CN103424414A - CT in-situ detection device for microcosmic occurrence of hydrates in deposits - Google Patents

CT in-situ detection device for microcosmic occurrence of hydrates in deposits Download PDF

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Publication number
CN103424414A
CN103424414A CN2012101602593A CN201210160259A CN103424414A CN 103424414 A CN103424414 A CN 103424414A CN 2012101602593 A CN2012101602593 A CN 2012101602593A CN 201210160259 A CN201210160259 A CN 201210160259A CN 103424414 A CN103424414 A CN 103424414A
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China
Prior art keywords
autoclave
sediment
hydrate
occurrence status
kettle
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Pending
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CN2012101602593A
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Chinese (zh)
Inventor
刘昌岭
胡高伟
程军
业渝光
张剑
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Qingdao Institute of Marine Geology
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Qingdao Institute of Marine Geology
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Priority to CN2012101602593A priority Critical patent/CN103424414A/en
Publication of CN103424414A publication Critical patent/CN103424414A/en
Pending legal-status Critical Current

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Abstract

The invention relates to a detection device and especially relates to an in-situ detection device for occurrence of hydrates in deposits. The CT in-situ detection device for microcosmic occurrence of hydrates in deposits comprises a pressure control system, a semiconductor temperature control system, an autoclave and an X-CT scanning system. The pressure control system is communicated with the autoclave. The semiconductor temperature control system is arranged at the bottom of the autoclave. The X-CT scanning system is arranged at two sides of the autoclave. The device achieves real-time detection of distribution of deposit particles, water, hydrates and free gas during hydrate formation/decomposition process.

Description

The CT in-situ detector of hydrate microscopic occurrence status in sediment
Technical field
The present invention relates to a kind of sniffer, relate in particular to the in-situ detector of hydrate occurrence status in a kind of sediment.
Background technology
Gas hydrate in marine bottom sediment with various ways outputs such as stratiform, bulks.From microcosmic angle, it is a comparatively complicated process that hydrate substitutes pore water formation hydrate sedimentary deposit, during hydrate may be suspended in fluid in the deposition hole, also may contact or cementing sedimentary particle, these microcosmic occurrence status have material impact to physical parameters such as the pore texture of deposition medium, permeabilities, also changed the propagation of seismic event, heat simultaneously, thereby geophysical survey and the resource evaluation inverting means of hydrate have been had to crucial impact.Existing hydrate microscopic distribution characteristics is mostly imaginary theory mode, mainly, from acoustic sounding technology and the isoinversion of calorifics technology, has larger uncertainty.And the industrial X ray computed tomography scanning technology of new development (X-CT, X-Ray Computed Tomography) can be surveyed the microcosmic occurrence status of hydrate in sediment because having higher spatial resolution.Can in laboratory, the simulation by generate/decomposable process of gas hydrate carry out the micro Distribution of direct observation water compound in the deposition hole, depend primarily on design and the manufacture of experimental provision.
Some famous hydrate laboratories adopt indirect means to infer the micro Distribution of hydrate in sediment mostly both at home and abroad at present, as Southampton University of Southampton adopts the Resonant Column device, studied the acoustic response characteristics of hydrate under " excess gas ", " excessive water " and gas methods of supplying such as " solution gass ", inferred that the cementing sedimentary particle of corresponding hydrate, hydrate contact sedimentary particle and hydrate are three kinds of micro Distribution states of suspended state respectively for they; Qingdao Inst of Marine Geology adopts the geophysical modeling experimental provision, according to the velocity of sound of obtaining and hydrate concentration relation, show that hydrate first generates with suspended state in consolidated sediment, and cementing sedimentary particle generates again subsequently.The industrial X-CT(SMX-225CTS-SV that Japan comprehensive industry research institute adopts Shimadzu to produce) attempt having studied the micro Distribution of high pressure low temperature Water Under compound, but due to limited conditions, only can indirectly obtain the hydrate microscopic distribution characteristics according to algorithm, still belong to hypothetical model.Adopt direct observation method, directly obtain the micro Distribution state of hydrate in hydrate generation and decomposable process, become problem demanding prompt solution of hydrate research field.
Summary of the invention
Technique effect of the present invention can overcome above-mentioned defect, the CT in-situ detector of hydrate microscopic occurrence status in a kind of sediment is provided, it has realized the generation of hydrate and the detection of the online scanning technique of X ray, but the Real-time Obtaining hydrate generates and the micro Distribution state of decomposable process, and hydrate formation mechanism and geophysics response investigations thereof are had to important academic significance and practical value.
For achieving the above object, the present invention adopts following technical scheme: it comprises control pressurer system, semiconductor temperature system, autoclave, X-CT scanning system, control pressurer system is communicated with autoclave, the semiconductor temperature system is arranged on the autoclave bottom, and the X-CT scanning system is arranged on the both sides of autoclave.
Control pressurer system comprises gas cylinder, valve, pressure generating equipment, pipeline, and gas cylinder is successively by valve, and pressure generating equipment, pipeline are communicated with autoclave.Pipeline is provided with pressure transducer, pressure transducer connection data collector.
The semiconductor temperature system comprises temperature sensor, semiconductor refrigerating piece, temperature regulating device, and temperature sensor, semiconductor refrigerating piece are arranged in autoclave and are connected with temperature regulating device respectively, and the both sides of semiconductor refrigerating piece are provided with heat radiator.Connect fan on heat radiator.Temperature sensor is close to bottom, sample chamber, monitor temperature.
Autoclave comprises kettle, and the kettle top is provided with kettle cover, and pipeline is communicated with kettle through after kettle cover.The outside parcel vacuum heat-insulating layer of kettle.Kettle cover is provided with O-ring seals.Wherein autoclave adopts special aluminum alloy materials and thinner wall thickness, can bear hydrate and form needed pressure, thereby can be penetrated the structure of surveying its inner sample by X ray again.
The X-CT scanning system comprises x-ray source, flat panel detector, and x-ray source, flat panel detector lay respectively at the both sides of autoclave.Can in hydrate formation, be scanned in real time, be obtained the CT image of sample.
Autoclave adopts special aluminum alloy materials to make, and meets withstand voltage and condition that can be penetrated by X ray, and an outside vacuum heat-insulating layer can guarantee that temperature in the kettle is stable; Switchable type microscale/nanoscale x-ray source and high resolution flat detector have improved the detection accuracy of X-CT, and highest resolution can reach 1 μ m.Both combinations can realize the X-CT in-situ investigation of hydrate formation.Apparatus of the present invention have realized the real-time detection that sedimentary particle in hydrate generation/decomposable process, water, hydrate and free gas distribute.
The 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.O shape O-ring seal; 6. kettle cover; 7. vacuum heat-insulating layer; 8. flat panel detector; 9. sample; 10.X radiographic source; 11. temperature sensor; 12. fan; 13. semiconductor refrigerating piece; 14. temperature regulating device; 15. data acquisition unit; 16. pipeline; 17. heat radiator; 18. kettle.
Embodiment
As shown in Figure 1, in sediment of the present invention, the CT in-situ detector of hydrate microscopic occurrence status comprises control pressurer system, semiconductor temperature system, autoclave, X-CT scanning system, control pressurer system is communicated with autoclave, the semiconductor temperature system is arranged on the autoclave bottom, and the X-CT scanning system is arranged on the both sides of autoclave.
Control pressurer system comprises gas cylinder 1, valve 2, pressure generating equipment 3, pipeline 16, and gas cylinder 1 is communicated with autoclave by valve 2, pressure generating equipment 3, pipeline 16 successively.Pipeline 16 is provided with pressure transducer 4, pressure transducer 4 connection data collectors 15.The semiconductor temperature system comprises temperature sensor 11, semiconductor refrigerating piece 13, temperature regulating device 14, and temperature sensor 11, semiconductor refrigerating piece 13 are arranged in autoclave and are connected with temperature regulating device 14 respectively, and the both sides of semiconductor refrigerating piece 13 are provided with heat radiator 17.Connect fan 12 on heat radiator 17.Autoclave comprises kettle 18, and kettle 18 tops are provided with kettle cover 6, and pipeline 16 is communicated with kettle 18 through kettle cover 6 is rear.The outside parcel vacuum heat-insulating layer 7 of kettle 18.Kettle cover 6 is provided with O-ring seals 5.The X-CT scanning system comprises x-ray source 10, flat panel detector 8, and x-ray source 10, flat panel detector 8 lay respectively at the both sides of autoclave.
When using, its concrete steps are: (1) measures sediment sample 9 and packs in kettle 18, add appropriate water or SDS(lauryl sodium sulfate, and surfactant, accelerate hydrate and generate) solution, guarantee that liquid all infiltrates sand grains.(2) autoclave is fixed on objective table, by methane gas, rinses kettle 18, get rid of the air in kettle 18.(3) select x-ray source 10, the turn-on data acquisition software, adjust every sweep parameter, starts CT scan, obtains the CT image of full water sediment sample 9.(4) cooling forms hydrate.(5) record constantly the situation of change of reacting kettle inner pressure by data acquisition unit, in hydrate formation, the time is repeatedly carried out CT scan at certain intervals, obtains the data before and after sample variation in reactor.(5) scan-data is rebuild, obtained the two and three dimensions image of sample.

Claims (9)

1. the CT in-situ detector of hydrate microscopic occurrence status in a sediment, it is characterized in that, comprise control pressurer system, semiconductor temperature system, autoclave, X-CT scanning system, control pressurer system is communicated with autoclave, the semiconductor temperature system is arranged on the autoclave bottom, and the X-CT scanning system is arranged on the both sides of autoclave.
2. the CT in-situ detector of hydrate microscopic occurrence status in sediment according to claim 1, it is characterized in that, control pressurer system comprises gas cylinder (1), valve (2), pressure generating equipment (3), pipeline (16), and gas cylinder (1) is communicated with autoclave by valve (2), pressure generating equipment (3), pipeline (16) successively.
3. the CT in-situ detector of hydrate microscopic occurrence status in sediment according to claim 1, is characterized in that, pipeline (16) is provided with pressure transducer (4), pressure transducer (4) connection data collector (15).
4. the CT in-situ detector of hydrate microscopic occurrence status in sediment according to claim 1, it is characterized in that, the semiconductor temperature system comprises temperature sensor (11), semiconductor refrigerating piece (13), temperature regulating device (14), temperature sensor (11), semiconductor refrigerating piece (13) are arranged in autoclave and are connected with temperature regulating device (14) respectively, and the both sides of semiconductor refrigerating piece (13) are provided with heat radiator (17).
5. the CT in-situ detector of hydrate microscopic occurrence status in sediment according to claim 4, is characterized in that, the upper fan (12) that connects of heat radiator (17).
6. the CT in-situ detector of hydrate microscopic occurrence status in sediment according to claim 2, it is characterized in that, autoclave comprises kettle (18), and kettle (18) top is provided with kettle cover (6), and pipeline (16) is communicated with kettle (18) through after kettle cover (6).
7. the CT in-situ detector of hydrate microscopic occurrence status in sediment according to claim 6, is characterized in that, the outside parcel vacuum heat-insulating layer (7) of kettle (18).
8. the CT in-situ detector of hydrate microscopic occurrence status in sediment according to claim 6, is characterized in that, kettle cover (6) is provided with O-ring seals (5).
9. the CT in-situ detector of hydrate microscopic occurrence status in sediment according to claim 1, it is characterized in that, the X-CT scanning system comprises x-ray source (10), flat panel detector (8), and x-ray source (10), flat panel detector (8) lay respectively at the both sides of autoclave.
CN2012101602593A 2012-05-22 2012-05-22 CT in-situ detection device for microcosmic occurrence of hydrates in deposits Pending CN103424414A (en)

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CN104155317A (en) * 2014-06-24 2014-11-19 暨南大学 Field measurement and analysis system for natural gas hydrate sample
CN105606634A (en) * 2016-01-12 2016-05-25 大连理工大学 Device used for X-ray CT equipment to observe natural gas hydrate growth characteristics in blind pipe
CN106153730A (en) * 2016-06-20 2016-11-23 浙江大学 Device and measuring method thereof in site measurement seabed gassiness air in soil body burden
CN106290421A (en) * 2016-09-14 2017-01-04 大连理工大学 A kind of hydrate growth speed based on Microfocus X-ray X ray CT and effective volume measurement apparatus and method
CN108645878A (en) * 2018-05-24 2018-10-12 大连理工大学 Sea bed gas hydrate core original position pressurize CT reaction kettle devices
CN109540763A (en) * 2018-12-10 2019-03-29 青岛海洋地质研究所 The sample preparation and transfer device and method of hydrate CT and SEM joint test
CN110487645A (en) * 2019-08-22 2019-11-22 山东大学 It is applicable in the Miniature temperature control unsaturated soil triaxial tester and method of industrial CT scan
WO2020119394A1 (en) * 2018-12-11 2020-06-18 大连理工大学 Ct triaxial test device for hydrate sediments
CN112196501A (en) * 2020-09-04 2021-01-08 中国地质大学(武汉) Device and method for reinforcing natural gas hydrate reservoir by simulating microorganisms
CN112304988A (en) * 2020-10-29 2021-02-02 中国石油大学(北京) Method, device and equipment for determining occurrence state of natural gas hydrate
WO2021120251A1 (en) * 2019-12-19 2021-06-24 中国科学院广州能源研究所 Testing device and method for balanced drainage of natural gas hydrate horizontal well

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Cited By (20)

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CN104155317B (en) * 2014-06-24 2017-03-29 暨南大学 A kind of gas hydrates sample site measuring and analysis system
CN104155317A (en) * 2014-06-24 2014-11-19 暨南大学 Field measurement and analysis system for natural gas hydrate sample
CN105606634A (en) * 2016-01-12 2016-05-25 大连理工大学 Device used for X-ray CT equipment to observe natural gas hydrate growth characteristics in blind pipe
CN105606634B (en) * 2016-01-12 2018-02-16 大连理工大学 The device of gas hydrates growth characteristics in a kind of observation blind pipe for X ray CT equipment
CN106153730A (en) * 2016-06-20 2016-11-23 浙江大学 Device and measuring method thereof in site measurement seabed gassiness air in soil body burden
CN106153730B (en) * 2016-06-20 2018-11-13 浙江大学 Device and its measurement method in situ measurement seabed gassiness air in soil body content
CN106290421A (en) * 2016-09-14 2017-01-04 大连理工大学 A kind of hydrate growth speed based on Microfocus X-ray X ray CT and effective volume measurement apparatus and method
CN106290421B (en) * 2016-09-14 2018-12-21 大连理工大学 A kind of hydrate growth rate and effective volume measuring device and method based on Microfocus X-ray X ray CT
CN108645878B (en) * 2018-05-24 2020-07-24 大连理工大学 Submarine natural gas hydrate core in-situ pressure maintaining CT reaction kettle device
CN108645878A (en) * 2018-05-24 2018-10-12 大连理工大学 Sea bed gas hydrate core original position pressurize CT reaction kettle devices
CN109540763A (en) * 2018-12-10 2019-03-29 青岛海洋地质研究所 The sample preparation and transfer device and method of hydrate CT and SEM joint test
CN109540763B (en) * 2018-12-10 2019-08-06 青岛海洋地质研究所 The sample preparation and transfer device and method of hydrate CT and SEM joint test
WO2020119394A1 (en) * 2018-12-11 2020-06-18 大连理工大学 Ct triaxial test device for hydrate sediments
AU2019399653B2 (en) * 2018-12-11 2021-02-04 Dalian University Of Technology CT triaxial test device for hydrate sediments
CN110487645A (en) * 2019-08-22 2019-11-22 山东大学 It is applicable in the Miniature temperature control unsaturated soil triaxial tester and method of industrial CT scan
US11119056B2 (en) 2019-08-22 2021-09-14 Shandong University Miniature temperature-controlled triaxial tester for testing unsaturated soil suitable for micro-computed tomography (CT) scanning and method thereby
WO2021120251A1 (en) * 2019-12-19 2021-06-24 中国科学院广州能源研究所 Testing device and method for balanced drainage of natural gas hydrate horizontal well
CN112196501A (en) * 2020-09-04 2021-01-08 中国地质大学(武汉) Device and method for reinforcing natural gas hydrate reservoir by simulating microorganisms
CN112196501B (en) * 2020-09-04 2021-09-24 中国地质大学(武汉) Device and method for reinforcing natural gas hydrate reservoir by simulating microorganisms
CN112304988A (en) * 2020-10-29 2021-02-02 中国石油大学(北京) Method, device and equipment for determining occurrence state of natural gas hydrate

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