CN205426212U - Many physics of gas hydrate exploitation field evolution simulating measurement setup - Google Patents
Many physics of gas hydrate exploitation field evolution simulating measurement setup Download PDFInfo
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- CN205426212U CN205426212U CN201620108177.8U CN201620108177U CN205426212U CN 205426212 U CN205426212 U CN 205426212U CN 201620108177 U CN201620108177 U CN 201620108177U CN 205426212 U CN205426212 U CN 205426212U
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Abstract
The utility model discloses a many physics of gas hydrate exploitation field evolution simulating measurement setup, including reation kettle, reation kettle sets up in temperature control module, and reation kettle is connected with liquid supply module, gaseous module, back pressure control module, confined pressure load -on module and the data measurement collection module of supplying with respectively. Adopt resistance tomographic image technique to carry out in the deposit the especially real -time measurement of hydrate saturation of material content, the volume change through confined pressure liquid carries out deposit volume change's real -time measurement, the experimental simulation work of temperature field, flow field and displacement field evolutionary process when combining temperature, pore pressure and the velocity of flow (produce gas and produce water speed) experimental data can realize that the hydrate steps down the exploitation.
Description
Technical field
This utility model belongs to unconventionaloil pool and hides exploitation engineering technical field, is specifically related to a kind of exploitation of gas hydrates multiple physical field Evolution Simulation test device.
Background technology
Exploitation of gas hydrates is paid much attention to by national governments, colleges and universities and research institution, has become as unconventionaloil pool and hides the study hotspot of engineering.China's South China Sea contains abundant hydrate resource, the enforcement that marine site hydrate runin is adopted is extremely urgent, but in terms of hydrate withdrawal mechanism, yet suffer from some problems, particularly during hydrate exploitation, in stratum, the research of multiple physical field evolution mechanism still can not preferably meet engineering actual demand.
Hydrate exploitation relates to heat transfer, decomposition of hydrate phase transformation, multiphase porous flow and 4 physical processes of stratum deformation.Diabatic process refers to the process that the temperature difference causes the energy to shift, and high-temp liquid injects and decomposition of hydrate is absorbed heat to cause the factor of the temperature difference to include during hydrate exploitation；Decomposition of hydrate phase transition process refers to that solid-state hydrate phase change produces natural gas and the process of water；Multiphase porous flow process refers to gas phase, liquid phase and the solid phase (hydrate and skeleton fine particle) flow event in porous media, causes gas phase, the increase of liquid phase and the change of formation parameter along with hydrate phase change；Stratum deformation process refers to that stratum effective stress and intensity change the process causing deformation, pore pressure change and the change of overlying gross pressure that multiphase porous flow, decomposition of hydrate cause all can cause effective stress to change, and the change of solid hydrate saturation makes formation strength change.The existence of above-mentioned 4 physical processes illustrates the process that in a hydrate exploitation inherently reservoir, multiple physical field develops, i.e. temperature field, flow field (pore pressure, flow velocity and content of material) and the temporal-spatial evolution process of displacement field (ess-strain).The change with space in time of solid hydrate content has important impact to the temporal-spatial evolution process of temperature field, flow field and displacement field, the propagation distance being embodied in decomposition of hydrate front reflects formation mechanical property weakening scope and decomposition of hydrate scope, it is one of hydrate stoping safety evaluation key parameter with gas producing efficiency assessment, is also the important component part of hydrate exploitation in-situ monitoring simultaneously.
The risk adopted due to hydrate runin and technical the highest, and need the spending of great number and long-term preparation, hydrate exploitation technology is studied still based on laboratory experiment.Multiple countries have carried out the design-and-build of hydrate exploitation simulated experiment apparatus, pay close attention to temperature field, the measurement of part flow field (pore pressure and flow velocity) during hydrate exploitation, and measurement for content of material particularly solid hydrate saturation is the most rare, the measurement of decomposition of hydrate front communication process cannot be realized, the particularly communication process of studies of natural gas hydrate dissociation by depressurization in different scale hydrate reservoirs front in the unconsolidated sediment of deep-sea, the concern for displacement field (strain) rarely has report especially.Existing experimental provision limits hydrate blood pressure lowering exploitation multiple physical field evolution mechanism experimental simulation, have impact on the carrying out smoothly of the aspect such as safety, capacity efficiency and field monitoring work of hydrate blood pressure lowering exploitation.
Electrical Resistance Tomography is a new generation's procedure parameter online measuring technique, is also the new and high technology of a kind of multi-crossed disciplines.The physical basis of this technology is to have different electrical conductivity based on different mediums, judges that the distribution of conductivity of object just can deduce the distribution situation of this middle medium in sensitivity field accordingly.Electrical Resistance Tomography has plurality of advantages compared with traditional Detection of Process Parameters method: can provide the two-dimensional/three-dimensional visual information of on-line continuous；The underlying parameter of a large amount of measurand can be extracted；Multiple spot, interface distributions formula, non-intruding, "dead" measurement, do not destroy, disturb physical field；Simple in construction and low cost.In terms of the achievement that various countries research worker delivers, Electrical Resistance Tomography has prospects for commercial application widely, along with going deep into of research, have been obtained for significant progress, confirmation at process model, the on-line monitoring of equipment operating conditions, geology and environmental monitoring, in the aspects such as the monitoring of phase pipe flow, Electrical Resistance Tomography has been achieved for many stem-winding achievements, also certain achievement is achieved in recent years in terms of hemihydrate content monitoring in deposit, it is increasingly becoming one of measuring technology without breaking test that hydrate research field is of greatest concern in the world.
Utility model content
For the problems referred to above overcoming existing measurement apparatus to exist, this utility model provides a kind of gas hydrates blood pressure lowering based on Electrical Resistance Tomography exploitation multiple physical field evolutionary process simulating test device, Electrical Resistance Tomography is used to carry out the real-time measurement of substances in sediments content particularly hydrate concentration, the real-time measurement of volume of sediment change is carried out by the change in volume of confined pressure liquid, in conjunction with temperature, pore pressure and flow velocity (aerogenesis and product water speed) experimental data are capable of temperature field during hydrate blood pressure lowering exploitation, the experimental simulation work of flow field and displacement field evolutionary process, the Evolution of deposit Basic Physical Properties parameter can also be comprehensively analyzed in conjunction with relevant constitutive equation and empirical model, finally provide necessary theory support for the hydrate exploitation aspect such as field monitoring conceptual design and optimization.
This utility model be employed technical scheme comprise that, a kind of exploitation of gas hydrates multiple physical field Evolution Simulation test device, including reactor, described reactor is arranged in temperature control modules, and reactor is connected with liquid supplying module, gas supplying module, back-pressure control module, confined pressure load-on module and DATA REASONING acquisition module respectively.
Further, the two ends of reactor are sealed by left end cap and right end cap screw thread gland compression mode；Installing confined pressure gum cover in reactor, reactor and confined pressure gum cover are coaxially disposed, parcel sediment sample in confined pressure gum cover；The first wire fairlead and the second wire fairlead it is provided with on reactor；Connect on reactor and have the first relief valve, between reactor and the first relief valve, be provided with stop valve.
Further, reactor is made up of 316 stainless steel materials, a diameter of 160mm of the internal cavity of reactor, a length of 1600mm；Confined pressure gum cover uses neoprene material.
Further, temperature control modules includes constant water bath box and refrigeration unit, bottom in constant water bath box is provided with two support strip, import and export diagonally opposing corner is arranged, foaming agent heat-insulation layer it is provided with on constant water bath box, reactor is arranged in constant water bath box, and the bottom of constant water bath box connects refrigeration unit.
Further, liquid supplying module includes pore water container, Pore water injection pump, gas-liquid-solid separator, visual autoclave, the first air relief valve, second liquid effusion meter；
One end of sediment sample is connected with gas-liquid-solid separator, the first air relief valve, pore water container, Pore water injection pump and second liquid effusion meter in turn by the first pipeline, and second liquid effusion meter is connected with the other end of sediment sample by pipeline；Connect on gas-liquid-solid separator and have visual autoclave.
Further, gas supplying module includes methane supply gas cylinder, booster pump, air compressor, methane recovery tank, the second air relief valve, the 3rd air relief valve, the second relief valve, gas-liquid separator, the first gas flowmeter and the second gas flowmeter；
Gas-liquid-solid separator is connected with the second relief valve, gas-liquid separator, the second gas flowmeter, methane recovery gas cylinder, booster pump, the second air relief valve, methane supply gas cylinder, the 3rd air relief valve, the first gas flowmeter in turn by second pipe, first gas flowmeter is connected by second pipe and the first pipeline, and the intersection point of second pipe and the first pipeline is between second liquid effusion meter and sediment sample；The two ends of the second relief valve are additionally provided with the 3rd pipeline, and the 3rd pipeline is provided with stop valve；Gas-liquid separator is also associated with electronic balance, and the two ends of gas-liquid separator are provided with the 4th pipeline, and the two ends of the 4th pipeline are provided with stop valve, and booster pump is also associated with air compressor.
Further, confined pressure load-on module includes confined pressure liquid container and confined pressure injection pump；Reactor is connected with stop valve, confined pressure pump, stop valve and confined pressure liquid container in turn by the 5th pipeline.
Further, collecting measurement data module includes Electrical Resistance Tomography instrument, pressure transducer, temperature probe, electrode and industrial computer；
Industrial computer is connected by wire respectively pressure transducer, temperature probe, the second gas flowmeter, first liquid effusion meter and Electrical Resistance Tomography instrument；
Pressure transducer, temperature probe and electrode may be contained within the axial direction of sediment sample；It is connected with reactor by wire；Wire on pressure transducer, temperature probe is connected through the first wire fairlead with industrial computer, and Electrical Resistance Tomography instrument is connected with sediment sample, and the wire on Electrical Resistance Tomography instrument is connected through the second wire fairlead with sediment sample.
Further, pressure transducer, temperature probe are provided with 5, are spaced apart 200mm between adjacent pressure transducer and between adjacent temperature probe；Sediment sample axially on 50mm is provided with electrode, electrode is divided into 20 layers, and every layer of electrode is made up of 5 probes.
The beneficial effects of the utility model are: this gas hydrates blood pressure lowering exploitation multiple physical field evolutionary process simulating test device is mainly made up of reactor, temperature control modules, liquid supplying module, gas supplying module, back-pressure control module, confined pressure load-on module and DATA REASONING acquisition module, and the bright spot of this device is the integration application of Electrical Resistance Tomography.Carry out lanthanum chloride hydrate and decomposition in reactor, temperature probe, pressure transducer and the electrode of series are installed, be the core component of test device；Temperature control modules provides the temperature conditions of a precise constant for hydrate blood pressure lowering exploitation multiple physical field evolutionary process simulation test；Liquid supplying module provides the pore water needed for lanthanum chloride hydrate and reclaims the pore water that decomposition of hydrate produces；Gas supplying module provides the gas needed for lanthanum chloride hydrate and reclaims the gas that decomposition of hydrate produces；Back-pressure control module provides the most constant outlet pressure for decomposition of hydrate；Confined pressure load-on module can simulate the hydrate formation pressure of reality；Collecting measurement data module collection also stores the experimental datas such as hydrate concentration, pore water saturation, temperature, pressure and sample volume deformation.
Of the present utility model it is also advantageous in that:
1. use Electrical Resistance Tomography to measure hydrate concentration and pore water saturation in real time；
2. measured with the change in volume realizing sediment sample by the change in volume of confined pressure liquid in measurement reactor；
3. collecting measurement data module is capable of measuring in real time and persistently storing of experimental data, and is equipped with Electrical Resistance Tomography data and the image analysis software of specialty；
Described measurement apparatus is capable of the simulation test of hydrate blood pressure lowering exploitation multiple physical field evolutionary process, and when exploiting for hydrate blood pressure lowering, the temporal and spatial evolution research of reservoir temperature field, flow field (pore pressure, flow velocity and content of material) and displacement field (ess-strain) provides reliable experiment porch.
Accompanying drawing explanation
Fig. 1 is the structured flowchart of this utility model exploitation of gas hydrates multiple physical field Evolution Simulation test device；
Fig. 2 is that this utility model exploitation of gas hydrates multiple physical field Evolution Simulation tests apparatus structure schematic diagram.
nullIn figure，1. reactor，2. constant water bath box，3. refrigeration unit，4. sediment sample，5. confined pressure pump，6. confined pressure liquid container，7. methane supply gas cylinder，8. booster pump，9. air compressor，10. methane recovery gas cylinder，11. pore water containers，12. Pore water injection pumps，13. gas-liquid-solid separators，14. visual autoclaves，15-1. the first air relief valve，15-2. the second air relief valve，15-3. the 3rd air relief valve，16. gas-liquid separators，17. electronic balances，18-1. the first relief valve，18-2. the second relief valve，19-1. first liquid effusion meter，19-2. second liquid effusion meter，20-1. the first gas flowmeter，20-2. the second gas flowmeter，21. Electrical Resistance Tomography instrument，22. industrial computers，23. temperature probes，24. electrodes，25. first wire fairleads，26. second wire fairleads，27. confined pressure gum covers，28-1. left end cap，28-2. right end cap，29. support bars，30. pressure transducers，31. temperature control modules，32. liquid supplying modules，33. gas supplying modules，34. back-pressure control modules，35. confined pressure load-on modules，36. collecting measurement data modules，37. stop valves；38-1. the first pipeline, 38-2. second pipe, 38-3. the 3rd pipeline, 38-4. the 4th pipeline, 38-5. the 5th pipeline.
Detailed description of the invention
Below in conjunction with detailed description of the invention, this utility model is described in detail.
This utility model provides a kind of exploitation of gas hydrates multiple physical field Evolution Simulation test device, as shown in Figure 1, including reactor 1, reactor 1 is arranged in temperature control modules 31, and reactor 1 is connected with liquid supplying module 32, gas supplying module 33, back-pressure control module 34, confined pressure load-on module 35 and DATA REASONING acquisition module 36 respectively.
Seal as in figure 2 it is shown, the two ends of reactor 1 compress mode by left end cap 28-1 and right end cap 28-2 screw thread gland；Confined pressure gum cover 27 is installed, parcel sediment sample 4 in confined pressure gum cover 27 in reactor 1；The first wire fairlead 25 and the second wire fairlead 26 it is provided with on reactor 1；Connect on reactor 1 and have the first relief valve 18-1, between reactor 1 and the first relief valve 18-1, be provided with stop valve 37.
Reactor 1 is made up of 316 stainless steel materials, a diameter of 160mm of the internal cavity of reactor 1, a length of 1600mm；Confined pressure gum cover 27 uses neoprene material.
Temperature control modules 31 includes constant water bath box 2 and refrigeration unit 3, bottom in constant water bath box 2 is provided with two support strip 29, import and export diagonally opposing corner is arranged, constant water bath box 2 appearance is provided with foaming agent heat-insulation layer, reactor 1 is arranged in constant water bath box 2, and the bottom of constant water bath box 2 connects refrigeration unit 3.
Liquid supplying module 32 includes pore water container 11, Pore water injection pump 12, gas-liquid-solid separator 13, visual autoclave the 14, first air relief valve 15-1, second liquid effusion meter 19-2；
One end of sediment sample 4 is connected with gas-liquid-solid separator the 13, first air relief valve 15-1, pore water container 11, Pore water injection pump 12 and second liquid effusion meter 19-2 in turn by the first pipeline 38-1, and second liquid effusion meter 19-2 is connected by the other end of pipeline with sediment sample 4；Connect on gas-liquid-solid separator 13 and have visual autoclave 14；In gas-liquid-solid separator the 13, first air relief valve 15-1, pore water container 11, Pore water injection pump 12, second liquid effusion meter 19-2 and sediment sample 4 parts, it is provided with stop valve 37 between adjacent parts, between gas-liquid-solid separator 13 and visual autoclave 14, is provided with stop valve 37.
Gas supplying module 33 includes that methane supplies gas cylinder 7, booster pump 8, air compressor 9, methane recovery tank the 10, second air relief valve 15-2, the 3rd air relief valve 15-3, the second relief valve 18-2, gas-liquid separator the 16, first gas flowmeter 20-1 and the second gas flowmeter 20-2；
Gas-liquid-solid separator 13 is connected with the second relief valve 18-2, gas-liquid separator the 16, second gas flowmeter 20-2, methane recovery gas cylinder 10, booster pump the 8, second air relief valve 15-2, methane supply gas cylinder the 7, the 3rd air relief valve 15-3, the first gas flowmeter 20-1 in turn by second pipe 38-2, first gas flowmeter 20-1 is connected by second pipe 38-2 and the first pipeline 38-1, and the intersection point of second pipe 38-2 and the first pipeline 38-1 is between second liquid effusion meter 19-2 and sediment sample 4；The two ends of the second relief valve 18-2 are additionally provided with the 3rd pipeline 38-3, the 3rd pipeline 38-3 and are provided with stop valve 37；Gas-liquid separator 16 is also associated with electronic balance 17, and the two ends of gas-liquid separator 16 are provided with the 4th pipeline 38-4, and the two ends of the 4th pipeline 38-4 are provided with stop valve 37, and booster pump 8 is also associated with air compressor 9；
In gas-liquid-solid separator the 13, second relief valve 18-2, gas-liquid separator the 16, second gas flowmeter 20-2 methane recovery tank 10, booster pump 8 parts, between adjacent parts, it is provided with stop valve 37；It is provided with stop valve 37 between second air relief valve 15-2 and methane supply gas cylinder 7；It is provided with stop valve 37 between 3rd air relief valve 15-3 and the first gas flowmeter 20-1；
Being provided with two stop valves 37 between second relief valve 18-2 and gas-liquid separator 16, one of them stop valve 37 is arranged between the 3rd pipeline 38-3 and the intersection point of second pipe 38-2 and the second relief valve 18-2；Another relief valve 37 is arranged between the 4th pipeline 38-4 and the intersection point of second pipe 38-2 and gas-liquid separator 16；Stop valve 37 between gas-liquid separator 16 and the second gas flowmeter 20-2 is arranged between the 4th pipeline 38-4 and the intersection point of second pipe 38-2 and gas-liquid separator 16.
Confined pressure load-on module 35 includes confined pressure liquid container 6 and confined pressure pump 5；Reactor 1 is connected with stop valve 37, confined pressure pump 5, stop valve 37 and confined pressure liquid container in turn by the 5th pipeline 38-5.
Collecting measurement data module 26 includes Electrical Resistance Tomography instrument 21, pressure transducer 30, temperature probe 23, electrode 24 and industrial computer 22；
Industrial computer 22 is connected by wire respectively pressure transducer 30, temperature probe the 23, second gas flowmeter 20-2, first liquid effusion meter 19-1 and Electrical Resistance Tomography instrument 21；
Pressure transducer 30, temperature probe 23 and electrode 24 may be contained within the axial direction of sediment sample 4；It is connected with reactor 1 by wire；Wire on pressure transducer 30, temperature probe 23 is connected through the first wire fairlead 25 with industrial computer 22, Electrical Resistance Tomography instrument 21 is connected with sediment sample 4, and the wire on Electrical Resistance Tomography instrument 21 is connected through the second wire fairlead 26 with sediment sample 4.Pressure transducer 30, temperature probe 23 are provided with 5, are spaced apart 200mm between adjacent pressure transducer 30 and between adjacent temperature probe 23；Sediment sample 4 axially on 50mm is provided with electrode 24, electrode 24 is divided into 20 layers, and every layer of electrode is made up of 5 probes.
In conjunction with Fig. 1, the enforcement step of described a kind of exploitation of gas hydrates multiple physical field evolutionary process simulating test device is illustrated:
Hydrate Filling process is simulated:
(1) temperature probe and pressure transducer 23 and Electrical Resistance Tomography electrode 24 are installed on confined pressure gum cover 27, connect left end cap 28-1, to the confined pressure gum cover 27 built-in back-up sand soil vertically placed to prepare sediment sample 4, it is horizontally installed in reactor 1, connect right end cap 28-2, the wire of temperature probe and pressure transducer 23 is drawn from the first wire fairlead 25, and electrode cable is drawn from the second wire fairlead 26；
(2) open confined pressure pump 5, the confined pressure liquid in confined pressure liquid container 6 is injected reactor 1 and applies certain confined pressure, measured the change in volume of confined pressure liquid by first liquid effusion meter 19-1；
(3) open pore water injection pump 12, by the Pore water injection sediment sample 4 in pore water container 11, measured the pore water volume controlling to inject by second liquid effusion meter 19-2；
(4) open methane supply gas cylinder 7 in sediment sample 4, inject methane gas, measured the methane gas scale of construction controlling to inject by the first gas flowmeter 20-1；
(5) open refrigeration unit 3 to lower the temperature, it is provided that the cryogenic conditions needed for lanthanum chloride hydrate；
(6) hydrate concentration change measured in real time by Electrical Resistance Tomography instrument 21, and supplements the number of times injecting methane gas according to the selection of hydrate concentration setting value, and after hydrate concentration is stable, hydrate becomes the Tibetan dummy run phase to terminate.
Hydrate exploitation multiple physical field evolutionary process simulation:
(1) the first air relief valve 15-1 is set to certain pressure value, gas, pore water and a small amount of fine grained sand separate in gas-liquid-solid separator 13, a small amount of fine grained sand enters visual autoclave 14 under gravity, pore water is recovered to pore water container 11, methane gas processes again through gas-liquid separator 16, guarantee being dried of methane gas, then methane recovery gas cylinder 10 it is recovered to, second gas flowmeter 20-2 measures instantaneous aerogenesis flow and cumulative gas production, the methane gas of recovery pours under the drive of air compressor 9 gas boosting pump 8 methane supply gas cylinder 7 in case experiment next time uses；
(2) temperature and pressure change when temperature probe and pressure transducer 23 measure hydrate exploitation, hydrate concentration and the change of pore water saturation when Electrical Resistance Tomography system (electrode 24 and Electrical Resistance Tomography instrument 21) measures hydrate exploitation, fluid flowmeter 19-1 measures the change in volume of confined pressure liquid, and industrial computer 22 is measured in real time and stores above-mentioned experimental data；
Cumulative gas production is not further added by, and temperature recovers initial value, and experiment terminates, and dismantles and clear up test device.
Wherein, this device mainly includes reactor, temperature control modules, liquid supplying module, gas supplying module, back-pressure control module, confined pressure load-on module and DATA REASONING acquisition module.
Described reactor 1 is made up of 316 stainless steel materials, a diameter of 160mm of internal cavity, a length of 1600mm；Reactor 1 two ends use and seal termination, compress mode, convenience quick for installation with screw thread gland；The confined pressure gum cover 27 of neoprene material is installed, parcel sediment sample 4 in confined pressure gum cover 27 in reactor 1；Sediment sample 4 axially upper interval 200mm arranges 5 temperature points and 5 pressure-measuring-points, and sediment sample 4 axially upper interval 50mm arranges 20 layers of electrode 24, and every layer of electrode is made up of 5 probes；Based on single hole multiwire technology, Electrical Resistance Tomography holding wire and temperature, pressure measxurement wire are derived from 4 fairleads, convenient and swift and the high pressure of 70MPa can be withstood no more than.
Confined pressure gum cover 27 safeguard measure coaxial with reactor 1 has: use support set design, opens strip groove vertically on annular brace set surface and is easy to the installation of temperature, pressure, electrode；Front support plate designs, and external diameter is consistent with internal diameter of cylinder, and employing is slidably matched, it is ensured that forward end seal hole is inserted and sealed；The boring of gripper shoe periphery is easy to confined pressure medium and is passed through.
Temperature control modules 31 uses water bath with thermostatic control form, and temperature controlling range is 25 DEG C～room temperature, and temperature control precision is ± 0.05 DEG C, is mainly made up of constant water bath box 2 and 3 groups of refrigeration machine.Constant water bath box interior space dimension is 2200 × 500 × 550 (mm)；The casing of constant water bath box 2, case lid interlayer use foaming agent heat-insulation layer；The two ends upper limb of constant water bath box 2 casing is opened two pipelines and is drawn breach, it is simple to operation and closing lid；Using direct refrigerating medium circulating cooling form, flowing velocity is fast, and homogeneous temperature accuracy of temperature control is high；On constant water bath box 2 casing, refrigerating medium imports and exports horizontal direction layout, and import is arranged in wall box top, and exports and be arranged in wall box bottom, promotes flowing self-loopa.
Liquid supplying module injects for pore-fluid circulation, is mainly made up of pore water container 11, Pore water injection pump 12, second liquid effusion meter 19-2, gas-liquid-solid separator the 13, first air relief valve 15-1 and stop valve 37.Pore water injection pump 12 (high head injection pump) designs for Double pump body, possesses two kinds of injection modes of constant current constant voltage, and maximum stream flow is up to 400mL/min, and measuring accuracy is ± 0.05mL/min, maximum pressure 40MPa；The cavity size of pore water container 11 is Φ 200 × 350mm, 316 stainless steels；Gas-liquid-solid three-phase separator 13 is pressure 40MPa, cavity size is Φ 100 × 300mm.
Gas supplying module 33, for the circulation supply of methane gas, is mainly made up of air compressor 9, booster pump 8, methane supply gas cylinder the 7, second air relief valve 15-2, the 3rd air relief valve 15-3, the first gas flowmeter 20-1 and the second gas flowmeter 20-2, gas-liquid separator 16, methane recovery tank 10 and stop valve 37.The charge velocity of methane gas is adjustable, and its upper limit is not less than 100NL/min, and gas dosing precision is ± 0.5NL/min, and the injection pressure upper limit is 40MPa.
Back-pressure control module 34 is connected with confined pressure pump 5, booster pump 8 and interstitial water injection pump 12 respectively by wire, the back-pressure control module 34 pressure by computer settings experimental system, from motion tracking pressure regulation pump regulation back-pressure, realize systematic back pressure arbitrarily to regulate, meet the back-pressure under different pressures experiment condition and control.The back-pressure range of accommodation upper limit is not less than 40MPa, and back-pressure control accuracy is ± 0.1MPa, and pressure is arranged with control deviation fluctuation amplitude less than 0.1MPa.
Confined pressure load-on module 35 is mainly made up of confined pressure liquid container 6, confined pressure injection pump 5 and stop valve 37.Its upper limit applying confined pressure is 40MPa, and precision is ± 0.1MPa, and confined pressure liquid injected pulse is less than 0.1MPa, and confined pressure is consistently higher than pore pressure 3～5MPa, and can be according to the size of pore pressure from motion tracking.Liquid container is non-pressure vessel, internal cavity a size of Φ 250 × 550mm, uses 316 stainless steels；Confined pressure injection pump can constant speed and constant voltage inject, and Double pump body designs, and programme-control confined pressure is from motion tracking.
Collecting measurement data module 26 is mainly made up of data acquisition equipments such as Electrical Resistance Tomography instrument 21, pressure transducer 30, temperature probe 23, industrial computers 22.Using Electrical Resistance Tomography to measure hemihydrate content in real time, the probe of electrode 24 arranges 20 layers along sample axially equidistant 50mm, arranges 5 for every layer, i.e. probe sum is 100, and hemihydrate content certainty of measurement is 0.5%；Temperature point 5, arranges along sample axially equidistant 200mm, staggering with Resistance probe, temperature measurement accuracy is ± 0.1 DEG C；Pressure-measuring-point 5, arranges along sample axially equidistant 200mm, identical with temperature probe position, pressure measurement accuracy is ± 0.1MPa；In reactor 1, confined pressure liquid amasss measure of the change module 1, and certainty of measurement is ± 0.5mL；Gas flowmeter 3, range is 2000mL/min mono-, and range is 500mL/min two, and precision is 0.5%, and wherein 1 measures for air inflow, and other 2 parallel connections measure for gas production；Electronic balance 1, range is 2000g, and precision is ± 0.1g；Data acquisition software 1 overlaps, and the data acquiring and recording continuous working period is no less than 6 months, and the time interval of data record is adjustable.
Above in conjunction with accompanying drawing, embodiment of the present utility model is explained in detail, but this utility model is not limited to above-mentioned embodiment, in the ken that one skilled in the relevant art is possessed, it is also possible to it is made many variations.
Claims (9)
1. an exploitation of gas hydrates multiple physical field Evolution Simulation test device, it is characterized in that, including reactor (1), described reactor (1) is arranged in temperature control modules (31), and described reactor (1) is connected with liquid supplying module (32), gas supplying module (33), back-pressure control module (34), confined pressure load-on module (35) and DATA REASONING acquisition module (36) respectively.
Exploitation of gas hydrates multiple physical field Evolution Simulation the most according to claim 1 test device, it is characterized in that, the two ends of reactor (1) compress mode by left end cap (28-1) and right end cap (28-2) with screw thread gland and seal；Installing confined pressure gum cover (27) in reactor (1), described reactor (1) and confined pressure gum cover (27) are coaxially disposed, parcel sediment sample (4) in confined pressure gum cover (27)；The first wire fairlead (25) and the second wire fairlead (26) it is provided with on described reactor (1)；The upper connection of described reactor (1) has the first relief valve (18-1), is provided with stop valve (37) between described reactor (1) and the first relief valve (18-1).
Exploitation of gas hydrates multiple physical field Evolution Simulation the most according to claim 2 test device, it is characterized in that, described reactor (1) is made up of 316 stainless steel materials, a diameter of 160mm of the internal cavity of described reactor (1), a length of 1600mm；Confined pressure gum cover (27) uses neoprene material.
Exploitation of gas hydrates multiple physical field Evolution Simulation the most according to claim 2 test device, it is characterized in that, described temperature control modules (31) includes constant water bath box (2) and refrigeration unit (3), bottom in described constant water bath box (2) is provided with two support strip (29), import and export diagonally opposing corner is arranged, described constant water bath box is provided with foaming agent heat-insulation layer on (2), described reactor (1) is arranged in constant water bath box (2), and the bottom of described constant water bath box (2) connects refrigeration unit (3).
Exploitation of gas hydrates multiple physical field Evolution Simulation the most according to claim 3 test device, it is characterized in that, described liquid supplying module (32) includes pore water container (11), Pore water injection pump (12), gas-liquid-solid separator (13), visual autoclave (14), the first air relief valve (15-1), second liquid effusion meter (19-2)；
One end of described sediment sample (4) is connected with gas-liquid-solid separator (13), the first air relief valve (15-1), pore water container (11), Pore water injection pump (12) and second liquid effusion meter (19-2) in turn by the first pipeline (38-1), and described second liquid effusion meter (19-2) is connected by the other end of pipeline with sediment sample (4)；The upper connection of described gas-liquid-solid separator (13) has visual autoclave (14).
Exploitation of gas hydrates multiple physical field Evolution Simulation the most according to claim 5 test device, it is characterized in that, described gas supplying module (33) includes methane supply gas cylinder (7), booster pump (8), air compressor (9), methane recovery tank (10), the second air relief valve (15-2), the 3rd air relief valve (15-3), the second relief valve (18-2), gas-liquid separator (16), the first gas flowmeter (20-1) and the second gas flowmeter (20-2)；
Described gas-liquid-solid separator (13) is connected with the second relief valve (18-2) in turn by second pipe (38-2), gas-liquid separator (16), second gas flowmeter (20-2), methane recovery gas cylinder (10), booster pump (8), second air relief valve (15-2), methane supply gas cylinder (7), 3rd air relief valve (15-3), first gas flowmeter (20-1), described first gas flowmeter (20-1) is connected with the first pipeline (38-1) by second pipe (38-2), the intersection point of described second pipe (38-2) and the first pipeline (38-1) is between second liquid effusion meter (19-2) and sediment sample (4)；The two ends of described second relief valve (18-2) are additionally provided with the 3rd pipeline (38-3), and described 3rd pipeline (38-3) is provided with stop valve (37)；Described gas-liquid separator (16) is also associated with electronic balance (17), the two ends of described gas-liquid separator (16) are provided with the 4th pipeline (38-4), the two ends of described 4th pipeline (38-4) are provided with stop valve (37), and described booster pump (8) is also associated with air compressor (9).
Exploitation of gas hydrates multiple physical field Evolution Simulation the most according to claim 6 test device, it is characterised in that described confined pressure load-on module (35) includes confined pressure liquid container (6) and confined pressure injection pump (5)；Described reactor (1) is connected with stop valve (37), confined pressure pump (5), stop valve (37) and confined pressure liquid container in turn by the 5th pipeline (38-5).
Exploitation of gas hydrates multiple physical field Evolution Simulation the most according to claim 7 test device, it is characterized in that, described collecting measurement data module (26) includes Electrical Resistance Tomography instrument (21), pressure transducer (30), temperature probe (23), electrode (24) and industrial computer (22)；
Described industrial computer (22) is connected by wire respectively pressure transducer (30), temperature probe (23), the second gas flowmeter (20-2), first liquid effusion meter (19-1) and Electrical Resistance Tomography instrument (21)；
Described pressure transducer (30), temperature probe (23) and electrode (24) may be contained within the axial direction of sediment sample (4)；Described it is connected with reactor (1) by wire；Wire on described pressure transducer (30), temperature probe (23) is connected through the first wire fairlead (25) with industrial computer (22), described Electrical Resistance Tomography instrument (21) is connected with sediment sample (4), and the wire on described Electrical Resistance Tomography instrument (21) is connected through the second wire fairlead (26) with sediment sample (4).
Exploitation of gas hydrates multiple physical field Evolution Simulation the most according to claim 8 test device, it is characterized in that, described pressure transducer (30), temperature probe (23) are provided with 5, are spaced apart 200mm between adjacent pressure transducer (30) and between adjacent temperature probe (23)；Described sediment sample (4) axially on 50mm is provided with electrode (24), described electrode (24) is divided into 20 layers, and every layer of electrode is made up of 5 probes.
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