CN212207027U - Device for transforming hydrothermal geothermal reservoir through experimental simulation of carbon dioxide - Google Patents
Device for transforming hydrothermal geothermal reservoir through experimental simulation of carbon dioxide Download PDFInfo
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- CN212207027U CN212207027U CN202021026259.0U CN202021026259U CN212207027U CN 212207027 U CN212207027 U CN 212207027U CN 202021026259 U CN202021026259 U CN 202021026259U CN 212207027 U CN212207027 U CN 212207027U
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Abstract
The utility model discloses a device of experiment simulation carbon dioxide transformation hydrothermal type geothermal reservoir, including simulation cabin, thermostated container, first force (forcing) pump, first pressure sensing pole, second force (forcing) pump, second pressure sensing pole, third force (forcing) pump, third pressure sensing pole, CO2Gas cylinder, N2A gas cylinder, a first conduit, a second conduit, a third conduit, a funnel, a first solution barrel, a fourth conduit, a fifth conduit, a sixth conduit, a second solution barrel, a seventh conduit, a solution bottle, an eighth conduit, and a ninth conduitThe device can simulate carbon dioxide in the laboratory to carry out fracturing or acidizing to hydrothermal type sandstone heat storage and carbonate rock base rock heat storage.
Description
Technical Field
The utility model belongs to the technical field of geothermal resource development, a device of hydrothermal type geothermal reservoir is reformed transform to experiment simulation carbon dioxide is related to.
Background
Geothermal resources are used as a clean renewable energy source with high competitiveness and play an important role in dealing with global climate change, energy conservation, emission reduction and haze treatment. The hydrothermal geothermal resource is a geothermal resource which is mainly made of steam or liquid water and has the temperature of over 25 ℃, the burial depth is usually 200 meters deep and 3000 meters shallow, and the hydrothermal geothermal resource is a main source for utilizing geothermal resources for heating and power generation in China at present. The sandstone hydrothermal type heat storage and the bedrock (carbonate) hydrothermal type heat storage can be divided according to lithology. The sandstone-type hydrothermal geothermal resource heat storage is usually distributed in a sandstone stratum with high permeability, but due to the compaction effect of the stratum, rock particles are cemented, the connectivity is poor, and the characteristics of low water yield, difficult recharging and the like are often generated. The bedrock hydrothermal type geothermal heat storage is usually a limestone stratum, the porosity and permeability of the stratum are greatly influenced by the development degree of cracks or karst caves, if the cracks do not develop, the water yield of geothermal drilling wells can be greatly reduced, and the development effect and the economy of geothermal resources are directly influenced. Aiming at the heat storage characteristics, fracturing or acidification is needed to improve the permeability of heat storage, increase the water yield and the recharge quantity, and greatly improve the economy.
Earlier studies showed that CO2As a fracturing fluid, the fracturing fluid can effectively reduce the fracture initiation pressure during fracturing, generates a small-scale large-scale complex fracture network, has long fracture extension distance and good fracturing flowback effect, and is a better medium for the fracturing of a hydrothermal geothermal reservoir. CO 22The acid fluid can enter a geothermal stratum, can effectively dissolve clay minerals in a sandstone stratum, can store carbonate rock heat, can play a better role in corrosion, and can effectively dissolve the clay minerals in the sandstone stratumThe physical property and the connectivity of the geothermal reservoir are improved, and a good reservoir improving effect is achieved.
At present, for CO2The research on the effect and mechanism of improving hydrothermal geothermal reservoir is still in the preliminary stage, and CO with different concentrations2The improvement effects of acidification, fracturing and the like on different types of heat storage are not clear, and related simulation experiment equipment is lacked.
Therefore, there is a need for an apparatus and a system for transforming hydrothermal geothermal reservoir by experimental simulation of carbon dioxide.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome above-mentioned prior art's shortcoming, provide a device of experiment simulation carbon dioxide transformation hydrothermal type geothermal reservoir, the device can simulate carbon dioxide in the laboratory and carry out fracturing or acidizing to hydrothermal type sandstone heat storage and carbonate rock basement rock heat storage.
In order to achieve the above object, the device for transforming hydrothermal geothermal reservoir by experimental simulation of carbon dioxide comprises a simulation cabin, a thermostat, a first pressure pump, a first pressure sensing rod, a second pressure pump, a second pressure sensing rod, a third pressure pump, a third pressure sensing rod, a CO2Gas cylinder, N2A gas cylinder, a first conduit, a second conduit, a third conduit, a funnel, a first solution barrel, a fourth conduit, a fifth conduit, a sixth conduit, a second solution barrel, a seventh conduit, a solution cylinder, an eighth conduit, and a ninth conduit;
the geothermal reservoir sample is positioned in a simulation cabin, the simulation cabin is positioned in a thermostat, a first pressure sensing plate is arranged at the top of the geothermal reservoir sample, a first pressure pump is connected with the first pressure sensing plate through a first pressure sensing rod, a second pressure sensing plate is arranged on the right side face of the geothermal reservoir sample, the second pressure pump is connected with the second pressure sensing plate through a second pressure sensing rod, a third pressure sensing plate is arranged on the front side face of the geothermal reservoir sample, and the third pressure pump is connected with the third pressure sensing plate through a third pressure sensing rod;
CO2outlet of gas cylinder and N2The outlet of the gas cylinder is communicated with the inlet of the first conduit, and the outlet of the first conduitThe second conduit is communicated with an inlet on the left side surface of the simulation cabin; the upper end of a third conduit is communicated with the funnel, the lower end of the third conduit is inserted into the first solution barrel, a fourth conduit is inserted into the first solution barrel, the other end of the fourth conduit is communicated with the inlet at the top of the simulation cabin through a fifth conduit, the outlet at the bottom of the simulation cabin is communicated with the second solution barrel through a sixth conduit, one end of a seventh conduit is inserted into the solution bottle, the other end of the seventh conduit is communicated with the outlet at the right side of the simulation cabin through an eighth conduit, and the end of a ninth conduit is inserted into the solution bottle.
CO2The outlet of the gas cylinder is communicated with the first conduit through a first valve, a tenth conduit, a first liquid pump and an eleventh conduit, and the eleventh conduit is provided with a first flowmeter.
N2The outlet of the gas cylinder is communicated with the first conduit through a twelfth conduit, and the twelfth conduit is provided with a second valve, a second liquid extraction device and a second flow meter.
The first pipe is provided with a third flowmeter and a third valve.
The third conduit is provided with a fourth valve.
And the fourth conduit is provided with a third liquid pump, a fifth valve and a fourth flowmeter.
And a sixth valve and a fourth liquid pump are arranged on the sixth conduit.
And a fifth flowmeter and a seventh valve are arranged on the eighth conduit.
An eighth valve is arranged on the ninth conduit.
Also comprises a bracket for supporting the incubator.
The utility model discloses following beneficial effect has:
experiment simulation carbon dioxide reform transform hydrothermal type geothermal reservoir's device when concrete operation, utilize drawing liquid pump, thermostated container and force (forcing) pump simulation different hydrothermal type heat reservoir stratum required geological temperature, pressure condition, the simulation under-deck can be according to actual stratum characteristic, carry out different lithology combination and different structure form design according to experimental design, can develop CO2、N2Fracturing and fracturing experiment and acidizing solution of isofluidAnd (5) corrosion test. The formation water state in the hydrothermal geothermal reservoir can be simulated really by injecting fluids with different ion concentrations into the simulation cabin; by CO2Fluid or CO2And N2Proportionally mixed fluid is injected into the simulation cabin at a certain speed to perform fracturing or injection soaking on rock samples in the simulation cabin, and hydrothermal geothermal rock samples are observed and CT scanned before and after fracturing or soaking, so that macroscopic and microscopic analysis can be performed, and qualitative and quantitative evaluation of CO can be performed2Fracturing and soaking the geothermal reservoir rock sample. CO 22And when the fluid is used as fracturing fluid to fracture the geothermal reservoir rock sample, the fracture initiation pressure can be effectively reduced, the complexity of the fracture is increased, and the damage to the heat storage stratum is reduced. The experimental device and the system can be used for measuring CO under different geological backgrounds2The fluid qualitatively and quantitatively evaluates the transformation effect of the hydrothermal geothermal reservoir by the physical property change before and after fracturing and soaking corrosion of the hydrothermal geothermal reservoir, and has simple structure and convenient operation.
Drawings
Fig. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic diagram of a configuration of a geothermal reservoir;
FIG. 3 is a schematic diagram of another configuration of a geothermal reservoir;
fig. 4 is another schematic structural diagram of a geothermal reservoir.
Wherein 1 is CO2A gas cylinder, 2 as a first valve, 3 as a tenth conduit, 4 as a first liquid pump, 5 as an eleventh conduit, 6 as a first flow meter, 7 as N2A gas cylinder, 8 is a second valve, 9 is a second liquid pump, 10 is a second flow meter, 11 is a twelfth conduit, 12 is a first conduit, 13 is a third valve, 14 is a third flow meter, 15 is a second conduit, 16 is a first solution barrel, 17 is a third conduit, 18 is a fourth valve, 19 is a funnel, 20 is a fourth conduit, 21 is a third liquid pump, 22 is a fifth valve, 23 is a fourth flow meter, 24 is a fifth conduit, 25 is a thermostat, 26 is a simulation chamber, 27 is a first pressure pump, 28 is a first pressure sensing rod, 29 is a first pressure sensing plate, 30 is a second pressure pump, 31 is a second pressure sensing rod, 32 is a second pressure sensing plate,33 is a third pressurizing pump, 34 is a third pressure sensing rod, 35 is a third pressure sensing plate, 36 is a sixth valve, 37 is a sixth conduit, 38 is a fourth liquid pump, 39 is a second solution tank, 40 is a bracket, 41 is an eighth conduit, 42 is a fifth flow meter, 43 is a seventh valve, 44 is a seventh conduit, 45 is a ninth conduit, 46 is an eighth valve, and 47 is a solution bottle.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings:
referring to fig. 1, the device for transforming hydrothermal geothermal reservoir by experimental simulation of carbon dioxide comprises a simulation cabin 26, a thermostat 25, a first pressure pump 27, a first pressure sensing rod 28, a second pressure pump 30, a second pressure sensing rod 31, a third pressure pump 33, a third pressure sensing rod 34, a CO sensor2Gas cylinders 1, N2 A gas cylinder 7, a first conduit 12, a second conduit 15, a third conduit 17, a funnel 19, a first solution tank 16, a fourth conduit 20, a fifth conduit 24, a sixth conduit 37, a second solution tank 39, a seventh conduit 44, a solution cylinder 47, an eighth conduit 41, and a ninth conduit 45; the geothermal reservoir sample is positioned in a simulation cabin 26, the simulation cabin 26 is positioned in a thermostat 25, a first pressure sensing plate 29 is arranged at the top of the geothermal reservoir sample, a first pressure pump 27 is connected with the first pressure sensing plate 29 through a first pressure sensing rod 28, a second pressure sensing plate 32 is arranged on the right side face of the geothermal reservoir sample, a second pressure pump 30 is connected with the second pressure sensing plate 32 through a second pressure sensing rod 31, a third pressure sensing plate 35 is arranged on the front side face of the geothermal reservoir sample, and a third pressure pump 33 is connected with the third pressure sensing plate 35 through a third pressure sensing rod 34; CO 22Outlet of gas cylinder 1 and N2The outlet of the gas cylinder 7 is communicated with the inlet of the first conduit 12, and the outlet of the first conduit 12 is communicated with the inlet of the left side surface of the simulation cabin 26 through the second conduit 15; the upper end of the third conduit 17 is communicated with the funnel 19, the lower end of the third conduit 17 is inserted into the first solution barrel 16, the fourth conduit 20 is inserted into the first solution barrel 16, the other end of the fourth conduit 20 is communicated with the inlet at the top of the simulation cabin 26 through the fifth conduit 24, the outlet at the bottom of the simulation cabin 26 is communicated with the second solution barrel 39 through the sixth conduit 37One end of the seventh conduit 44 is inserted into the solution bottle 47, the other end of the seventh conduit 44 is connected to the outlet on the right side of the simulation chamber 26 via the eighth conduit 41, and the end of the ninth conduit 45 is inserted into the solution bottle 47.
In particular, CO2The outlet of the gas cylinder 1 is communicated with a first conduit 12 through a first valve 2, a tenth conduit 3, a first liquid pump 4 and an eleventh conduit 5, and the eleventh conduit 5 is provided with a first flowmeter 6; n is a radical of2The outlet of the gas cylinder 7 is communicated with a first conduit 12 through a twelfth conduit 11, and the twelfth conduit 11 is provided with a second valve 8, a second liquid pump 9 and a second flowmeter 10; the first conduit 12 is provided with a third flow meter 14 and a third valve 13; a fourth valve 18 is arranged on the third conduit 17; the fourth conduit 20 is provided with a third liquid pump 21, a fifth valve 22 and a fourth flowmeter 23; a sixth valve 36 and a fourth liquid pump 38 are arranged on the sixth conduit 37; the eighth conduit 41 is provided with a fifth flow meter 42 and a seventh valve 43; an eighth valve 46 is provided on the ninth conduit 45.
The utility model discloses still including the support 40 that is used for supporting thermostated container 25.
The size and the dimension of each pressure sensing plate are consistent with the size of the square simulation cabin 26, and the size of the simulation cabin 26 is 80cm multiplied by 80 cm; 2/3 where the amount of water in the first solution tank 16 exceeds its volume; the solution bottle 47 contains 2/3 volumes of lime water; the simulation cabin 26 is positioned in the constant temperature box 25, the temperature range of the constant temperature box 25 is 20-200 ℃, and the size of the constant temperature box 25 is 100cm multiplied by 100 cm; the measuring range of each flowmeter is 1000ml/min, the precision is 0.1ml/min, and the pressure resistance is 50 MPa; the measuring range of each pressure sensor is 0-50MPa, and the measuring precision is 0.1 MPa.
The utility model discloses a concrete working process does:
1) according to the experimental design, a hydrothermal geothermal reservoir is prepared, the thermal reservoir lithology and the structural form are combined according to the experimental setting requirements, as shown in the figure 2, the figure 3 and the figure 4, the size of the prepared thermal reservoir rock sample is 80cm multiplied by 80cm, and the error caused by small sample size is reduced; performing surface photographing description and CT three-dimensional scanning on the rock samples, measuring the porosity and permeability of each group of rock samples, preparing a plurality of groups according to experimental requirements, and ensuring the consistency of the mechanics of the rock samples and the properties of rock and ore;
2) placing the rock sample into a simulation cabin 26, fixing the simulation cabin 26 in a constant temperature box 25, placing the pressure sensing plates on the surface vertical to the simulation cabin 26, adjusting the constant temperature box 25, a first pressure pump 27, a second pressure pump 30 and a third pressure pump 33, and setting the temperature and the pressure of the experiment;
3) according to experimental conditions, the fourth valve 18 is opened, salt is added from the hopper 19, the ion species and the ion concentration in the solution barrel are configured, the third valve 13 and the seventh valve 43 are closed, the fifth valve 22 and the sixth valve 36 are opened, the third liquid pump 21 and the fourth liquid pump 38 are enabled to work, and specific formation water is injected into the simulation cabin 26;
4) closing the fifth valve 22 and the sixth valve 36, opening the first valve 2, the second valve 8, the third valve 13 and the seventh valve 43, and enabling CO to flow by the first liquid pump 4 or the second liquid pump 9 according to a certain proportion and rate2And N2Injecting single or mixed gas into the simulation cabin 26 to fracture the rock sample, observing the fracturing effect through the solution bottle 47, and stopping the fracturing experiment after the solution bottle 47 is continuously turbid for a period of time;
5) the rock sample is replaced again, after fracturing is completed, the third valve 13 and the seventh valve 43 are closed, the simulation cabin 26 is unloaded to load pressure, the surface crack condition of the rock sample is observed, the porosity and the permeability of the rock sample are measured, and CT three-dimensional scanning is carried out;
6) closing the second valve 8 and the fifth valve 22, opening the first valve 2, the third valve 13 and the seventh valve 43, and using the first liquid pump 4 to make CO flow in a certain proportion and rate2Injecting the rock sample into the simulation cabin 26 for soaking and corrosion, observing the injection effect through the solution bottle 47, stopping injecting after the solution bottle 47 is turbid for a period of time, closing valves, and soaking for not less than 24 hours;
7) after the soaking experiment is finished, unloading the loading pressure of the simulation cabin 26, observing the surface crack condition of the rock sample, measuring the porosity and permeability of the rock sample, and performing CT three-dimensional scanning;
8) after the experiment is completed, the pipeline is cleaned, and each valve is monitored and closed.
Performing multiple sets of comparison experiments according to the experimental scheme, analyzing differences, and selecting CO2And (3) fracturing and soaking to improve the optimal combination of the heat storage effect.
Claims (10)
1. The device for transforming hydrothermal geothermal reservoir by experimental simulation of carbon dioxide is characterized by comprising a simulation cabin (26), a constant temperature box (25), a first pressure pump (27), a first pressure sensing rod (28), a second pressure pump (30), a second pressure sensing rod (31), a third pressure pump (33), a third pressure sensing rod (34), a CO (carbon dioxide) layer2Gas cylinder (1), N2The device comprises a gas cylinder (7), a first conduit (12), a second conduit (15), a third conduit (17), a funnel (19), a first solution barrel (16), a fourth conduit (20), a fifth conduit (24), a sixth conduit (37), a second solution barrel (39), a seventh conduit (44), a solution bottle (47), an eighth conduit (41) and a ninth conduit (45);
the geothermal reservoir sample is positioned in a simulation cabin (26), the simulation cabin (26) is positioned in a thermostat (25), a first pressure sensing plate (29) is arranged at the top of the geothermal reservoir sample, a first pressure pump (27) is connected with the first pressure sensing plate (29) through a first pressure sensing rod (28), a second pressure sensing plate (32) is arranged on the right side face of the geothermal reservoir sample, a second pressure pump (30) is connected with the second pressure sensing plate (32) through a second pressure sensing rod (31), a third pressure sensing plate (35) is arranged on the front side face of the geothermal reservoir sample, and the third pressure pump (33) is connected with the third pressure sensing plate (35) through a third pressure sensing rod (34);
CO2outlet of gas cylinder (1) and N2The outlet of the gas cylinder (7) is communicated with the inlet of a first guide pipe (12), and the outlet of the first guide pipe (12) is communicated with the inlet of the left side surface of the simulation cabin (26) through a second guide pipe (15); the upper end of a third conduit (17) is communicated with a funnel (19), the lower end of the third conduit (17) is inserted into a first solution barrel (16), a fourth conduit (20) extends into the first solution barrel (16), the other end of the fourth conduit (20) is communicated with an inlet at the top of a simulation cabin (26) through a fifth conduit (24), an outlet at the bottom of the simulation cabin (26) is communicated with a second solution barrel (39) through a sixth conduit (37), one end of a seventh conduit (44) is inserted into a solution bottle (47), and the other end of the seventh conduit (44) is communicated with a funnel (19) through an eighth conduit (41)The outlet of the right side of the simulation cabin (26) is communicated, and the end part of a ninth conduit (45) is inserted into the solution bottle (47).
2. The device for experimentally simulating carbon dioxide reforming of hydrothermal geothermal reservoir as claimed in claim 1, wherein CO is2The outlet of the gas cylinder (1) is communicated with the first conduit (12) through the first valve (2), the tenth conduit (3), the first liquid pump (4) and the eleventh conduit (5), and the eleventh conduit (5) is provided with a first flowmeter (6).
3. The device for experimentally simulating carbon dioxide reforming of hydrothermal geothermal reservoir according to claim 2, wherein N is N2The outlet of the gas cylinder (7) is communicated with the first conduit (12) through a twelfth conduit (11), and the twelfth conduit (11) is provided with a second valve (8), a second liquid pump (9) and a second flowmeter (10).
4. Device for experimentally simulating carbon dioxide reforming of a hydrothermal geothermal reservoir according to claim 3, characterized in that the first conduit (12) is provided with a third flow meter (14) and a third valve (13).
5. Device for experimentally simulating carbon dioxide reforming of a hydrothermal geothermal reservoir according to claim 4, characterized in that the third conduit (17) is provided with a fourth valve (18).
6. Device for experimental simulation of carbon dioxide reforming of a hydrothermal geothermal reservoir according to claim 5, characterized in that the fourth conduit (20) is provided with a third liquid pump (21), a fifth valve (22) and a fourth flow meter (23).
7. Device for experimentally simulating carbon dioxide reforming of a hydrothermal geothermal reservoir according to claim 6, characterized in that a sixth valve (36) and a fourth liquid pump (38) are arranged on the sixth conduit (37).
8. Device for experimentally simulating carbon dioxide reforming of a hydrothermal geothermal reservoir according to claim 7, characterized in that the eighth conduit (41) is provided with a fifth flowmeter (42) and a seventh valve (43).
9. Device for experimental simulation of carbon dioxide reforming of a hydrothermal geothermal reservoir according to claim 8, characterized in that the ninth conduit (45) is provided with an eighth valve (46).
10. Device for experimental simulation of carbon dioxide reforming of a hydrothermal geothermal reservoir according to claim 1, characterized in that it further comprises a support (40) for supporting the oven (25).
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113049763A (en) * | 2021-03-08 | 2021-06-29 | 西南石油大学 | Experimental testing device and testing method for salt precipitation concentration of high-temperature high-pressure real formation water |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113049763A (en) * | 2021-03-08 | 2021-06-29 | 西南石油大学 | Experimental testing device and testing method for salt precipitation concentration of high-temperature high-pressure real formation water |
| CN113049763B (en) * | 2021-03-08 | 2022-02-11 | 西南石油大学 | Experimental testing device and testing method for salt precipitation concentration of high-temperature high-pressure real formation water |
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