CN104569316B - A kind of CO2inject and coal bed gas enhanced recovery geochemical effect simulation test device - Google Patents
A kind of CO2inject and coal bed gas enhanced recovery geochemical effect simulation test device Download PDFInfo
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Abstract
The invention discloses a kind of CO2Inject and coal bed gas enhanced recovery geochemical effect simulation test device, belong to coal-bed gas exploitation field, including high-potting container (2), compression system (1), temperature elevation system (3), pumped vacuum systems (4), liquid sample collecting system (5), gaseous sample acquisition system (6) and electrical control and monitoring system, by compression system (1), temperature elevation system (3) provides pressure and temperature to high-potting container (2), the monitoring of whole process of the test is carried out by electrical control and monitoring system, by liquid sample collecting system (5) and gaseous sample acquisition system (6) complete in test with test after the sampling of test specimen.This device can be at the environment of test lab simulation deep fractures High Temperature High Pressure, it is achieved supercritical CO2/H2O system and coal petrography sample simulation test of geochemical reaction under the conditions of deep fractures.This device temperature-controlled precision is high, temperature fluctuation is little, be easy to control, easily install, safe and reliable.
Description
Technical field
The present invention relates to a kind of at test lab simulation deep fractures CO2Geological storage and CH4The assay device of enhanced recovery process, particularly relates to a kind of for realizing supercritical CO2/H2O system and the assay device of the geochemical reaction under coal petrography high-temperature sample, environment under high pressure, belong to coal-bed gas exploitation field.
Background technology
Development along with Chinese national economy, the supply of traditional energy gradually decreases, and greenhouse effect serious threat produced by the great amount of carbon dioxide of discharge is to whole natural ecological safety in productive life, the mankind are increasing to demand novel, clean energy resource, thus coal bed gas is novel as one, clean energy resource receives extensive concern.China has abundant coal bed gas resource, cbm development to alleviate China petroleum resources anxiety present situation, alleviate mine disaster degree, to reduce greenhouse gas emission etc. significant.How exploiting coal bed methane and improve the important problem that methane output is current research from coal seam, utilizes competitive Adsorption principle of domination, by CO2Inject coal seam can effectively replace or displacement coal seam CH4, this has become new coal bed gas and has strengthened development scheme.Coal seam CO2Geological storage and CH4Enhanced recovery (CO2-ECBM, i.e. CO2Geological Storage-Enhanced Coal Bed Methane Recovery) technology melts reduction of greenhouse gas discharge and is integrated with new energy development, paid high attention to by the whole world.Supercritical CO2Minerals in coal migration of element and Hydrocarbon and lipoid organic compound can be caused to dissolve with coal petrography generation geochemical reaction, change coal physicalchemical structure and coal seam permeability and storage capacity, to effectively applying coal seam CO2-ECBM technology is particularly critical.
In consideration of it, in test lab simulation deep fractures high temperature, high pressure, sealed environment for research CO2-ECBM technology is most important, and design one can be used at test lab simulation deep fractures environment, it is achieved supercritical CO2/H2O system and coal petrography sample assay device of geochemical reaction under the conditions of deep fractures, be coal seam CO2Geological storage and CH4The problem that enhanced recovery research is urgently to be resolved hurrily.And existing pilot system or device can not simulate the experimental enviroment of deep fractures High Temperature High Pressure, and when needing to gather test specimen, it is necessary to stop test and gather sample again and carry out data analysis.
Summary of the invention
In order to solve the problems referred to above, the present invention provides a kind of CO2Injecting and coal bed gas enhanced recovery geochemical effect simulation test device, this device can be at the environment of test lab simulation deep fractures High Temperature High Pressure, it is achieved supercritical CO2/H2O system and coal petrography sample simulation test of geochemical reaction under the conditions of deep fractures, and during test, collection gaseous sample and fluid sample can carry out data analysis.This device temperature-controlled precision is high, corrosion resistance is strong, heat balance time is short, temperature fluctuation is little, uniformity is good, be easy to control, easily install, simple to operate, safe and reliable.
In order to achieve the above object, this CO2Inject and coal bed gas enhanced recovery geochemical effect simulation test device, including:
High-potting container, the reative cell of this device, for simulated formation high temperature, high pressure, sealed environment；
Compression system, is used for by pipeline injection testing gas and water in high-potting container, and the pressure in scalable high-potting container；
Temperature elevation system, for the heating of high-potting container and being adjusted its temperature, and makes it keep constant temperature in process of the test；
Pumped vacuum systems, is connected with high-potting container, for being emptied by the gas in high-potting container；
Liquid sample collecting system, is connected with high-potting container, the liquid after collecting test neutralization test, carries out blood pressure lowering, solid-liquid separation operation；
Gaseous sample acquisition system, is connected with high-potting container, the gas after collecting test neutralization test, carry out condensing, blood pressure lowering, gas-liquid separation operation；
Electrical control and monitoring system, for being controlled process of the test, gather, show and store data；
Described high-potting container includes cylinder, end socket and sealing structure, and high-potting container is provided with working hole, and described working hole includes vacuum orifice, water inlet, air inlet and gas outlet；
Described compression system includes helium gas cylinder, methane gas cylinder, CO 2 high pressure gas cylinder, air compressor machine, electromagnetic valve, gas-liquid booster pump, water source and control gas and the valve one of water turnover, valve two, valve three, valve seven, valve eight, helium gas cylinder, methane gas cylinder, CO 2 high pressure gas cylinder and water source are connected with gas-liquid booster pump respectively, air compressor machine is connected with gas-liquid booster pump by electromagnetic valve, gas-liquid booster pump is provided with outlet and gas outlet, is connected with the water inlet on high-potting container and air inlet respectively；
Described temperature elevation system includes heating element heater and heat-insulation layer, and heat-insulation layer wraps up the cylinder of whole high-potting container, and heating element heater is located between heat-insulation layer and cylinder；
Described pumped vacuum systems includes that the vacuum orifice on vacuum pump, vacuum pump and high-potting container connects and its connecting line is provided with valve ten；
Described liquid sample collecting system include the probe tube being connected with high-potting container lower discharge port, the relief valve being placed in probe tube and and the solid-liquid separation tank that connects of the probe tube other end, in the inlet ductwork of solid-liquid separation tank and be respectively equipped with valve 11 and valve 12 on export pipeline；
Gaseous sample acquisition system includes cooler, air relief valve, condensing unit and reception tank, the import and export of cooler are connected with gas outlet and the air relief valve of high-potting container respectively, the other end of air relief valve is connected with condensing unit, one outlet of condensing unit is connected with receiving tank, further respectively has valve 13, valve 14 and valve 15 in the exit of condensing unit and reception tank；
Electrical control and monitoring system, be made up of industrial computer, display and pick-up instrument, high-speed camera, power distribution circuit and control software；
Further, the working hole on described high-potting container also includes that pressure transmitter mouth, described compression system also include the pressure transmitter being connected with pressure transmitter mouth, is provided with valve nine between high-potting container and pressure transmitter；
Further, described compression system is additionally provided with gas flow controller one, gas flow controller two and gas flow controller three, it is respectively provided at helium gas cylinder, on pipeline that methane gas cylinder, CO 2 high pressure gas cylinder are connected with gas-liquid booster pump, gas flow controller one, gas flow controller two, connecting line between gas flow controller three and gas-liquid booster pump is respectively equipped with valve four, valve five and valve six；
Further, described gaseous sample acquisition system also includes filter, and filter is located on the connecting line between cooler and air relief valve；
Further, described gaseous sample acquisition system also includes be located at the gas flow controller four on connecting line between air relief valve and condensing unit；
Further, this device also includes the support being furnished with motor, and described high-potting container is fixed on support；
Further, this device also includes that demolition set, the working hole on described high-potting container also include that explosion and gauge port, demolition set are connected with the explosion on high-potting container and gauge port；
Further, the sealing structure of described high-potting container is to be sealed structure by the Wood formula that ring, pressure pad, four cyclizations and top cover form that pins down being positioned at barrel end, and the working hole on high-potting container is all located on top cover.
The present invention is enabled to the pressure and temperature in high-potting container can be reached the pressure and temperature of deep fractures by compression system pressurization and temperature elevation system heating and thermal insulation, pumped vacuum systems can empty the air in whole device before on-test, the state of vacuum is reached as far as possible, it is ensured that the reliability of test data in making assay device；Liquid sample collecting system and gas sample collection system can gather fluid sample and gaseous sample during test and after test, it is simple to analytical data in time；Electrical control and monitoring system can make testing crew control operating operation test device at a distance, and state outer to pressure vessel carries out video monitoring, and can shoot, record process of the test, it is possible to safeguards system safety.The features such as all technical of the present invention is all up to state standards, and it is high to have temperature-controlled precision, and corrosion resistance is strong, and heat balance time is short, and temperature fluctuation is little, and uniformity is good, and data shows accurately, intuitively, compact conformation, durable in use.Possess on the basis of present invention stable performance in every respect practicality, be easy to control, easily install, the feature such as simple to operate, safe and reliable, meet supercritical CO2/H2O system needs with the geochemical reaction under coal petrography high-temperature sample, environment under high pressure.
Accompanying drawing explanation
Fig. 1 is the structural representation of the present invention.
Fig. 2 is the scattergram of working hole on high-potting container cap.
In figure: 1, compression system, 1-1a, helium gas cylinder, 1-1b, methane gas cylinder, 1-1c, CO 2 high pressure gas cylinder, 1-2a, gas flow controller one, 1-2b, gas flow controller two, 1-2c, gas flow controller three, 1-3, air compressor machine, 1-4, electromagnetic valve, 1-5, gas-liquid booster pump, 1-6, water source, 1-7, pressure transmitter, 1-8a, valve one, 1-8b, valve two, 1-8c, valve three, 1-8d, valve four, 1-8e, valve five, 1-8f, valve six, 1-8g, valve seven, 1-8h, valve eight, 1-8i, valve nine；2., high-potting container, 2-1, pin down ring, 2-2, pressure pad, 2-3, four cyclizations, 2-4, top cover, 2-4-1, vacuum orifice, 2-4-2, pressure transmitter mouth, 2-4-3, temperature-measuring port, 2-4-4, water inlet, 2-4-5, air inlet, 2-4-6, gas outlet, 2-4-7, explosion and gauge port, 2-4-8, standby mouth, 2-5, cylinder, 2-6, end socket；3, temperature elevation system, 3-1, heating element heater, 3-2, heat-insulation layer；4, pumped vacuum systems, 4-1, vacuum pump, 4-2, valve ten；5, liquid sample collecting system, 5-1, lower discharge port, 5-2, probe tube, 5-3, solid-liquid separation tank, 5-4a, valve 11,5-4b, valve 12；6, gaseous sample acquisition system, 6-1, cooler, 6-2, filter, 6-3, air relief valve, 6-4, gas flow controller four, 6-5, condensing unit, 6-6, reception tank, 6-7a, valve 13,6-7b, valve 14,6-7c, valve 15；7, pipeline；8, support.
Detailed description of the invention
The invention will be further described below in conjunction with the accompanying drawings.
As depicted in figs. 1 and 2, this CO2Inject and coal bed gas enhanced recovery geochemical effect simulation test device, including:
High-potting container 2, the reative cell of this device, for simulated formation high temperature, high pressure, sealed environment；
Compression system 1, is used for by pipeline 7 injection testing gas and water in high-potting container 2, and the pressure in scalable high-potting container 2；
Temperature elevation system 3, for heating high-potting container 2 and being adjusted its temperature, and makes it keep constant temperature in process of the test；
Pumped vacuum systems 4, is connected with high-potting container 2, for being emptied by the gas in high-potting container 2；
Liquid sample collecting system 5, is connected with high-potting container 2, the liquid after collecting test neutralization test, carries out the operation such as blood pressure lowering, solid-liquid separation；
Gaseous sample acquisition system 6, is connected with high-potting container 2, the gas after collecting test neutralization test, carry out condensing, blood pressure lowering, the operation such as gas-liquid separation；
Electrical control and monitoring system, for being controlled process of the test, gather, show and store data.
Described high-potting container 2 includes cylinder 2-5, end socket 2-6 and seals structure, and high-potting container 2 is provided with working hole, described working hole includes vacuum orifice 2-4-1, water inlet 2-4-4, air inlet 2-4-5 and gas outlet 2-4-6, cylinder 2-5 material selection 20MnMoNb III forging, end socket selects DN150 hemispherical head, using the compacting of 345R steel plate to form, working hole is for linking together high-potting container 2 and other system；
Described compression system 1 includes helium gas cylinder 1-1a, methane gas cylinder 1-1b, CO 2 high pressure gas cylinder 1-1c, air compressor machine 1-3, electromagnetic valve 1-4, gas-liquid booster pump 1-5, valve one 1-8a that water source 1-6 and multiple control gas and water pass in and out, valve two 1-8b, valve three 1-8c, valve seven 1-8g, valve eight 1-8h, helium gas cylinder 1-1a, methane gas cylinder 1-1b, CO 2 high pressure gas cylinder 1-1c and water source 1-6 is connected with gas-liquid booster pump 1-5 respectively, air compressor machine 1-3 is connected with gas-liquid booster pump 1-5 by electromagnetic valve 1-4, gas-liquid booster pump 1-5 is provided with outlet and gas outlet, it is connected with the water inlet 2-4-4 on high-potting container 2 and air inlet 2-4-5 respectively；Helium gas cylinder 1-1a, methane gas cylinder 1-1b and CO 2 high pressure gas cylinder 1-1c provide helium, methane and carbon dioxide gas to device respectively, the supply of gas is controlled by valve one 1-8a, valve two 1-8b, valve three 1-8c, electromagnetic valve 1-4 controls air compressor machine 1-3 provides power to gas-liquid booster pump 1-5, gas-liquid booster pump 1-5 is gas and water supercharging, and valve seven 1-8g, valve eight 1-8h control gas-liquid booster pump 1-5 provides gases at high pressure and water under high pressure to high-potting container 2；
Described temperature elevation system 3 includes heating element heater 3-1 and heat-insulation layer 3-2, heat-insulation layer 3-2 wraps up the cylinder 2-5 of whole high-potting container 2, heating element heater 3-1 is located between heat-insulation layer 3-2 and cylinder 2-5, by heating element heater 3-1, high-potting container 2 is heated, after being heated to design temperature, high-potting container 2 is incubated by the heat-insulation layer 3-2 arranged by heating element heater 3-1 appearance, after off-test, heating element heater 3-1 and heat-insulation layer 3-2 can be opened, cross-ventilation is relied on to realize cylinder 2-5 cooling, also can realize cylinder 2-5 by the compressed air inlet arranged bottom heating element heater 3-1 and heat-insulation layer 3-2 to cool down；
Described pumped vacuum systems 4 includes vacuum pump 4-1, vacuum orifice 2-4-1 on vacuum pump 4-1 and high-potting container 2 connects and its connecting line is provided with valve ten 4-2, valve ten 4-2 is the needle-valve that degree of regulation is higher, the Guan Bi of control piper 7 and unlatching, vacuum pump 4-1 is for emptying the air in whole assay device, the state of vacuum is reached as far as possible, it is ensured that the reliability of test data in making assay device；
Described liquid sample collecting system 5 includes the probe tube 5-2 being connected with high-potting container 2 lower discharge port 5-1, it is placed in the relief valve in probe tube 5-2 and the solid-liquid separation tank 5-3 connected with the probe tube 5-2 other end, in the inlet ductwork 7 of solid-liquid separation tank 5-3 and it is respectively equipped with valve 11 5-4a and valve 12 5-4b on export pipeline 7, Guan Bi and unlatching for control piper 7, the liquid being mixed with a small amount of solid is entered probe tube 5-2 by lower discharge port 5-1 on high-potting container 2, by the relief valve step pressure reducing in probe tube 5-2, solid-liquid separation tank 5-3 is entered with normal pressure；
nullDescribed gaseous sample acquisition system 6 includes cooler 6-1、Air relief valve 6-3、Condensing unit 6-5 and reception tank 6-6，The import and export of cooler 6-1 are connected with the gas outlet 2-4-6 and air relief valve 6-3 of high-potting container 2 respectively，The other end of air relief valve is connected with condensing unit 6-5，One outlet of condensing unit 6-5 is connected with receiving tank 6-6，Valve 13 6-7a is further respectively had in the exit of condensing unit 6-5 and reception tank 6-6、Valve 14 6-7b and valve 15 6-7c，Gas is after subcooler 6-1 cools down，Condensing unit 6-5 is entered after air relief valve 6-3 is down to 0.2MPa，The liquid that gas is formed in condensing unit 6-5，The reception tank 6-6 of 7 inflow condensing unit 6-5 bottoms by the road，Remaining gas is discharged by condensing unit 6-5 top，The air vent on condensing unit 6-5 top is controlled Guan Bi by valve 13 6-7a and is opened，Condensing unit 6-5 and the pipeline 7 received between tank 6-6 are controlled Guan Bi by valve 14 6-7b and are opened，The outlet receiving tank 6-6 bottom is controlled Guan Bi by valve 15 6-7c and is opened；
Described electrical control and monitoring system include the electrical equipments such as industrial computer, display and pick-up instrument, high-speed camera, power distribution circuit and control software composition, and major function is: the distribution to electrical equipment, the function such as the safeguard protection of system and warning；The pressure of whole experiment simulator, temperature etc. are acquired, process and are shown possess integrated console and remotely control and Non-follow control both of which on the spot；State outer to pressure vessel carries out video monitoring, with safeguards system safety；Pressure parameter detected by electric control system sensor, in collected PLC, by PLC and industrial computer communication, can observe pressure change from industrial computer and digital display meter simultaneously；Electric control system is furnished with perfect industrial control configuration and runs software, whole manual operation function of meter control cabinet can be replaced, it is simultaneously available for testing device to automatically control, control the functions such as high-speed camera shooting, recording, display indicates the procedure of operating mode figure of each real-time parameter, with curve or the current trend of diagrammatic form display parameters, historical trend, current alerts, history warning, and the printing etc. of all kinds of forms being set by the user.Meanwhile, can conveniently realize and revise the interlocked control to electrical equipment by operation software.Operator can assign instruction to PLC by host computer or permutator, changes " manual/auto " control mode of some controlled element, changes the desired value controlled or report to the police and timing controlled etc..
Working hole on described high-potting container 2 also includes pressure transmitter mouth 2-4-2, described compression system 1 also includes the pressure transmitter 1-7 being connected with the pressure transmitter mouth 2-4-2 on high-potting container 2, it is used for monitoring high-potting container 2 internal pressure, between high-potting container 2 and pressure transmitter 1-7, is provided with valve nine 1-8i to control the pressure transmitter 1-7 monitoring to high-potting container 2 internal pressure.
nullDescribed compression system 1 is additionally provided with gas flow controller one 1-2a、Gas flow controller two 1-2b and gas flow controller three 1-2c，It is respectively provided at helium gas cylinder 1-1a、Methane gas cylinder 1-1b、On the pipeline 7 that CO 2 high pressure gas cylinder 1-1c and gas-liquid booster pump 1-5 is connected，At gas flow controller one 1-2a、Gas flow controller two 1-2b、Valve four 1-8d it is respectively equipped with on connecting line between gas flow controller three 1-2c and gas-liquid booster pump 1-5、Valve five 1-8e and valve six 1-8f，Gas flow controller one 1-2a、Gas flow controller two 1-2b and gas flow controller three 1-2c controls respectively and monitors helium、The flow of methane and carbon dioxide，Valve four 1-8d、Valve five 1-8e and valve six 1-8f controls gas supply，Ensure security of system.
Described gaseous sample acquisition system 6 also includes filter 6-2, and filter is located on the connecting line between cooler 6-1 and air relief valve 6-3, for filtering out the solid impurity in the gas gathered out.
Described gaseous sample acquisition system 6 also includes being located at gas flow controller four 6-4 on connecting line between air relief valve 6-3 and condensing unit 6-5, is used for the gas flow after controlling and monitor pressure release.
This device also includes the support 8 using carbon steel plastic-blasting to manufacture, and support 8 is furnished with motor, and described high-potting container 2 is fixed on support 8, and motor is used for controlling the unlatching of high-potting container 2 top cover 2-4.
Whole assay device also includes demolition set, working hole on described high-potting container 2 also includes explosion and gauge port 2-4-7, demolition set is connected with the explosion on high-potting container 2 and gauge port 2-4-7, during superpressure, can be with releasing pressure automatically, occur to have a power failure and during burst accident, can manual pressure release, it is to avoid have an accident.
The sealing structure of described high-potting container 2 be by be positioned at cylinder 2-5 end pin down ring 2-1, the Wood formula of high pressure self-energized seal that pressure pad 2-2, four cyclization 2-3 and top cover 2-4 form seals structure, vacuum orifice 2-4-1, pressure transmitter mouth 2-4-2, temperature-measuring port 2-4-3, water inlet 2-4-4, air inlet 2-4-5, gas outlet 2-4-6, explosion and gauge port 2-4-7 and standby mouth 2-4-8 on high-potting container 2 are located on top cover 2-4；nullWood formula is sealed in pressure medium、During temperature fluctuation，Remain to keep good sealing property，Pressure pad 2-2、Top cover 2-4、Pin down ring 2-1 and four cyclization 2-3 material selection 20MnMoNb III forging，Maximum working pressure in high-potting container 2 is 35MPa，Maximum operating temperature is 350 DEG C，Process of the test mesohigh test chamber 2 is made to disclosure satisfy that the needs of the pressure and temperature simulating different deep fractures，The internal diameter of high-potting container 2 is 300mm，Internal clear length is not less than 750mm，Use vertical，Conveniently load and unload top cover 2-4 and gather gas and fluid sample，In high-potting container 2 pressure maintaining period，When pipeline and Sealing ring for container No leakage，Range of pressure fluctuations controls at below 0.05MPa，Temperature fluctuation controls within 0.5 DEG C，Make the pressure and temperature ambient stable of high-potting container 2，The precision of guarantee test.
Pipeline 7 in whole device uses 316L pipeline.
The present invention, for guaranteeing safety, is divided into control zone, trial zone, and control zone isolates with trial zone, it is ensured that human users is in safety zone.Control zone includes machinery cabinet (pressurizing tank) and centralized Control cabinet (containing monitoring).Trial zone includes air compressor machine, high temperature and pressure test container, can be observed in control room by photographic head.The present invention uses the operation sequence pressurizeed afterwards that first heats up, and makes boost process be controlled, it is ensured that experimental safe.
The CO of the present invention2Injecting and coal bed gas enhanced recovery geochemical effect simulation experiment method, step is as follows:
(a) sample tinning: pretreatment (equilibrium water conten or other) coal sample；Switch on power, connect helium gas cylinder 1-1a, methane gas cylinder 1-1b, CO 2 high pressure gas cylinder 1-1c, water source 1-6, air compressor machine 1-3 and gas-liquid booster pump 1-5；Open the nut of high-potting container 2, by the motor on support 8, top cover 2-4 is promoted, coal sample is put into cylinder 2-5, as during putting into, a small amount of sample is had to spill, the sample wiped clean that will need to spill with absorbent cotton, it is ensured that high-potting container 2 sealing surface is clean, motor by support 8, top cover 2-4 is declined, closes the nut of high-potting container 2, high-potting container 2 is accessed gas circuit；
B () airtight test: pumped vacuum systems 4 evacuation, opens lower discharge port 5-1, running control software, performs manual operation program, inject high-purity helium (purity is 99.99%) to high-potting container 2, clean high-potting container 2；Close lower discharge port 5-1, continue to inject high-purity helium, make high-potting container 2 pressure higher than test maximum pressure 1MPa；Arrange and regulate temperature elevation system 3, make the temperature stabilization of high-potting container 2 in test temperature；Pressure transmitter 1-7 gathers the pressure data of high-potting container 2, and it is good that pressure is the most then considered as system air-tightness；If any gas leak phenomenon, open top cover 2-4, repeat (a) step；
C () coal petrography geochemical reaction is tested:
Pumped vacuum systems 4 evacuation, open lower discharge port 5-1, running control software, perform manual operation program, inject a small amount of high-purity methane (purity is 99.99%) to high-potting container 2, clean high-potting container 2, pumped vacuum systems 4 evacuation again, repeat 3-5 time, it is ensured that in high-potting container 2, helium cleans up；
Close lower discharge port 5-1, arrange and regulate temperature elevation system 3, make the temperature stabilization of high-potting container 2 in test temperature；
Compression system 1 is filled with methane gas to high-potting container 2, to high pressure test chamber 2, pressure reaches coal seam reservoirs or EXPERIMENTAL DESIGN pressure, compression system 1 stops injecting gas, treat pressure stability (in 30min, pressure change is less than till 0.05MPa) in high-potting container 2, compression system 1 continues to inject methane gas to high-potting container 2, and in high-potting container 2, pressure stability is at coal seam reservoirs or EXPERIMENTAL DESIGN pressure (till pressure change is less than 0.05MPa in 30min)；
After reaching goal pressure, and temperature stabilization, according to EXPERIMENTAL DESIGN, compression system 1 injects a certain amount of reaction water in high-potting container 2；
After temperature stabilization, to high-potting container 2 injecting carbon dioxide, to high pressure test chamber 2, pressure reaches EXPERIMENTAL DESIGN pressure, (in 30min, pressure change is less than till 0.05MPa) after pressure stabilisation, continuing to inject reaction water or carbon dioxide to high-potting container 2, in making high-potting container 2, pressure stability is at EXPERIMENTAL DESIGN pressure；
Start control software and automatically gather the related datas such as the time in high-potting container 2, pressure, temperature, and data are recorded as data file；
D () gathers the fluid sample in test: close valve 11 5-4a, open lower discharge port 5-1, sample (design taken amount) is made to flow into probe tube 5-2, close lower discharge port 5-1, sample pressure release, close valve 12 5-4b, open valve 11 5-4a, make sample flow into solid-liquid separator 5-3；
E () gathers the gaseous sample in test: close valve 13 6-7a and valve 14 6-7b, open gas outlet 2-4-6, gas is made to pass sequentially through cooler 6-1, filter 6-2, air relief valve 6-3, gas flow controller four 6-4, enter condensing unit 6-5, close gas outlet 2-4-6, close valve 15 6-7c, open valve 13 6-7a and valve 14 6-7b, gathering gaseous sample by valve 13 6-7a, fluid sample flows into and receives tank 6-6；
F () pilot system is cleared up: after off-test, slowly released by gas in high-potting container 2 by gas outlet 2-4-6 and gas sample collection system 6；Releasing gas circuit connects, and unloads gaseous sample acquisition system 6, liquid sample collecting system 5 etc.；Open high-potting container 2 nut, by the motor on support 8, top cover 2-4 is promoted；Clean high-potting container 2；Cylinder 2-5 is overturn 90 °, takes out sample after reaction, scrub cylinder 2-5 with fine, soft fur brush；Cylinder 2-5 is resetted, opens high-potting container 2 lower discharge port 5-1, inject deionized water from cylinder 2-5 upper end and clean.
Claims (8)
1. a CO2Inject and coal bed gas enhanced recovery geochemical effect simulation test device, it is characterised in that including:
High-potting container (2), the reative cell of this device, for simulated formation high temperature, high pressure, sealed environment；
Compression system (1), is used for by pipeline (7) injection testing gas and water in high-potting container (2), and
Pressure in scalable high-potting container (2)；
Temperature elevation system (3), for high-potting container (2) heating and being adjusted its temperature, and makes it test
Journey keeps constant temperature；
Pumped vacuum systems (4), is connected with high-potting container (2), for being arranged by the gas in high-potting container (2)
Empty；
Liquid sample collecting system (5), is connected with high-potting container (2), the liquid after collecting test neutralization test,
Carry out blood pressure lowering, solid-liquid separation operation；
Gaseous sample acquisition system (6), is connected with high-potting container (2), the gas after collecting test neutralization test,
Carry out condensing, blood pressure lowering, gas-liquid separation operation；
Electrical control and monitoring system, for being controlled process of the test, gather, show and store data；
Described high-potting container (2) includes cylinder (2-5), end socket (2-6) and seals structure, and high-potting container
(2) being provided with working hole, described working hole includes vacuum orifice (2-4-1), water inlet (2-4-4), air inlet (2-4-5)
With gas outlet (2-4-6)；
Described compression system (1) includes that helium gas cylinder (1-1a), methane gas cylinder (1-1b), carbon dioxide are high
Air bottle (1-1c), air compressor machine (1-3), electromagnetic valve (1-4), gas-liquid booster pump (1-5), water source (1-6) and control gas
Body and the valve one (1-8a) of water turnover, valve two (1-8b), valve three (1-8c), valve seven (1-8g), valve eight (1-8h),
Helium gas cylinder (1-1a), methane gas cylinder (1-1b), CO 2 high pressure gas cylinder (1-1c) and water source (1-6) point
Not being connected with gas-liquid booster pump (1-5), air compressor machine (1-3) is connected with gas-liquid booster pump (1-5) by electromagnetic valve (1-4),
Gas-liquid booster pump (1-5) is provided with outlet and gas outlet, respectively with the water inlet (2-4-4) on high-potting container (2)
Connect with air inlet (2-4-5)；
Described temperature elevation system (3) includes heating element heater (3-1) and heat-insulation layer (3-2), and heat-insulation layer (3-2) wraps up whole
The cylinder (2-5) of high-potting container (2), heating element heater (3-1) is located between heat-insulation layer (3-2) and cylinder (2-5)；
Described pumped vacuum systems (4) includes on vacuum pump (4-1), vacuum pump (4-1) and high-potting container (2)
Vacuum orifice (2-4-1) connects and its connecting line is provided with valve ten (4-2)；
Described liquid sample collecting system (5) includes the sampling being connected with high-potting container (2) lower discharge port (5-1)
Pipe (5-2), the relief valve being placed in probe tube (5-2) and the solid-liquid separation tank (5-3) connected with probe tube (5-2) other end,
In the inlet ductwork of solid-liquid separation tank (5-3) and it is respectively equipped with valve 11 (5-4a) and valve 12 (5-4b) on export pipeline；
Gaseous sample acquisition system (6) includes cooler (6-1), air relief valve (6-3), condensing unit (6-5) and receives tank
(6-6), the import and export of cooler (6-1) respectively with gas outlet (2-4-6) and the air relief valve (6-3) of high-potting container (2)
Connecting, the other end of air relief valve is connected with condensing unit (6-5), an outlet and reception tank (6-6) of condensing unit (6-5)
Connect, further respectively have valve 13 (6-7a), valve ten in the exit of condensing unit (6-5) and reception tank (6-6)
Four (6-7b) and valve 15 (6-7c)；
Electrical control and monitoring system, by industrial computer, display and pick-up instrument, high-speed camera, power distribution circuit and control
Software forms.
A kind of CO the most according to claim 12Inject and coal bed gas enhanced recovery geochemical effect simulation test device,
It is characterized in that: the working hole on described high-potting container (2) also includes pressure transmitter mouth (2-4-2), described pressurization
System (1) also includes the pressure transmitter (1-7) being connected with pressure transmitter mouth (2-4-2), in high-potting container (2)
And between pressure transmitter (1-7), it is provided with valve nine (1-8i).
A kind of CO2 the most according to claim 2 injects and fills with coal bed gas enhanced recovery geochemical effect simulation test
Put, it is characterized in that: described compression system (1) is additionally provided with gas flow controller one (1-2a), gas flow controller
Two (1-2b) and gas flow controller three (1-2c), be respectively provided at helium gas cylinder (1-1a), methane gas cylinder (1-1b),
On the pipeline (7) that CO 2 high pressure gas cylinder (1-1c) is connected with gas-liquid booster pump (1-5), at gas flow controller one
(1-2a), between gas flow controller two (1-2b), gas flow controller three (1-2c) and gas-liquid booster pump (1-5)
Connecting line on be respectively equipped with valve four (1-8d), valve five (1-8e) and valve six (1-8f).
A kind of CO the most according to claim 12Inject and coal bed gas enhanced recovery geochemical effect simulation test device,
It is characterized in that: described gaseous sample acquisition system (6) also includes filter (6-2), and filter is located at cooler (6-1)
And on the connecting line between air relief valve (6-3).
A kind of CO the most according to claim 42Inject and coal bed gas enhanced recovery geochemical effect simulation test device,
It is characterized in that: described gaseous sample acquisition system (6) also includes be located at air relief valve (6-3) and condensing unit (6-5)
Between gas flow controller four (6-4) on connecting line.
A kind of CO the most according to claim 12Inject and coal bed gas enhanced recovery geochemical effect simulation test device,
It is characterized in that: this device also includes being furnished with the support (8) of motor, described high-potting container (2) is fixed on support (8)
On.
A kind of CO the most according to claim 12Inject and coal bed gas enhanced recovery geochemical effect simulation test device,
It is characterized in that: this device also includes that demolition set, the working hole on described high-potting container (2) also include explosion and pressure
Table mouth (2-4-7), demolition set is connected with the explosion on high-potting container (2) and gauge port (2-4-7).
8. according to a kind of CO described in claim 2 to 7 any claim2Inject and coal bed gas enhanced recovery geochemistry
Effect analog experiment apparatus, is characterized in that: the sealing structure of described high-potting container (2) is for by being positioned at cylinder (2-5)
The Wood formula that ring (2-1), pressure pad (2-2), four cyclizations (2-3) and top cover (2-4) form that pins down of end seals structure,
Working hole on high-potting container (2) is all located on top cover (2-4).
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| CN105443081B (en) * | 2016-01-08 | 2017-12-05 | 中国矿业大学(北京) | A kind of gas pumping equipment and pumping method based on thought of rotating |
| CN110376348B (en) * | 2019-07-17 | 2021-09-07 | 太原理工大学 | Supercritical water-gas-containing coal gas liquefaction experimental device and method |
| CN110286058B (en) * | 2019-07-25 | 2023-12-26 | 中国工程物理研究院总体工程研究所 | Water-meeting test device and control system thereof |
| CN113803038B (en) * | 2020-06-17 | 2022-08-12 | 中国石油大学(北京) | Shale oil pyrolysis huff and puff integrated simulation device and control method thereof |
| CN114264551B (en) * | 2021-11-24 | 2023-12-12 | 合肥通用机械研究院有限公司 | Explosion test method and explosion test system for pressure vessel |
| CN114198071B (en) * | 2021-12-16 | 2023-10-24 | 中国矿业大学 | Injection and production process for prolonging service life of coalbed methane production well group by injecting carbon dioxide |
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| US6244338B1 (en) * | 1998-06-23 | 2001-06-12 | The University Of Wyoming Research Corp., | System for improving coalbed gas production |
| CN101825555B (en) * | 2010-03-25 | 2011-08-31 | 中国矿业大学 | Device for testing axial loading/unloading gas permeability of coal |
| CN202628051U (en) * | 2012-05-18 | 2012-12-26 | 中国石油大学(北京) | Physical simulation device for substitution of coal bed methane by carbon dioxide |
| CN102944666A (en) * | 2012-12-05 | 2013-02-27 | 西南石油大学 | Shale gas reservoir recovery simulation experimental device |
| CN103278615B (en) * | 2013-05-15 | 2014-12-17 | 太原理工大学 | Test method for geological storage of carbon dioxide coal seams |
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