in the cryostat groove and keep design temperature below freezing point of solution, instrument and oscillograph are accepted in the ultrasonic signal emission of opening simultaneously in the ultrasonic velocity mensuration system, by the gas hydrate sound collecting analysis module that presets in the computer acquisition system, the parameters,acoustic of sample changes in the record freezing process; 3) after S ﹠ W solution freezes fully, reset the interior temperature of cryostat groove more than freezing point of solution, detect and guarantee the impermeability of autoclave and each bar pipeline, open vacuum pump then, the air in autoclave and each the bar associated line is taken out; 4) open high-pressure natural gas distribution bottle, feed methane gas in autoclave, note the amount that feeds gas by gas meter simultaneously, when reaching the force value that presets according to the test needs in the autoclave, ventilation finishes; 5) the gas hydrate sound collecting analysis module by presetting in the computer acquisition system, the beginning of observation water compound generates and timing, access time at interval arbitrarily, measure system, the variation of temperature, pressure and parameters,acoustic in the corresponding record hydrate generative process by temperature measurement system, pressure-measuring system and ultrasonic velocity respectively; 6) no longer reduce when pressure, temperature also trends towards certain value, and velocity of sound amplitude etc. also is stable at certain value, and experiment finishes, and has obtained the sediment sample that hydrate is evenly distributed.
Described sediment is a silica sand, and described aqueous solution is a brine solution.
The present invention is owing to take above technical scheme, it has the following advantages: 1, the present invention is owing to be provided with autoclave, autoclave connects a high-pressure natural gas gas distributing system, and autoclave places in the cryostat groove, the cryostat groove connects a refrigeration compressor, therefore can be by the air inflow of control gas distributing system, the sediment and the cryostat groove temperature that add in the autoclave, carry out different component gas, the different-grain diameter sediment, the measurement of hydrate acoustic properties in the sediment under the differential responses condition, the while can also be carried out the mensuration of hydrate in the solution.2, the present invention is by the generative process of gas hydrate in the simulation sediment, utilize ultrasonic velocity to measure the systematic survey gas hydrate in sediment, to generate/decomposable process in acoustics physical parameters such as the velocity of sound, amplitude, the hydrate of estimating in the sediment distributes, for the exploration and the estimation of gas hydrate resource provides physical parameter accurately.3, the present invention owing to measure gas hydrate and in sediment, generate/decomposable process in acoustic properties physical parameters such as the velocity of sound, amplitude, and the acoustics physical parameter of gas hydrate in the sediment, for the saturation degree of gas hydrate and the relation between the acoustic characteristic in the research sediment, set up correct hydrate and the acoustic characteristic model is significant, therefore, can provide necessary, acoustics physical data accurately and reliably for the exploration of gas hydrate resource and estimation.4, the present invention is owing to be provided with cryostat groove and refrigeration compressor, and autoclave places in the cryostat groove, therefore, can control experiment and carry out under the temperature of setting.5, therefore the present invention, can make the gas hydrate that generate in sediment more even owing to adopted first icing regeneration method of gas hydrate, and the velocity of sound experimental data of measurement is more accurate.Apparatus of the present invention are skillfully constructed, method is simple to operation, not only can measure the acoustic properties of gas hydrate, and can measure the acoustic properties of gas hydrate in the sediment, and it is accurate to measure numerical value, can be widely used in the exploration and stock number estimation process of gas hydrate resource.
Description of drawings
Fig. 1 is a measurement mechanism structural representation of the present invention
Fig. 2 is the structural representation of reactor in the measurement mechanism of the present invention
Fig. 3 is that ultrasonic velocity of the present invention is measured the system works principle schematic
Fig. 4 is a gas hydrate velocity of sound collection analysis module working interface synoptic diagram of the present invention
Fig. 5 is that temperature in the specific embodiment of the invention, pressure change synoptic diagram with the reaction time
Fig. 6 is that the velocity of sound changes synoptic diagram with the reaction time in the specific embodiment of the invention
Embodiment
Below in conjunction with drawings and Examples the present invention is described in detail.
As shown in Figure 1 and Figure 2, measurement mechanism of the present invention comprises that one can fill the autoclave 1 of test medium in it, autoclave 1 connects a high-pressure natural gas gas distributing system 2, a temperature measurement system 3, a pressure-measuring system 4 and a ultrasonic velocity respectively and measures system 5, autoclave 1 is arranged in the cryostat groove 6, and cryostat groove 6 connects a refrigeration compressor 7.
Autoclave of the present invention 1 top is provided with a kettle cover, and sliding on the kettle cover is inserted with one handle slide bar 11, and autoclave 1 bottom is provided with a bracing frame 12.The still wall top of autoclave 1 is provided with air intake opening 13 on, and the bottom is provided with an air intake opening 14 and a freeing port 15, and freeing port 15 is connected to cryostat groove 6 outsides by its discharge pipe line that is provided with stop valve 16.
High-pressure natural gas gas distributing system 2 of the present invention comprises a high-pressure natural gas distribution bottle 21, the output pipe of high-pressure natural gas distribution bottle 21 is connected a gas meter 24 and a six-way valve 25 by a stop valve 22 with a reduction valve 23 successively side by side, also is provided with a stop valve 26 between six-way valve 25 and the output pipe.The output terminal of gas meter 24 connects six-way valve 25 by a stop valve.Six-way valve 25 has three output terminals, wherein an output terminal connects a vacuum pump 27 by a stop valve, one output terminal connects atmosphere by a stop valve 28, also have an output terminal to connect two stop valves side by side, wherein the output terminal of a stop valve is connected to the last air intake opening 13 of autoclave 1, and the output terminal of another stop valve is connected to the following air intake opening 14 of autoclave 1.
Temperature measurement system 3 of the present invention comprises the thermopair 31 that is arranged on autoclave 1 inwall, and the output terminal of thermopair 31 connects a temperature indicator 33 by a temperature sensor 32.
Pressure-measuring system 4 of the present invention comprises the pressure transducer 41 that is arranged on autoclave 1 inner roof wall, and the output terminal of pressure transducer 41 connects a pressure display instrument 42.
Shown in Fig. 1～3, ultrasonic velocity of the present invention is measured system 5 and is comprised a ultrasonic probe 51 that is separately positioned on autoclave 1 inner handle slide bar, 11 bottoms and autoclave 1 inner bottom part, wherein the ultrasonic probe 51 of handle slide bar 11 bottoms can move up and down with handle slide bar 11, so that regulate distance between upper and lower two ultrasonic probes 51, adapt to the measurement of different length sample.Two ultrasonic probes 51 are connected with an acoustic-electrical transducer 52 respectively, wherein an acoustic-electrical transducer 52 is wired to the transmitting terminal that instrument 53 is accepted in ultrasonic signal emission, another acoustic-electrical transducer 52 is wired to the receiving end that instrument 53 is accepted in the ultrasonic signal emission, the ultrasonic signal emission is accepted instrument 53 and is connected an oscillograph 54 by lead, the treated amplification of the signal that receives back shows on oscillograph 54, the output terminal of oscillograph 54 connects a computer acquisition system 55 by lead, presets gas hydrate sound collecting analysis module in the computer acquisition system 55.
Gas hydrate sound collecting analysis module can be gathered the waveform signal on the oscillograph 54, store, analyze, and calculates parameters,acoustic.The computer acquisition system 55 that ultrasonic velocity is measured in the system 5 is used for the parameters,acoustic that image data is also analyzed, preserved (temperature, pressure, water saturation etc.) sediment hydrate sample under certain simulated experiment condition.Gas hydrate sound collecting analysis module can be finished the acquisition process of data, can well finish the work of automatic identification and guide sound electric transducer 52 again.
In the foregoing description, autoclave 1 is processed by stainless steel material, and it can withstand voltage 32MPa, and the volume of autoclave 1 is 2L, and internal diameter is 130mm, and significant height is 150mm.At the osculum 15 of autoclave and the aperture of following air admission hole 14 is φ 3mm, and the aperture of last air admission hole 13 is φ 6mm.Test medium in the autoclave 1 can be solution, also can specifically select according to experiment condition for the sediment of different-grain diameter.
In the foregoing description, cryostat groove 6 adopts HA-5 type low temperature cryostat groove, and power is 4.5Kw, and lowest refrigerating temperature is-253.2K.The effect of cryostat groove 6 and connected refrigeration compressor 7 mainly is that the control experiment is carried out under the temperature of setting.
In the foregoing description, high-pressure natural gas gas distributing system 2 is mainly used in the needed gas of supply response.Wherein, but gas meter 24 accurate recordings enter the gas flow in the autoclave 1, so that calculate the gas flow that reaction is consumed.
In the foregoing description, the ultrasonic probe 51 that ultrasonic velocity is measured in the system 5 is the P ripple probe of 1MHz for dominant frequency.It is 400V that the voltage that instrument 53 is applied to acoustic-electrical transducer 52 is accepted in ultrasonic signal emission, and pulsed frequency is 1MHz.The frequency acquisition of oscillograph 54 is 100MHz.
Because can gas hydrate evenly distribute in sediment is the key of measuring, therefore, for gas hydrate are evenly distributed in sediment, the present invention has adopted elder generation that sediment is freezed the generation method of gas hydrate of ventilating again, the hydrate that the method generates in sediment is more even, the velocity of sound experimental data of measuring is more accurate, and it may further comprise the steps:
1) sediment and aqueous solution are packed into after evenly in the autoclave 1 that cleans up, install kettle cover, autoclave 1 is put into cryostat groove 6, connect high-pressure natural gas gas distributing system 2, temperature measurement system 3, pressure-measuring system 4 and ultrasonic velocity and measure system 5, adjusting handle handle 11 makes two ultrasonic probes 51 reach suitable distance, is generally 0～60mm.
2) open refrigeration compressor 7, make and reach in the cryostat groove 6 and remain on below the freezing point of solution temperature, S ﹠ W solution is frozen earlier, instrument 53 and oscillograph 54 are accepted in the ultrasonic signal emission of opening simultaneously in the ultrasonic velocity mensuration system 5, and the gas hydrate sound collecting analysis module by presetting in the computer acquisition system 55, the variation of the parameters,acoustic of sample in the record freezing process.
3) after S ﹠ W solution freezes fully, reset the temperature in the cryostat groove 6, reach more than the freezing point of solution temperature, connect under the pipeline impermeability good premise at autoclave 1 and each bar, open vacuum pump 27, by vacuum pump 27 air in autoclave 1 and each bar connection pipeline is taken out, deaeration is to the interference of experiment.
4) open high-pressure natural gas distribution bottle 21, feed rock gas in autoclave 1, note the amount that feeds gas by gas meter 24 simultaneously, when reaching the pressure of setting in the autoclave 1, be generally about 12MPa, ventilation finishes.
5) the gas hydrate sound collecting analysis module by presetting in the computer acquisition system 55, the beginning of observation water compound generates and timing, measure the variation of temperature, pressure and parameters,acoustic in system's 5 corresponding record hydrate generative processes respectively by temperature measurement system 3, pressure-measuring system 4 and ultrasonic velocity at interval access time arbitrarily.When hydrate constantly generated, because spent gas, pressure constantly reduced, and the velocity of sound and amplitude constantly increase.After reaction finished, pressure no longer reduced, and temperature also trends towards certain value, and velocity of sound amplitude etc. also is stable at certain value.
6) experiment finishes, and has obtained the sediment sample that hydrate is evenly distributed, and has also noted the hydrate temperature in the generative process, pressure and acoustics variations of physical parameters in sediment simultaneously.
The hydrate sample that utilizes above-mentioned steps to generate can also be measured temperature, pressure and acoustics variations of physical parameters in the decomposition of hydrate process.
In the foregoing description, the sediment volume of voids in the step 1) can mix according to arbitrary proportion with the aqueous solution volume; In the step 5), the force value in the autoclave can be measured the variation of temperature, pressure and parameters,acoustic in the hydrate generative process under any force value according to the test needs.
At said method, enumerate a specific embodiment below:
1) earlier autoclave 1 inside is cleaned up with deionized water, guarantee to dry up with hair-dryer then without any impurity.
2) thermopair 31 is installed on the wall of autoclave 1, is convenient to measure in the sediment and generates variation of temperature in the gas hydrate process.
3) with certain order number through cleaning up and the dry silica sand of crossing mixes according to a certain percentage with brine solution, the autoclave 1 of packing into together after mixing, and, then kettle cover being installed on the autoclave 1 with the sediment pressing.
4) the electricity consumption travelling block places cryostat groove 6 with autoclave 1, measures system 5 with high-pressure natural gas gas distributing system 2, temperature measurement system 3, pressure-measuring system 4 and ultrasonic velocity respectively then and connects.By regulating the handle 11 of autoclave 1, two ultrasonic probes 51 are adjusted to a suitable distance, make the distance of detection sample of each experiment close, to have comparability as far as possible.
5) temperature with cryostat groove 6 is set at 268.2K, start refrigeration compressor 7 then and begin cooling, make sediment icing fully, open simultaneously ultrasonic signal emission accept in instrument 53, oscillograph 54 and the computer acquisition system 55 in the gas hydrate sound collecting analysis module that presets, the acoustic properties of sediment sample changes in the record freezing process.
6) treat that sediment freezes fully after, feed the impermeability of the methane gas checking experiment device of 3.0MPa, under the impermeability good premise, earlier methane gas is discharged, with vacuum pump 27 autoclave 1 and air inlet pipeline are vacuumized 20min again, again with feeding 1.0MPa methane gas displacement three times.
7) guarantee that the impermeability of device is good after, open high-pressure natural gas distribution bottle 21, and the stop valve between high-pressure natural gas distribution bottle 21 and the gas meter 24, between flowmeter body and the six-way valve 25, between six-way valve 25 and the autoclave 1, slowly to autoclave 1 air inlet to 12.0MPa, and measure the amount of air inlets by gas meter 24, air inlet finishes and closes the stop valve at above-mentioned three places.
8) temperature that resets cryostat groove 6 is 272.2K, pick up counting simultaneously, the variation of record temperature, pressure is gathered waveform signal and preservation by gas hydrate sound collecting analysis module, the velocity of sound amplitude that extracts waveform signal is for analyzing, and the software work interface as shown in Figure 4.
9) be tending towards certain value when temperature, pressure, after waveform signal no longer changed, experiment was that decidable has reacted end;
In the hydrate generative process temperature, pressure over time, as shown in Figure 5, the velocity of sound is over time as shown in Figure 6 in the hydrate generative process.
For the sediment of different-grain diameter, different initial pressures, the sediment of different water cut saturation degree all can be according to this step repeated experiments, to record hydrate acoustics physical parameter in the sediment under the different condition.
Adopt the inventive method, record under the different tests condition, shown in the acoustics physical parameter following table of sample:
The various embodiments described above only are used to illustrate the present invention, and wherein the structure of each parts, connected mode etc. all can change to some extent, and every equivalents of carrying out on the basis of technical solution of the present invention and improvement all should not got rid of outside protection scope of the present invention.
Claims (9)
1. simulate the device that gas hydrate generated and measured its physical parameter for one kind, it is characterized in that: it comprises its interior autoclave of filling test medium, described autoclave connects a high-pressure natural gas gas distributing system, a temperature measurement system, a pressure-measuring system and a ultrasonic velocity measuring system respectively, described autoclave is arranged in the cryostat groove, and described cryostat groove connects a refrigeration compressor;
Described autoclave top is provided with a kettle cover, and sliding on the described kettle cover is inserted with the one handle slide bar;
Described ultrasonic velocity measuring system comprises a ultrasonic probe that is separately positioned on described autoclave interior described handle slide bar bottom and described autoclave inner bottom part, two described ultrasonic probes are connected with an acoustic-electrical transducer respectively, wherein a described acoustic-electrical transducer is wired to the transmitting terminal that instrument is accepted in ultrasonic signal emission, another described acoustic-electrical transducer is wired to the receiving end that instrument is accepted in described ultrasonic signal emission, described ultrasonic signal emission is accepted instrument and is connected an oscillograph by lead, described oscillographic output terminal connects a computer acquisition system by lead, presets gas hydrate sound collecting analysis module in the described computer acquisition system.
2. a kind of device that gas hydrate generated and measured its physical parameter of simulating as claimed in claim 1, it is characterized in that: the still wall top of described autoclave is provided with air intake opening on, the bottom is provided with an air intake opening and a freeing port, and described freeing port is connected to described cryostat groove outside by its discharge pipe line that is provided with stop valve.
3. a kind of device that gas hydrate generated and measured its physical parameter of simulating as claimed in claim 1, it is characterized in that: described high-pressure natural gas gas distributing system comprises a high-pressure natural gas distribution bottle, the output pipe of described high-pressure natural gas distribution bottle is connected a gas meter and a six-way valve by a stop valve with a reduction valve successively side by side, also is provided with a stop valve between described six-way valve and the described output pipe; The output terminal of described gas meter connects described six-way valve by a stop valve; Described six-way valve has three output terminals, wherein an output terminal connects a vacuum pump by a stop valve, one output terminal connects atmosphere by a stop valve, also have an output terminal to connect two stop valves side by side, wherein the output terminal of a described stop valve is connected to the described air intake opening of going up of described autoclave, and the output terminal of another described stop valve is connected to the described gas port of described autoclave.
4. a kind of device that gas hydrate generated and measured its physical parameter of simulating as claimed in claim 2, it is characterized in that: described high-pressure natural gas gas distributing system comprises a high-pressure natural gas distribution bottle, the output pipe of described high-pressure natural gas distribution bottle is connected a gas meter and a six-way valve by a stop valve with a reduction valve successively side by side, also is provided with a stop valve between described six-way valve and the described output pipe; The output terminal of described gas meter connects described six-way valve by a stop valve; Described six-way valve has three output terminals, wherein an output terminal connects a vacuum pump by a stop valve, one output terminal connects atmosphere by a stop valve, also have an output terminal to connect two stop valves side by side, wherein the output terminal of a described stop valve is connected to the described air intake opening of going up of described autoclave, and the output terminal of another described stop valve is connected to the described gas port of described autoclave.
5. as claim 1 or 2 or 3 or 4 described a kind of devices that gas hydrate generated and measured its physical parameter of simulating, it is characterized in that: described temperature measurement system comprises the thermopair that is arranged on the described autoclave inwall, and the output terminal of described thermopair connects a temperature indicator by a temperature sensor.
6. as claim 1 or 2 or 3 or 4 described a kind of devices that gas hydrate generated and measured its physical parameter of simulating, it is characterized in that: described pressure-measuring system comprises the pressure transducer that is arranged on the described autoclave inner roof wall, and the output terminal of described pressure transducer connects a pressure display instrument.
7. a kind of device that gas hydrate generated and measured its physical parameter of simulating as claimed in claim 5, it is characterized in that: described pressure-measuring system comprises the pressure transducer that is arranged on the described autoclave inner roof wall, and the output terminal of described pressure transducer connects a pressure display instrument.
8. simulation gas hydrate as claim 1～7 device as described in each generate and measure the method for its physical parameter, and it may further comprise the steps:
1) as required, according to arbitrary proportion with sediment and aqueous solution evenly after, pack in the autoclave, install kettle cover, autoclave is put into the cryostat groove, connect high-pressure natural gas gas distributing system, temperature measurement system, pressure-measuring system and ultrasonic velocity and measure system, the adjusting handle slide bar makes between two ultrasonic probes and keeps certain distance, and distance range is 0～60mm;
2) open refrigeration compressor, make and reach in the cryostat groove and keep design temperature below the freezing point of solution temperature, instrument and oscillograph are accepted in the ultrasonic signal emission of opening simultaneously in the ultrasonic velocity mensuration system, by the gas hydrate sound collecting analysis module that presets in the computer acquisition system, the parameters,acoustic of sample changes in the record freezing process;
3) after S ﹠ W solution freezes fully, reset the interior temperature of cryostat groove more than the freezing point of solution temperature, detect and guarantee the impermeability of autoclave and each bar pipeline, open vacuum pump then, the air in autoclave and each the bar associated line is taken out;
4) open high-pressure natural gas distribution bottle, feed methane gas in autoclave, note the amount that feeds gas by gas meter simultaneously, when reaching the force value that presets according to the test needs in the autoclave, ventilation finishes;
5) the gas hydrate sound collecting analysis module by presetting in the computer acquisition system, the beginning of observation water compound generates and timing, access time at interval arbitrarily, measure system, the variation of temperature, pressure and parameters,acoustic in the corresponding record hydrate generative process by temperature measurement system, pressure-measuring system and ultrasonic velocity respectively;
6) no longer reduce when pressure, temperature trends towards certain value, and velocity of sound amplitude also is stable at certain value, and experiment finishes, and has obtained the sediment sample that hydrate is evenly distributed.
9. a kind of method that gas hydrate generated and measured its physical parameter of simulating as claimed in claim 8, it is characterized in that: described sediment is a silica sand, described aqueous solution is a brine solution.
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