CN103424532B - Containing the experimental provision of hydrate sediment velocities cross-section structure characteristic research - Google Patents
Containing the experimental provision of hydrate sediment velocities cross-section structure characteristic research Download PDFInfo
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- CN103424532B CN103424532B CN201210160156.7A CN201210160156A CN103424532B CN 103424532 B CN103424532 B CN 103424532B CN 201210160156 A CN201210160156 A CN 201210160156A CN 103424532 B CN103424532 B CN 103424532B
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Abstract
The present invention relates to a kind of experimental provision, particularly relate to a kind of experimental provision containing hydrate sediment velocities section.Experimental provision containing hydrate sediment velocities cross-section structure characteristic research of the present invention, comprise control pressurer system, refrigeration system, detection system, autoclave, computer acquisition system, control pressurer system is communicated with autoclave, autoclave is arranged in refrigeration systems, and detection system to be arranged in autoclave and to be connected with computer acquisition system.Flexure element technology and time domain reflection technology (TDR) are expanded by this work, the Detection Techniques containing hydrate sediment p-and s-wave velocity cross-section structure are developed on the one hand, on the other hand utilize TDR technology to detect containing the water cut of hydrate sediment different layers position and hydrate concentration on this basis both to be combined, can containing the hydrate concentration of the sedimental velocity profile structure of hydrate and its respective layer position in Obtaining Accurate hydrate generation/decomposable process.
Description
Technical field
The present invention relates to a kind of experimental provision, particularly relate to a kind of experimental provision containing hydrate sediment velocities section.
Background technology
Gas hydrate, compared with pore fluid, have higher elastic modulus, therefore, show as high speed abnormal containing hydrate deposit in earthquake and acoustic logging section.The generation Sum decomposition of hydrate how to affect sedimentary deposit velocity variations? what kind of has contact between sedimental layered velocity and the Content and distribution of hydrate? it is the basis that geophysical probing technique is applied in hydrate exploration and resource evaluation.Interval velocity (intervalvelocity) refers to the speed of seismic wave propagation in laminar formation, and generally obtained by seismic prospecting or acoustic logging, gathered is P-wave interval velocity more, does not have hemihydrate content corresponding with it and the data of distribution.How in laboratory, to obtain hydrate concentration data corresponding with it containing the vertical S-wave interval velocity characteristic sum of hydrate deposit in hydrate generation/decomposable process by simulated experiment, depend primarily on the Design and manufacture of experimental provision.
At present, the research of hemihydrate content and the velocity of sound in simple layer in one-dimensional model is mostly concentrated on both at home and abroad about the experimental study containing hydrate sediment acoustics characteristic, as the Resonant Column device of Southampton University of Southampton and the geophysical modeling experimental provision of Qingdao Inst of Marine Geology, the hydrate concentration of one dimension and the experimental data of p-and s-wave velocity relation can be obtained, achieve good effect.But have random distribution characteristic because hydrate is formed in sediment, the superposition of simple layer position research is difficult to illustrate the impact of hydrate on sediment velocities cross-section structure.
Summary of the invention
Technique effect of the present invention can overcome above-mentioned defect, there is provided a kind of experimental provision containing hydrate sediment velocities cross-section structure characteristic research, it can containing the hydrate concentration of the sedimental velocity profile structure of hydrate and its respective layer position in Obtaining Accurate hydrate generation/decomposable process.
For achieving the above object, the present invention adopts following technical scheme: it comprises control pressurer system, refrigeration system, detection system, autoclave, computer acquisition system, control pressurer system is communicated with autoclave, autoclave is arranged in refrigeration systems, and detection system to be arranged in autoclave and to be connected with computer acquisition system.
Control pressurer system comprises gas cylinder, and gas cylinder is communicated with autoclave by pressure generating equipment, valve, major control and the gaseous tension of monitoring in autoclave.
Autoclave comprises kettle, mainly sediment sample is housed in kettle, can carry out hydrate generation Sum decomposition wherein and tests and detect each parameter in experimentation.
Detection system comprises flexure element transducer, Time Domain Reflectometry probe, pressure transducer, flexure element transducer, Time Domain Reflectometry probe are connected with computer acquisition system respectively by Data Acquisition Card, one end of pressure transducer is communicated with kettle, and the other end is connected with computer acquisition system.It is four right that Time Domain Reflectometry probe is arranged, and often pair of Time Domain Reflectometry probe is arranged on the different height of kettle; Often pair of corresponding flexure element transducer of Time Domain Reflectometry probe.Adopt and switch the collection that radiation pattern carries out flexure element detection multicast, obtain the interval velocity of every one deck position.Corresponding with often pair of flexure element transducer, arrange four pairs of double stick type Time Domain Reflectometry probes, the often pair of Time Domain Reflectometry probe detects the hydrate concentration of every layer, and Time Domain Reflectometry detection is completed by the TDR100 instrument of Campbell company.
Detection system also comprises temperature sensor, and temperature sensor is connected with computer acquisition system.8 temperature sensors (Pt100 probe) are installed in four layer positions of sample interior, monitor temperature altogether.
Refrigeration system comprises water bath, refrigerating plant, and water bath is communicated with refrigerating plant, and kettle is arranged in water bath, for controlling the temperature of autoclave.
Wherein autoclave is most crucial parts, four layer positions arranges Novel bending unit transducer, Time Domain Reflectometry probe and temperature probe within it from top to bottom, through special design and processing, each parameter can be measured simultaneously.
Flexure element technology and time domain reflection technology (TDR) are expanded by this work, the Detection Techniques containing hydrate sediment p-and s-wave velocity cross-section structure are developed on the one hand, another aspect has utilized TDR technology to detect containing the water cut of hydrate sediment different layers position and hydrate concentration, on this basis both are combined, can containing the hydrate concentration of the sedimental velocity profile structure of hydrate and its respective layer position in Obtaining Accurate hydrate generation/decomposable process.Not only there is important academic significance, have more the practical significance of promising China's natural gas hydrate exploration and resource evaluation service.
Accompanying drawing explanation
Fig. 1 is inner structure schematic diagram of the present invention.
In figure: 1. gas cylinder; 2. valve; 3. pressure generating equipment; 4. pressure transducer; 5. Data Acquisition Card; 6. computer acquisition system; 7. refrigerating plant; 8. water bath; 9. temperature sensor; 10. Time Domain Reflectometry probe; 11. flexure element transducers; 12. kettlies.
Embodiment
As shown in Figure 1, experimental provision containing the research of hydrate sediment velocities cross-section structure of the present invention comprises control pressurer system, refrigeration system, detection system, autoclave, computer acquisition system, control pressurer system is communicated with autoclave, autoclave is arranged in refrigeration systems, and detection system to be arranged in autoclave and to be connected with computer acquisition system.
Control pressurer system comprises gas cylinder 1, and gas cylinder 1 is communicated with autoclave by pressure generating equipment 3, valve 2.Autoclave comprises kettle 12.Detection system comprises flexure element transducer 11, Time Domain Reflectometry probe 10, pressure transducer 4, flexure element transducer 11, Time Domain Reflectometry probe 10 are connected with computer acquisition system 6 respectively by Data Acquisition Card 5, one end of pressure transducer 4 is communicated with kettle 12, and the other end is connected with computer acquisition system 6.It is four right that Time Domain Reflectometry probe 10 is arranged, and often pair of Time Domain Reflectometry probe 10 is arranged on the different height of kettle; Often pair of corresponding flexure element transducer 12 of Time Domain Reflectometry probe 10.Detection system also comprises temperature sensor 9, and temperature sensor 9 is connected with computer acquisition system 6.Refrigeration system comprises water bath 8, refrigerating plant 7, and water bath 8 is communicated with refrigerating plant 7, and kettle 12 is arranged in water bath 8.
Through designing especially between autoclave wall and flexure element transducer 12, Time Domain Reflectometry probe 10, make to insulate between two kinds of sniffers and still wall, high pressure sealing.Sediment puts into still and flexure element transducer 12 close contact, and convenient acquisition indulges the first S-wave arrival; Double stick type Time Domain Reflectometry probe 10 is in same level with the center of often pair of flexure element transducer 12, and often pair of TDR probe can detect water cut and the hydrate concentration of every one deck position respectively.Interference between flexure element transducer 12, the mode adopting switching to gather at a certain time interval (as 10 seconds) gathers the sound wave of each layer of position respectively; In like manner, Time Domain Reflectometry probe 10 also adopts the mode switching collection to carry out.The upper cover of autoclave connects gas pipeline, by threeway Bonding pressure sensor 4, and pressure changing in Real-Time Monitoring still.The lower cover of autoclave is fixed wtih eight temperature sensor 9(Pt100 temperature probes), the temperature variations of the inner each layer of position of monitoring sediment.Acoustic signals, TDR detectable signal directly enter computer acquisition system 6 through Data Acquisition Card 5 and carry out data processing.The reactor containing sediment sample is put into water bath 8, and liquid coolant is ethanolic solution, adopts air cooling system refrigeration.Apparatus of the present invention detect while achieving acoustic profile structure and layering hydrate concentration two kinds of advanced technologies, have greatly expanded the application of acoustic technique in hydrate geophysical survey and resource evaluation.
When deployed, its concrete steps are: (1) puts into autoclave sediment.(2) various sniffer is installed.(3) after whole system vacuumizes, add the gas of certain pressure, place and gas was dissolved in water in about 24 hours.(4) start cooling system, hydrate is generated.(5) detect, record various parameter.
This experimental provision is easy to operate, safety.In real work, acoustic sounding, Time Domain Reflectometry (TDR) detection and temperature, pressure can be carried out as required detect simultaneously, wherein a kind of technology also can be selected respectively to detect.
Claims (4)
1. the experimental provision containing hydrate sediment velocities cross-section structure characteristic research, it is characterized in that, comprise control pressurer system, refrigeration system, detection system, autoclave, computer acquisition system, control pressurer system is communicated with autoclave, autoclave is arranged in refrigeration systems, detection system to be arranged in autoclave and to be connected with computer acquisition system, autoclave comprises kettle (12), detection system comprises flexure element transducer (11), Time Domain Reflectometry probe (10), pressure transducer (4), it is four right that Time Domain Reflectometry probe (10) is arranged, often pair of Time Domain Reflectometry probe (10) is arranged on the different height of kettle, often pair of corresponding pair of curved unit's transducer (11) of Time Domain Reflectometry probe (10), flexure element transducer (11), Time Domain Reflectometry probe (10) is connected with computer acquisition system (6) respectively by Data Acquisition Card (5), one end of pressure transducer (4) is communicated with kettle (12), the other end is connected with computer acquisition system (6).
2. the experimental provision containing hydrate sediment velocities cross-section structure characteristic research according to claim 1, it is characterized in that, control pressurer system comprises gas cylinder (1), and gas cylinder (1) is communicated with autoclave by pressure generating equipment (3), valve (2).
3. the experimental provision containing hydrate sediment velocities cross-section structure characteristic research according to claim 1, it is characterized in that, detection system also comprises temperature sensor (9), and temperature sensor (9) is connected with computer acquisition system (6).
4. the experimental provision containing hydrate sediment velocities cross-section structure characteristic research according to claim 1, it is characterized in that, refrigeration system comprises water bath (8), refrigerating plant (7), water bath (8) is communicated with refrigerating plant (7), and kettle (12) is arranged in water bath (8).
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| 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 |
| CN110618255B (en) * | 2019-10-24 | 2021-10-08 | 中国船舶科学研究中心（中国船舶重工集团公司第七0二研究所） | Confining pressure test device for simulating stratum accumulation, installation method and test method |
| CN113281825B (en) * | 2020-02-20 | 2024-06-28 | 中国石油天然气集团有限公司 | Rock physical model construction method and device |
| CN114414456B (en) * | 2022-01-17 | 2024-03-12 | 黑龙江科技大学 | Method and device for calculating saturation of gas hydrate |
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| CN102262126A (en) * | 2010-05-27 | 2011-11-30 | 中国石油天然气股份有限公司 | Method for measuring water saturation in two-dimensional rock model |
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| JP2005331288A (en) * | 2004-05-18 | 2005-12-02 | Nippon Chiken Kk | Display method of soil constitution based on cone penetration test |
| CN1317557C (en) * | 2004-11-30 | 2007-05-23 | 青岛海洋地质研究所 | Simulating device for geophyscical gas hydrate |
| JP4559898B2 (en) * | 2005-03-31 | 2010-10-13 | 独立行政法人産業技術総合研究所 | Gas hydrate production equipment |
| CN201508357U (en) * | 2009-10-23 | 2010-06-16 | 中国科学院武汉岩土力学研究所 | Phase equilibrium testing device for gas hydrate in submarine sediment |
| CN101699258A (en) * | 2009-10-23 | 2010-04-28 | 中国科学院力学研究所 | Device and method thereof for testing synthesis and decomposition parameters of hydrate sediment |
| CN201661295U (en) * | 2010-03-05 | 2010-12-01 | 中国石油大学(华东) | Gas hydrate reservoir physical property measuring device |
| CN102052065A (en) * | 2010-07-01 | 2011-05-11 | 青岛海洋地质研究所 | Simulation exploiting experiment device for natural gas hydrate |
| CN201749101U (en) * | 2010-07-01 | 2011-02-16 | 青岛海洋地质研究所 | Hydrate formation dynamic simulation experiment device |
| CN102042948A (en) * | 2010-07-01 | 2011-05-04 | 青岛海洋地质研究所 | Device for testing hydrate acoustic properties |
| CN101936833B (en) * | 2010-07-21 | 2012-07-18 | 中国海洋石油总公司 | Device and method for simulating generation of gas hydrate and measuring physical property parameters thereof |
| CN202676695U (en) * | 2012-05-22 | 2013-01-16 | 青岛海洋地质研究所 | Experimental device for velocity profile structural property research of sediment containing hydrates |
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| CN102262126A (en) * | 2010-05-27 | 2011-11-30 | 中国石油天然气股份有限公司 | Method for measuring water saturation in two-dimensional rock model |
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