CN-224203186-U - Device for simulating air injection oxidation effect of water-containing oil reservoir

CN224203186UCN 224203186 UCN224203186 UCN 224203186UCN-224203186-U

Abstract

The utility model relates to the field of oilfield production, in particular to a device for simulating an air injection oxidation effect of an aqueous oil reservoir, which comprises a containing bin, a first bottle body, a second bottle body and a third bottle body. The first end of the receiving compartment communicates with the first outlet valve and the second outlet valve, respectively. The first bottle body is communicated with the accommodating bin through a first pipeline and a first valve. The second bottle body is communicated with the accommodating bin through a second pipeline and a second valve. The third bottle body is communicated with the accommodating bin through a third pipeline and a third valve. The first bottle body, the second bottle body and the third bottle body are respectively used for filling stratum water, crude oil and air. Stratum water, crude oil and air filled in the corresponding bottle bodies are sent into the accommodating bin through the corresponding pipelines, so that an oxidation process of simulating the air injection of the water-containing oil reservoir can be realized, and the problem that the oxidation effect of the water-containing oil reservoir is difficult to simulate due to the fact that the stratum water is not injected into the oil reservoir oxidation simulation system in the prior art is solved.

Inventors

LIU PENGGANG
HUANG SHILIN
YANG YULING
ZHANG CHENLU
Fu Zhirui
CHEN JI

Assignees

中国石油化工股份有限公司
中国石油化工股份有限公司西南油气分公司

Dates

Publication Date: 20260505
Application Date: 20250508

Claims (10)

1. An apparatus for simulating the effects of air oxidation in an aqueous reservoir, comprising: a receiving compartment (23), a first end of the receiving compartment (23) being in communication with a first outlet valve (28) and a second outlet valve (29), respectively; The first bottle body (16), the first bottle body (16) is communicated with an inlet of a first pipeline (36), an outlet of the first pipeline (36) is communicated with a second end of the accommodating bin (23), and a first valve (10) is arranged on the first pipeline (36); The second bottle body (15), the second bottle body (15) is communicated with an inlet of a second pipeline (37), an outlet of the second pipeline (37) is communicated with a second end of the accommodating bin (23), and a second valve (9) is arranged on the second pipeline (37); the third bottle body (13), the third bottle body (13) is communicated with an inlet of a third pipeline (39), an outlet of the third pipeline (39) is communicated with a second end of the accommodating bin (23), and a third valve (7) is arranged on the third pipeline (39); The first bottle body (16), the second bottle body (15) and the third bottle body (13) are respectively used for filling stratum water, crude oil and air.
2. The device for simulating the air injection oxidation effect of the water-containing oil reservoir according to claim 1, further comprising a constant flow pump (11), wherein the first bottle (16), the second bottle (15) and the third bottle (13) are respectively communicated with the constant flow pump (11) through pipelines, a first pushing valve (5) is arranged on the pipeline of the constant flow pump (11) communicated with the first bottle (16), a second pushing valve (4) is arranged on the pipeline of the constant flow pump (11) communicated with the second bottle (15), a third pushing valve (2) is arranged on the pipeline of the constant flow pump (11) communicated with the third bottle (13), pistons are respectively arranged on the first bottle (16), the second bottle (15) and the third bottle (13), and the constant flow pump (11) is used for pushing a medium to squeeze the pistons.
3. A device for simulating the effect of air-injection oxidation of an aqueous reservoir according to claim 2, characterized in that the outlet of the first conduit (36), the outlet of the second conduit (37) and the outlet of the third conduit (39) are all in communication with the second end of the containment bin (23) through a main conduit (35); The main pipeline (35) is also communicated with a fourth bottle body (14) and a fifth bottle body (12); The fourth bottle body (14) is used for filling mixed gas, the fourth bottle body (14) is communicated with an inlet of a fourth pipeline (38), an outlet of the fourth pipeline (38) is communicated with the main pipeline (35), the fourth bottle body (14) is communicated with the constant flow pump (11) through a pipeline, and a fourth propulsion valve (3) is arranged on the pipeline, which is communicated with the fourth bottle body (14), of the constant flow pump (11); The fifth bottle body (12) is used for filling nitrogen, the fifth bottle body (12) is communicated with an inlet of a fifth pipeline (40), an outlet of the fifth pipeline (40) is communicated with the main pipeline (35), a fifth valve (6) is arranged on the fifth pipeline (40), the fifth bottle body (12) is communicated with the constant flow pump (11) through a pipeline, and a fifth propulsion valve (1) is arranged on a pipeline, which is communicated with the fifth bottle body (12), of the constant flow pump (11); The fourth bottle body (14) and the fifth bottle body (12) are provided with pistons, and the constant flow pump (11) is used for pushing a medium to squeeze the pistons; a one-way valve (17) and a fourth valve (8) are arranged on the main pipeline (35); The outlet of the third pipeline (39) and the outlet of the fifth pipeline (40) are communicated with the inlet of the one-way valve (17), and the outlet of the one-way valve (17) is communicated with the fourth pipeline (38).
4. A device for simulating an air-injected oxidation effect of an aqueous reservoir according to claim 3, further comprising a first pressure gauge (18), said first pressure gauge (18) being adapted to measure a pressure value in said fourth bottle (14).
5. A device for simulating the effect of air oxidation of an aqueous reservoir according to claim 3, further comprising a second pressure gauge (19), said second pressure gauge (19) being adapted to measure the pressure value within said containment compartment (23).
6. Device for simulating the effect of air-injection oxidation of an aqueous reservoir according to any one of claims 1 to 5, further comprising a housing box (20), a holder (22), a temperature probe (25), a heating plate (26) and a temperature controller (27), said housing box (20) being adapted to house a heating medium (21), said holder (22) being adapted to fix said housing compartment (23), said temperature probe (25) being adapted to measure the temperature of said heating medium (21), said temperature controller (27) being adapted to control the opening or closing of said heating plate (26).
7. An apparatus for simulating the effects of air oxidation in an aqueous reservoir according to claim 6, wherein the outlet of said first outlet valve (28) is in communication with a measuring reservoir (30).
8. An apparatus for simulating air-injection oxidation of an aqueous reservoir according to claim 6, wherein the outlet of the second outlet valve (29) is in communication with a gas-liquid separator (31), the gas-liquid separator (31) being in communication with a liquid phase collector (32) and a gas phase collector (33), respectively, the liquid phase collector (32) and the gas phase collector (33) being in communication with a gas chromatograph (34), respectively.
9. A device for simulating the effect of air oxidation of an aqueous reservoir according to claim 6, wherein the housing (23) is a hollow cylinder having a wall thickness of 2mm-3mm and an inner diameter of 40mm-80mm.
10. An apparatus for simulating an air-injection oxidation effect of an aqueous reservoir according to claim 9, wherein the hollow cylinder has a length of 800mm to 1200mm.

Description

Device for simulating air injection oxidation effect of water-containing oil reservoir Technical Field The utility model relates to the field of oilfield production, in particular to a device for simulating an air injection oxidation effect of an aqueous reservoir. Background Most of the domestic oil fields are in the middle and later stages of development at present, the water flooding development mode ensures that the water saturation of oil reservoirs (oil reservoirs refer to crude oil aggregates with exploitation value which are gathered in pores or cracks of underground rock) is high, and the water saturation is an important factor influencing the oxidation effect of crude oil in the oil reservoirs. The conventional air injection oil reservoir oxidation experimental device is used for simulating the oxidation effect after air is injected into an oil reservoir oxidation simulation system, but the conventional air injection oil reservoir oxidation experimental device does not consider the injection of formation water into the oil reservoir oxidation simulation system, so that the oxidation effect of an oil reservoir containing the formation water is difficult to simulate. In addition, for a tight reservoir where a fractured reservoir or formation fracture develops, factors such as the width, length, direction, connectivity, etc. of the fracture can affect the flow and consumption of oxygen in the air in the reservoir. Because there may be cases where oxygen in the injected air is not consumed by the oxidation of the reservoir, when the reservoir is exploited by in-situ combustion, the unconsumed oxygen may break through the combustion front along the fracture and directly enter the production well, and when the oxygen content exceeds 8%, there is a great fire explosion safety risk. In order to ensure safe production, the exploitation mode of injecting the oxygen-reduced air into the oil reservoir, namely, the oxygen-reduced air flooding, has been paid more attention to, but the existing air-injected oil reservoir oxidation experimental device is still focused on the analysis of the oil reservoir oxidation effect of the injected air, and is difficult to simulate the oil reservoir oxidation experiment of injecting the oxygen-reduced air with different oxygen concentrations. In general, the current air injection oil reservoir oxidation experimental device is difficult to truly simulate the oxidation environment of oil reservoir stratum water, and the obtained experimental result is difficult to judge the feasibility of implementing air injection for oxidation of the oil reservoir stratum water. Meanwhile, the conventional air injection oil reservoir oxidation experimental device also has no oxygen reduction air simulation system, and is difficult to simulate oil reservoir oxidation experiments for injecting oxygen reduction air with different oxygen concentrations. Disclosure of utility model The utility model aims to overcome the defect that in the prior art, the air injection oil reservoir oxidation experimental device does not consider the injection of formation water into an oil reservoir oxidation simulation system and is difficult to simulate the oxidation effect of an oil reservoir containing formation water, and provides a device for simulating the air injection oxidation effect of an oil reservoir containing water. The utility model provides a device for simulating the air injection oxidation effect of an aqueous oil reservoir, which comprises the following components: The first end of the accommodating bin is communicated with the first outlet valve and the second outlet valve respectively; The first bottle body is communicated with an inlet of a first pipeline, an outlet of the first pipeline is communicated with a second end of the accommodating bin, and a first valve is arranged on the first pipeline; the second bottle body is communicated with an inlet of a second pipeline, an outlet of the second pipeline is communicated with a second end of the accommodating bin, and a second valve is arranged on the second pipeline; the third bottle body is communicated with an inlet of a third pipeline, an outlet of the third pipeline is communicated with the second end of the accommodating bin, and a third valve is arranged on the third pipeline; the first bottle body, the second bottle body and the third bottle body are respectively used for filling stratum water, crude oil and air. The utility model provides a device for simulating an air injection oxidation effect of an aqueous oil reservoir, wherein a containing bin is used for containing an artificial rock core with the size matched with the containing bin, and the artificial rock core is used as a closed container for simulating the air injection oxidation process of the aqueous oil reservoir. The first outlet valve is used for discharging redundant stratum water in the experimental process, and the second outlet valve is used for discharging substa