CN103424182A - Acoustic response characteristic simulation experiment set for seabed gas transfer and aquo-complex generation - Google Patents
Acoustic response characteristic simulation experiment set for seabed gas transfer and aquo-complex generation Download PDFInfo
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- CN103424182A CN103424182A CN2012101604156A CN201210160415A CN103424182A CN 103424182 A CN103424182 A CN 103424182A CN 2012101604156 A CN2012101604156 A CN 2012101604156A CN 201210160415 A CN201210160415 A CN 201210160415A CN 103424182 A CN103424182 A CN 103424182A
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Abstract
The invention relates to an experiment set, in particular to an acoustic response characteristic simulation experiment set. The acoustic response characteristic simulation experiment set for seabed gas transfer and aquo-complex generation is characterized by comprising a pressure control system, a temperature control system, a detection system, a high-pressure reactor and a computer acquisition system. The pressure control system is communicated with the high-pressure reactor, the high-pressure reactor is arranged in the temperature control system, and the detection system is arranged in the high-pressure reactor and connected with the computer acquisition system. Combined with the bender element detection technology and time domain reflectometry (TDR), the acoustic response characteristic simulation experiment set can monitor change situations of acoustic parameters and aquo-complex saturability in the process of gas transfer and aquo-complex generation in real time, obtained experiment results are closer to seabed environment, and acoustic response characteristic research on generation of aquo-complex with different gas fluxes can be achieved.
Description
Technical field
The present invention relates to a kind of experimental provision, relate in particular to a kind of acoustic response characteristics analogue experiment installation.
Background technology
At present, according to the difference of experimental provision, hydrate at least can form in four kinds of modes in sediment, and be about to rock gas and pass into following several sediment: (1) is containing the fractional saturation water sediment; (2) containing the saturation water sediment; (3) containing the ice pellets sediment; (4) mode with solution gas forms hydrate in sediment.The hydrate that these four kinds of modes form has all been simulated the Natural growth process of hydrate to a certain extent, but difference to some extent.For example, for first three kind mode, be mostly gas on top, sediment is in bottom, can not truly reflect gas with certain flow the process from the seabed Upward Migration.And, the hydrate that different hydrate generation type forms has Different Effects to sedimental acoustic response characteristics, sufficient methane gas passes into the cementing sedimentary particle of hydrate possibility of the full water sediment formation of coarse grain, thereby larger on the acoustic characteristic impact of deposition medium; The hydrate that solution gas forms may be suspended in the sediment pore fluid, less on the impact of sediment acoustics characteristic.How to realize that gas is from bottom to top with certain flux migration, and measure p-and s-wave velocity and hydrate concentration parameter in hydrate formation, key is design and the manufacture of experimental provision.
Under the above-mentioned four kinds of generating modes of the most research at present domestic and international laboratory, hydrate is to sedimental acoustic response characteristics, as gas hydrate and the sediment lab setup GHASTLI (Gas Hydrate And Sediment Test Laboratory Instrument) of US Geological Survey, studied the acoustic response characteristics that the first two mode forms hydrate; The Resonant Column device of Southampton University of Southampton, studied the acoustic response that rear three kinds of modes form hydrate.But, due to the complicacy of hydrate reservoir, different gas methods of supplying may produce deviation to experimental result.
Summary of the invention
Technique effect of the present invention can overcome above-mentioned defect, the acoustic response characteristics analogue experiment installation that provides a kind of seabed gas entrainment and hydrate to form, and it can realize the acoustic response characteristics research that gas with various flux hydrate forms.
For achieving the above object, the present invention adopts following technical scheme: it comprises control pressurer system, temperature control system, detection system, autoclave, computer acquisition system, control pressurer system is communicated with autoclave, autoclave is arranged in temperature control system, and detection system is arranged in autoclave and is connected with computer acquisition system.
Autoclave comprises kettle, is provided with upper chamber and lower chamber in kettle, between upper chamber and lower chamber, is sample chamber, is respectively equipped with micropore sintered plate between sample chamber and upper chamber and lower chamber.Micropore sintered plate work is to utilize special capillary ceramic plate and control pressurer system combination, can in device, from bottom, migrate to top by the gas with certain flux, and gas generates hydrate in migration process, and the gas that does not generate hydrate is released; Present technique is simultaneously in conjunction with flexure element Detection Techniques and time domain reflection technology (TDR), but the situation of change of parameters,acoustic and hydrate concentration in Real-Time Monitoring gas entrainment and hydrate formation.The experimental result drawn more is close to environments such as subsea, can realize the acoustic response characteristics research that gas with various flux hydrate forms.Not only there is important academic significance, have more promising China's natural gas hydrate and reconnoitre the practical significance of service.Micropore sintered plate has the function of permeable watertight, can keep sample moisture, makes gas can enter sample chamber simultaneously.
Control pressurer system comprises gas cylinder, and gas cylinder is communicated with lower chamber by the TESCOM reduced pressure controller; The TESCOM reduced pressure controller is communicated with TESCOM back pressure controller I by TESCOM back pressure controller II, and a side of TESCOM back pressure controller I is communicated with upper chamber, and opposite side is in communication with the outside.
Temperature control system adopts temperature control box, and kettle is arranged in temperature control box.Reactor is placed in temperature control box, and temperature control box is connected with a circulating water refrigeration system, by water-cooled and air-cooled in conjunction with temperature control, improves the stability of temperature control.
Detection system comprises acoustic transducer, Time Domain Reflectometry probe, pressure transducer I, pressure transducer II, acoustic transducer, Time Domain Reflectometry probe are connected with computer acquisition system by Data Acquisition Card respectively, the pressure transducer I is communicated with lower chamber, the pressure transducer II is communicated with upper chamber, and pressure transducer I, pressure transducer II connect respectively computer acquisition system.Detection system is comprised of acoustic sounding technology (can select flexure element technology or conventional ultrasound technology) and TDR technology, can carry out acoustic sounding and Time Domain Reflectometry (TDR) simultaneously and survey.Wherein acoustic sounding comprises integrated of P-wave And S, to receive transducer a pair of, adopts the high-speed data acquisition card of Canadian GaGe company, improves supersonic sounding sensitivity.TDR surveys the saturation degree that the TDR100 instrument that adopts Campbell company is determined gas hydrate in sediment.Detection system also comprises temperature sensor, and temperature sensor is connected with computer acquisition system, on sample detecting area top layer and inside, one of Pt100 thermocouple, monitor temperature respectively is installed.
Wherein pressure control unit and autoclave are most crucial parts.Pressure control unit, through special design, can make pressure reduction between upper and lower air chamber keep constant, simultaneously can high-precision flow to the lower chamber supply gas, the condition of simulated sea bottom gas Upward Migration more realistically.In autoclave, two blocks of micropore sintered plates are special processing, and can guarantee that gas passes in sample chamber, keep moisture in sample not taken away by gas simultaneously.
The accompanying drawing explanation
Fig. 1 is inner structure schematic diagram of the present invention.
In figure: 1. gas cylinder; 2. temperature control box; 3. sample chamber; 4. lower chamber; 5. pressure transducer I; 6. computer acquisition system; 7. Data Acquisition Card; 8. acoustic transducer; 9. kettle; 10. micropore sintered plate; 11. upper chamber; 12. pressure transducer II; 13.TESCOM back pressure controller I; 14. Time Domain Reflectometry probe; 15.TESCOM back pressure controller II; 16.TESCOM reduced pressure controller; 17. temperature sensor.
Embodiment
As shown in Figure 1, the acoustic response characteristics analogue experiment installation that seabed of the present invention gas entrainment and hydrate form comprises control pressurer system, temperature control system, detection system, autoclave, computer acquisition system, control pressurer system is communicated with autoclave, autoclave is arranged in temperature control system, and detection system is arranged in autoclave and is connected with computer acquisition system.
Autoclave comprises kettle 9, is provided with upper chamber 11 and lower chamber 4 in kettle 9, between upper chamber 11 and lower chamber 4, is sample chamber 3, is respectively equipped with micropore sintered plate 10 between sample chamber 3 and upper chamber 11 and lower chamber 4.Control pressurer system comprises gas cylinder 1, and gas cylinder 1 is communicated with lower chamber 4 by TESCOM reduced pressure controller 16; TESCOM reduced pressure controller 16 is communicated with TESCOM back pressure controller I 13 by TESCOM back pressure controller II 15, and a side of TESCOM back pressure controller I 13 is communicated with upper chamber 11, and opposite side is in communication with the outside.Temperature control system adopts temperature control box 2, and kettle 9 is arranged in temperature control box 2.Detection system comprises acoustic transducer 8, Time Domain Reflectometry probe 14, pressure transducer I 5, pressure transducer II 12, acoustic transducer 8, Time Domain Reflectometry probe 14 are connected with computer acquisition system 6 by Data Acquisition Card 7 respectively, pressure transducer I 5 is communicated with lower chamber 4, pressure transducer II 12 is communicated with upper chamber 11, and pressure transducer I 5, pressure transducer II 12 connect respectively computer acquisition system 6.Detection system also comprises temperature sensor 17, and temperature sensor 17 is connected with computer acquisition system 6.
The realization of lower intake method: used three cover TESCOM controllers in system, wherein, lower chamber 4 pressure have adopted TESCOM reduced pressure controller 16 to realize, upper chamber 11 pressure adopt TESCOM back pressure controller I13 to control.No matter be reduced pressure controller or back pressure controller, its control accuracy all can reach 0.1% of gamut, that is 0.03MPa.In order further to improve control accuracy, on the draft tube in reduced pressure controller downstream, separate a gas circuit, by a TESCOM back pressure controller II 15, with escape pipe, be connected, connector is positioned at the front end of TESCOM reduced pressure controller 16.After gas enters lower chamber 4, by micropore sintered plate 10 micropore Upward Migrations, to sediment, to form hydrate, do not form the further Upward Migration of gas of hydrate, be discharged from reactor.Upper and lower two blocks of micropore sintered plates 10 can make gas pass through, and have prevented again water loss.
Autoclave is placed in temperature control box 2, and after passing into gases at high pressure, the generation of hydrate and decomposition are controlled by temperature.The search coverage of autoclave is 3 middle part in sample chamber, and acoustic transducer 8 and Time Domain Reflectometry probe 14 are lateral arrangement, can be surveyed parameters,acoustic and the hydrate concentration of same layer position simultaneously.Two temperatures sensor 17 is search coverage top layer and inner temperature respectively.The acoustic sounding technology can be selected the flexure element integrated transducer of ripple in length and breadth, for measuring flusch matter sample parameters,acoustic, also can select classic flat-plate type transducer, measures the wave sound in length and breadth of consolidated sediment and learns characteristic.Acoustic signal and TDR detectable signal carry out the data processing in Data Acquisition Card 7 directly enters computer acquisition system 6.
Apparatus of the present invention have realized that this seabed plenum system that more approaches of time air inlet forms hydrate, and can obtain parameters,acoustic and hydrate concentration in experimentation simultaneously, more effectively study hydrate and form mechanism and acoustic response characteristics thereof.
When using, its concrete steps are: (1) installs various sniffers.(2) lower micropore sintered plate 10 is installed, sediment is put into to reactor, add water to make sediment just saturated, install micropore sintered plate 10, build reactor.(3) after whole system vacuumizes, add the gas of certain pressure to make upper and lower air chamber reach set pressure, standing approximately 24 hours, treat that gas dissolution is in water.(4) open TESCOM reduced pressure controller 16, close TESCOM back pressure controller II 15, with certain flow, to lower chamber, continue air feed.(5) start cooling system, hydrate is generated.(6) survey, record various parameters.
This experimental provision is easy to operate, safety.The hydrate that carries out as required lower air inlet method of supplying in real work generates experiment, and the hydrate that also can carry out other four kinds of modes mentioned above generates experiment, and carries out the detection of parameters,acoustic and hydrate concentration in experimentation simultaneously.
Claims (6)
1. the acoustic response characteristics analogue experiment installation that a seabed gas entrainment and hydrate form, it is characterized in that, comprise control pressurer system, temperature control system, detection system, autoclave, computer acquisition system, control pressurer system is communicated with autoclave, autoclave is arranged in temperature control system, and detection system is arranged in autoclave and is connected with computer acquisition system.
2. the acoustic response characteristics analogue experiment installation that seabed according to claim 1 gas entrainment and hydrate form, it is characterized in that, autoclave comprises kettle (9), be provided with upper chamber (11) and lower chamber (4) in kettle (9), be sample chamber (3) between upper chamber (11) and lower chamber (4), between sample chamber (3) and upper chamber (11) and lower chamber (4), be respectively equipped with micropore sintered plate (10).
3. the acoustic response characteristics analogue experiment installation that seabed according to claim 2 gas entrainment and hydrate form, it is characterized in that, control pressurer system comprises gas cylinder (1), and gas cylinder (1) is communicated with lower chamber (4) by TESCOM reduced pressure controller (16); TESCOM reduced pressure controller (16) is communicated with TESCOM back pressure controller I (13) by TESCOM back pressure controller II (15), and a side of TESCOM back pressure controller I (13) is communicated with upper chamber (11), and opposite side is in communication with the outside.
4. the acoustic response characteristics analogue experiment installation that seabed according to claim 2 gas entrainment and hydrate form, is characterized in that, temperature control system adopts temperature control box (2), and kettle (9) is arranged in temperature control box (2).
5. the acoustic response characteristics analogue experiment installation that seabed according to claim 2 gas entrainment and hydrate form, it is characterized in that, detection system comprises acoustic transducer (8), Time Domain Reflectometry probe (14), pressure transducer I (5), pressure transducer II (12), acoustic transducer (8), Time Domain Reflectometry probe (14) is connected with computer acquisition system (6) by Data Acquisition Card (7) respectively, pressure transducer I (5) is communicated with lower chamber (4), pressure transducer II (12) is communicated with upper chamber (11), pressure transducer I (5), pressure transducer II (12) connects respectively computer acquisition system (6).
6. the acoustic response characteristics analogue experiment installation that seabed according to claim 5 gas entrainment and hydrate form is characterized in that detection system also comprises temperature sensor (17), and temperature sensor (17) is connected with computer acquisition system (6).
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Cited By (7)
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| CN105334547A (en) * | 2015-09-23 | 2016-02-17 | 中国石油大学(华东) | Simulated experiment testing system of gas hydrate in porous medium |
| CN105334546A (en) * | 2015-09-23 | 2016-02-17 | 中国石油大学(华东) | Simulated experiment testing method of gas hydrate in porous medium |
| WO2017050142A1 (en) * | 2015-09-23 | 2017-03-30 | 中国石油大学(华东) | Simulation experiment test system and test method for gas hydrates in porous medium |
| CN106556687A (en) * | 2016-11-21 | 2017-04-05 | 中国石油大学(华东) | Weak cementing non-diagenesis hydrate acoustics and saturation degree synchronous testing device and method |
| CN106814166A (en) * | 2017-02-28 | 2017-06-09 | 中国地质大学（武汉） | Evaluate the experimental provision and method of gas hydrate synthesis and Assembling Behavior in deepwater drilling |
| CN109982227A (en) * | 2017-12-27 | 2019-07-05 | 声博科技股份有限公司 | Measure the method and system of acoustic transducer optimal drive signal |
| CN113391050A (en) * | 2021-06-28 | 2021-09-14 | 西南石油大学 | Experimental device and method for layered simulation of hydrate accumulation process |
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| CN106556687A (en) * | 2016-11-21 | 2017-04-05 | 中国石油大学(华东) | Weak cementing non-diagenesis hydrate acoustics and saturation degree synchronous testing device and method |
| CN106814166A (en) * | 2017-02-28 | 2017-06-09 | 中国地质大学（武汉） | Evaluate the experimental provision and method of gas hydrate synthesis and Assembling Behavior in deepwater drilling |
| CN106814166B (en) * | 2017-02-28 | 2019-04-02 | 中国地质大学（武汉） | Evaluate the experimental provision and method of gas hydrate synthesis and Assembling Behavior in deepwater drilling |
| CN109982227A (en) * | 2017-12-27 | 2019-07-05 | 声博科技股份有限公司 | Measure the method and system of acoustic transducer optimal drive signal |
| CN113391050A (en) * | 2021-06-28 | 2021-09-14 | 西南石油大学 | Experimental device and method for layered simulation of hydrate accumulation process |
| CN113391050B (en) * | 2021-06-28 | 2023-12-12 | 西南石油大学 | Experimental device and method for layering simulation of hydrate formation process |
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