CN101446189A - Supercritical carbon dioxide drive physical analogue device - Google Patents

Supercritical carbon dioxide drive physical analogue device Download PDF

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Publication number
CN101446189A
CN101446189A CNA2008102469901A CN200810246990A CN101446189A CN 101446189 A CN101446189 A CN 101446189A CN A2008102469901 A CNA2008102469901 A CN A2008102469901A CN 200810246990 A CN200810246990 A CN 200810246990A CN 101446189 A CN101446189 A CN 101446189A
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China
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carbon dioxide
rock core
simulation rock
pressure
supercritical carbon
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CNA2008102469901A
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Chinese (zh)
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CN101446189B (en
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宋永臣
赵越超
刘卫国
刘瑜
张毅
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大连理工大学
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P90/00Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
    • Y02P90/70Combining sequestration of CO2 and exploitation of hydrocarbons by injecting CO2 or carbonated water in oil wells

Abstract

The invention relates to a supercritical carbon dioxide drive physical analogue device, which belongs to the technical field of petroleum engineering and technology. The device adopts two paratactic simulation core devices to be connected with an injecting system, and each simulation core device is provided with an outlet measuring system; the injecting system injects formation water, crude oil and supercritical carbon dioxide to the simulation core devices, and a temperature and pressure measuring and controlling system is adopted to control the temperature set value and the pressure value of the whole system, and the outlet measuring system is adopted to measure the volumes of the carbon dioxide, the formation water and the crude oil which pass through the simulation core devices. After the CO2 gas is cooled and liquefied, the CO2 gas is pressurized and heated up to the supercriticality, and the difficulty of the accurate measurement of the injected CO2 flow; by adopting a double-tube model, the fingering and cross flow phenomenon during the driving process of the heterogeneous reservoir CO2 can be simulated; the design pressure of the device is 0 to 40 MPa, the design temperature is 0 to 180 DEG C, and the device is mainly applied to the research on supercritical CO2 miscible drive, non-miscible drive, continues gas drive or water and gas alternate drive.

Description

Supercritical carbon dioxide drive physical analogue device
Technical field
The present invention relates to a kind of supercritical carbon dioxide drive physical analogue device, it belongs to petroleum works and technology field.
Background technology
Annotating CO 2In the oil recovery process,, have a strong impact on CO because gas channelling phenomenon can take place the non-homogeneity of sticking type fingering and oil reservoir usually 2Sweep efficiency and displacement efficiency, thereby be necessary this aspect is furtherd investigate.Physical analogy is one of the most common effective laboratory facilities, at present, and about CO 2The drive physical analogue aspect, simulation rock core system mainly is the one dimension single tube pattern that adopts metal tube sandpack column or natural core model to make on most of experimental facilitiess, can not analyze preferably gas channelling phenomenon, if adopt two dimension or three-dimensional rock core physical model, because the model complexity has improved making and running cost greatly.In addition, carry out supercritical CO 2In the drive physical analogue experimentation, how to make CO in the storage tank 2Gas reaches supercriticality and how its flow is carried out accurate measurement before entering the displacement simulation rock core, be to guarantee that experiment effect is crucial accurately near reality and experimental result.At present, the most experiments device can not well solve a this respect difficult problem.
Summary of the invention
In order to solve the problem that exists in the above-mentioned PHYSICAL MODELING OF IN, the invention provides a kind of supercritical carbon dioxide drive physical analogue device, this device will be earlier CO 2Gas is through after the cooling liquid, and the HTHP supercriticality under the easier realization experiment condition is also injected CO for solving simultaneously 2The difficult problem of flow accurate measurement; Simulation rock core device adopts two-tube model, can simulate heterogeneous reservoir CO 2Drive and occur fingering and channelling phenomenon in the process; Can finish CO in the displacement of reservoir oil transient 2, multiple parameters instantaneous measurements such as oil, the relative permeability of water three-phase fluid in porous media, saturation ratio, oil displacement efficiency, to heterogeneous reservoir CO 2Driving the sweep efficiency and the displacement efficiency that occur fingering and the influence of channelling phenomenon in the process furthers investigate.
The present invention solves the problems of the technologies described above the technical scheme that is adopted to be: a kind of supercritical carbon dioxide drive physical analogue device mainly comprises an injected system, simulation rock core device, temperature, pressure TT﹠C system and outlet metering system; Described simulation rock core device adopts the first simulation rock core device to be connected with injected system side by side with the second simulation rock core device, and the first simulation rock core device and the second simulation rock core device are provided with an outlet metering system separately; Described injected system is injected formation water, crude oil and supercritical carbon dioxide successively to simulation rock core device, and to adopt the pressure and temperature of described temperature, pressure TT﹠C system control whole system be the setting value that requires, and measures the volume of carbon dioxide by simulation rock core device, formation water, crude oil at last with the outlet metering system.
Described injected system mainly comprises three intermediate receptacles that are arranged in the air insulating box (7), provide water under high pressure to produce driving force by the side of driving piston of a high-pressure metering pump in these three intermediate receptacles, allow first intermediate receptacle, second intermediate receptacle and the 3rd intermediate receptacle drive formation water, crude oil and supercritical carbon dioxide to the first simulation rock core device and the second simulation rock core device successively.
Supercritical carbon dioxide in described first intermediate receptacle extracts liquid carbon dioxide by a carbon dioxide pump and supplies with from storage tank; The carbon dioxide that is stored in the carbon dioxide cylinder enters the storage tank that is arranged in the cryostat, changes liquid carbon dioxide into after cooling.
The described first simulation rock core device and the second simulation rock core device are arranged in the air insulating box.
Described outlet metering system mainly comprises oil-water metering pipe that connects pressure maintaining valve and the gas flowmeter that is connected the oil-water metering pipe; It also comprises the vacuum tank that connects pressure maintaining valve, adopts a manual pump to connect vacuum tank.
The invention has the beneficial effects as follows: a kind of supercritical carbon dioxide drive physical analogue device adopts two simulation rock core devices arranged side by side to be connected with injected system, and each simulation rock core device is provided with an outlet metering system separately; Injected system is injected formation water, crude oil and supercritical carbon dioxide successively to simulation rock core device, and to adopt the pressure and temperature of described temperature, pressure TT﹠C system control whole system be the setting value that requires, and measures the volume of carbon dioxide by simulation rock core device, formation water, crude oil at last with the outlet metering system.This device is earlier with CO 2Gas is through pressurization intensification again after the cooling liquid, and the HTHP supercriticality under the easier like this realization experiment condition has also solved injecting CO simultaneously 2The difficult problem of flow accurate measurement; Simulation rock core device adopts two-tube model, can simulate heterogeneous reservoir CO 2Drive and occur fingering and channelling phenomenon in the process; Injected system is injected formation water, crude oil and supercritical carbon dioxide successively to simulation rock core device, and adopts the pressure and temperature of TT﹠C system control whole system, measures the volume of carbon dioxide, formation water, crude oil at last with the outlet metering system.This device design pressure is 0~40MPa, and design temperature is 0~180 ℃, is mainly used in supercritical CO 2Mixed phase drives or non-phase-mixing driving, continuously gas drive or aqueous vapor are alternately driven etc. in the research of multiple scheme laboratory test.Can finish CO in the displacement of reservoir oil transient 2, multiple parameters instantaneous measurements such as oil, the relative permeability of water three-phase fluid in porous media, saturation ratio, oil displacement efficiency, to heterogeneous reservoir CO 2Driving the sweep efficiency and the displacement efficiency that occur fingering and the influence of channelling phenomenon in the process furthers investigate.
Description of drawings
Fig. 1 is a kind of supercritical carbon dioxide drive physical analogue device system drawing.
Among the figure: 1, CO 2Gas tank, 2, storage tank, 3, cryostat, 4, CO 2Pump, 5, distilled water container, 6, high-pressure metering pump, 7, the air insulating box, 8a, first intermediate receptacle, 8b, second intermediate receptacle, 8c, the 3rd intermediate receptacle, 9a, the first simulation rock core device, 9b, the second simulation rock core device, 10a, first pressure maintaining valve, 10b, second pressure maintaining valve, 11a, first vacuum tank, 11b, second vacuum tank, 12a, first manual pump, 12b, second manual pump, 13a, the first oil-water metering pipe, 13b, the second oil-water metering pipe, 14a, first gas flowmeter, 14b, second gas flowmeter, P, pressure meter, D, differential pressure transmitter, T, thermocouple.
The specific embodiment
Fig. 1 shows a kind of supercritical carbon dioxide drive physical analogue device system drawing.It mainly comprises an injected system, simulation rock core device, temperature, pressure TT﹠C system and outlet metering system; Simulation rock core device adopts the first simulation rock core device 9a and the second simulation rock core device 9b to be connected with injected system side by side, is arranged on first in the air insulating box 7 and simulates rock core device 9a and second and simulate rock core device 9b and be provided with one separately and export metering system.
Injected system comprises three intermediate receptacles that are arranged in the air insulating box 7, by the distilled water in a high-pressure metering pump 6 process filters absorption distilled water tanks 5, the left side of driving piston in these three intermediate receptacles provides water under high pressure to produce driving force, allows the 3rd intermediate receptacle 8c, the second intermediate receptacle 8b and the first intermediate receptacle 8a drive formation water, crude oil and supercritical carbon dioxide to the first simulation rock core device 9a and the second simulation rock core device 9b successively.Supercritical carbon dioxide among the first intermediate receptacle 8a extracts liquid carbon dioxide by a carbon dioxide pump 4 and supplies with through flap valve and switching valve from storage tank 2; Liquid carbon dioxide is to allow be stored in carbon dioxide in the carbon dioxide cylinder 1 and enter the storage tank 2 that is arranged in the cryostat 3 and generate after cooling off.
The outlet metering system is used for measuring the amount of used formation water, crude oil and carbon dioxide in simulation rock core device.The outlet metering system that the first simulation rock core device 9a uses comprises first an oil-water metering pipe 13a who connects the first pressure maintaining valve 10a, and the first gas flowmeter 14a is connected on the first oil-water metering pipe 13a by needle-valve.The first pressure maintaining valve 10a also connects one first vacuum tank 11a, adopts one first manual pump 12a through needle-valve the pressure of the first vacuum tank 11a to be regulated, to satisfy the operating pressure of system.The outlet metering system that the second simulation rock core device 9b uses comprises second an oil-water metering pipe 13b who connects the second pressure maintaining valve 10b, and the second gas flowmeter 14b is connected on the second oil-water metering pipe 13b by needle-valve.The second pressure maintaining valve 10b also connects one second vacuum tank 11b, adopts one second manual pump 12b through needle-valve the pressure of the second vacuum tank 11b to be regulated, to satisfy the operating pressure of system.
The temperature, pressure TT﹠C system is used for the temperature and pressure of observing and controlling whole system, is provided with thermocouple T, differential pressure transmitter D and pressure meter P just as shown in fig. 1.
Utilize the test procedure of above-mentioned supercritical carbon dioxide drive physical analogue device as follows:
The first step is finished preparation.Require to select for use respectively different-grain diameter quartz sand to be packed into the first simulation rock core device 9a and the second simulation rock core device 9b compacting capping according to the simulating oil deposit density, finish the preparation of simulation rock core, finish test medium Simulation of Crude Oil, formation water, CO simultaneously 2The preparation of gas is finished series work such as each connection of experiment flow, pressure testing.
In second step, the Experimental Flowing Object medium is injected intermediate receptacle (the first intermediate receptacle 8a, the second intermediate receptacle 8b, the 3rd intermediate receptacle 8c).At first, allow the carbon dioxide in the carbon dioxide cylinder enter the storage tank 2 that is arranged in the cryostat 3, after cooling, change liquid carbon dioxide into, by a carbon dioxide pump 4 liquid carbon dioxide that extracts in the storage tank 2 is squeezed among the first intermediate receptacle 8a, reached the supercriticality of requirement of experiment by the heating pressurization; Respectively Simulation of Crude Oil and formation water are injected the second intermediate receptacle 8b and the 3rd intermediate receptacle 8c.
In the 3rd step, carry out displacement test.Annotate the water under high pressure driven plunger by high-pressure metering pump 6 to intermediate receptacle one end and produce the continous-stable driving force, the first simulation rock core device 9a and the second simulation rock core device 9b that earlier formation water among the 3rd intermediate receptacle 8c are injected after vacuumizing set up saturation water; After soaking a period of time, the Simulation of Crude Oil among the second intermediate receptacle 8b is injected the displacement formation water set up saturated oils; After reaching the requirement of simulation oil reservoir, once more formation water among the intermediate receptacle 8c is injected the simulation rock core device 9a, the 9b that contain saturated oils and carry out the flood pot test process; After the water drive oil process reached desired effects, the first simulation rock core device 9a and the second simulation rock core device 9b that supercritical carbon dioxide among the first intermediate receptacle 8a is injected after the water drive carried out the gas drive experiment, reach desired effects after, stop experiment.
Simulation rock core outlet pressure adopts the first pressure maintaining valve 10a, the second pressure maintaining valve 10b and corollary system (comprising the first manual pump 12a, the second manual pump 12b, the first vacuum tank 11a, the second vacuum tank 11b) thereof to realize in the displacement test process; Measure each phase volume flow of outlet respectively by the first oil-water metering pipe 13a, the second oil-water metering pipe 13b, the first gas flowmeter 14a, the second gas flowmeter 14b; The temperature control part adopts thermostated cooling bath groove 3 control co 2 liquefaction temperature, Experimental Flowing Object temperature in the air insulating box 7 control intermediate receptacles respectively; Temperature, pressure, differential pressure adopt thermocouple T, pressure meter P, differential pressure transmitter D to gather in real time respectively.

Claims (5)

1, a kind of supercritical carbon dioxide drive physical analogue device; It is characterized in that: it mainly comprises an injected system, simulation rock core device, temperature, pressure TT﹠C system and outlet metering system; Described simulation rock core device adopts the first simulation rock core device (9a) to be connected with injected system side by side with the second simulation rock core device (9b), and the first simulation rock core device (9a) and the second simulation rock core device (9b) are provided with an outlet metering system separately; Described injected system is injected formation water, crude oil and supercritical carbon dioxide successively to simulation rock core device, and to adopt the pressure and temperature of described temperature, pressure TT﹠C system control whole system be the setting value that requires, and measures the volume of carbon dioxide by simulation rock core device, formation water, crude oil at last with the outlet metering system.
2, want art 1 described supercritical carbon dioxide drive physical analogue device according to right; It is characterized in that: described injected system mainly comprises three intermediate receptacles that are arranged in the air insulating box (7), provide water under high pressure to produce driving force by the side of driving piston of a high-pressure metering pump (6) in these three intermediate receptacles, allow first intermediate receptacle (8a), second intermediate receptacle (8b) and the 3rd intermediate receptacle (8c) drive formation water, crude oil and supercritical carbon dioxide to the first simulation rock core device (9a) and the second simulation rock core device (9b) successively.
3, want art 2 described supercritical carbon dioxide drive physical analogue devices according to right; It is characterized in that: the supercritical carbon dioxide in described first intermediate receptacle (8a) extracts liquid carbon dioxide by a carbon dioxide pump (4) and supplies with from storage tank (2); The carbon dioxide that is stored in the carbon dioxide cylinder (1) enters the storage tank (2) that is arranged in the cryostat (3), changes liquid carbon dioxide into after cooling.
4, want art 1 described supercritical carbon dioxide drive physical analogue device according to right; It is characterized in that: the described first simulation rock core device (9a) and the second simulation rock core device (9b) are arranged in the air insulating box (7).
5, want art 1 described supercritical carbon dioxide drive physical analogue device according to right; It is characterized in that: described outlet metering system mainly comprises oil-water metering pipe that connects pressure maintaining valve and the gas flowmeter that is connected the oil-water metering pipe; It also comprises the vacuum tank that connects pressure maintaining valve, adopts a manual pump to connect vacuum tank.
CN2008102469901A 2008-12-28 2008-12-28 Supercritical carbon dioxide drive physical analogue device CN101446189B (en)

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