CN210051671U - Carbon dioxide foam drives microcosmic seepage flow experimental apparatus - Google Patents
Carbon dioxide foam drives microcosmic seepage flow experimental apparatus Download PDFInfo
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- CN210051671U CN210051671U CN201920525161.0U CN201920525161U CN210051671U CN 210051671 U CN210051671 U CN 210051671U CN 201920525161 U CN201920525161 U CN 201920525161U CN 210051671 U CN210051671 U CN 210051671U
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Abstract
The utility model provides a microcosmic seepage flow experimental apparatus is driven to carbon dioxide foam mainly includes carbon dioxide gas cylinder, carbon dioxide flow control valve, first differential pressure table, second differential pressure table, third differential pressure table, multirange differential pressure table, twin-cylinder pump, bubble making machine, piston container, ring pressure tracking pump, rock core holder, thermostated container, back pressure container, vapour and liquid separator etc.. The foam maker is connected with the piston container, and a foaming agent and a surfactant are contained in the foam maker for foaming; the upper side of the core holder is connected with a first pressure difference meter, a second pressure difference meter and a third pressure difference meter, and the left side of the core holder is connected with a piston container (containing formation water and foam solution, 500 mL); the piston container and the rock core holder are both arranged in a constant temperature box, and the air bath is used for heating to truly simulate the formation temperature; the medium-pressure pump is connected with the core holder to truly simulate the formation confining pressure borne by the core; the experimental device is simple and convenient to operate, can accurately and efficiently measure pressure changes at different positions in the carbon dioxide foam displacement process under the high-temperature and high-pressure conditions, and provides technical support for observing the pore throat structure of the reservoir.
Description
Technical Field
The utility model relates to a carbon dioxide foam displacement experiment, concretely relates to is used for studying reservoir pore structure device, belongs to the oil field development field.
Background
As the development of oil fields enters the middle and later stages, the heterogeneity of oil layers is increasingly serious, so that water channeling is aggravated, and the oil-water displacement efficiency is seriously influenced. The foam can selectively block a high-permeability channel in the reservoir, and the shear thinning characteristic of the foam enables the apparent viscosity of the foam in a low-permeability layer to be smaller, so that the area for using the low-permeability layer is increased, and the displacement of the high-permeability layer and the low-permeability layer is more uniform. The characteristic of large blocking but small blocking of the foam is beneficial to relieving the problem of unbalanced water absorption profile of the strong heterogeneous reservoir. In addition, the foam also has the characteristics of oil defoaming and water stability, so that the foam has a good control effect on the water-oil fluidity ratio, and is suitable for being applied to old oil fields with higher water content in the later stage of partial water flooding development, and therefore, the research on the carbon dioxide micro seepage is very necessary.
At present, the carbon dioxide foam displacement device can only research the displacement effect of carbon dioxide foam at different injection rates and different gas-liquid ratios, and cannot deeply research the carbon dioxide foam seepage micro mechanism in the porous medium. Consequently to above problem, the utility model provides a carbon dioxide foam drives seepage flow microcosmic device, the device through detecting the change of displacing in-process different positions ground pressure, the research foam is at the microcosmic seepage flow process of pore throat.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a under the high temperature high pressure condition, install 3 multi-range differential pressure meters on the different positions of rock core holder, carry out carbon dioxide foam displacement experiment. The experimental device can conveniently, accurately and efficiently determine the change of pore pressure when the foam meets a throat and a blind end in the pores in the displacement experiment process.
The utility model discloses not enough to prior art exists provides a microcosmic seepage flow experimental apparatus is driven to carbon dioxide foam. A carbon dioxide foam flooding microscopic seepage experiment device is characterized by comprising a carbon dioxide gas cylinder, a carbon dioxide flow regulating valve, a first pressure difference meter, a second pressure difference meter, a third pressure difference meter, a multi-range pressure difference meter, a one-way air outlet valve, a double-cylinder pump, a bubble making machine, a piston container, a ring pressure tracking pump, a rock core holder, a ring pressure relief valve, a thermostat, a back pressure container control valve, a back pressure container, a gas-liquid separator and the like, wherein the carbon dioxide gas cylinder is connected with the multi-range pressure difference meter through a pipeline, and the carbon dioxide flow regulating valve is connected between the carbon dioxide gas cylinder and the multi-range pressure difference meter; the double-cylinder pump is connected with the piston container through a pipeline, and the outlet end of the double-cylinder pump is connected with the one-way air outlet valve; the foaming machine is connected with the piston container through a pipeline, a foaming agent and a surfactant are filled in the foaming machine, and the foaming agent and the surfactant enter the piston container through the pipeline after foaming is finished; the upper part of the core holder is provided with a first pressure difference meter, a second pressure difference meter and a third pressure difference meter, the left side of the third pressure difference meter is connected with the piston container, and the right side of the third pressure difference meter is connected with the back pressure container; the back pressure container is provided with a control valve, the piston container and the rock core holder are both arranged in a constant temperature box, and the air bath is used for heating to truly simulate the formation temperature; the ring pressure tracking pump is connected with the core in a clamping mode through a pipeline, and therefore formation confining pressure borne by the core is truly simulated.
The carbon dioxide foam flooding microscopic seepage experimental device is characterized in that: the foaming machine is connected with the piston container through a pipeline, a foaming agent and a surfactant are filled in the foaming machine, and the foaming agent and the surfactant enter the piston container through the pipeline after foaming is finished.
The utility model has the advantages that:
the utility model adopts the foam maker to be connected with the piston container through the pipeline, the foaming agent and the surfactant are arranged in the foam maker, and the foam maker directly enters the piston container through the pipeline after the foam making is finished, thereby avoiding the influence of defoaming and the like after the foam is generated; a first pressure difference meter, a second pressure difference meter and a third pressure difference meter are arranged on the upper portion of the rock core holder, the pore structure of the rock core is researched whether a blind end or a throat exists or not by measuring the formation pressure at different positions in the displacement process, and safe, effective and accurate data support and technical reference are provided for researching the foam flooding micro seepage.
Drawings
Fig. 1 is a schematic structural view of a carbon dioxide foam flooding micro seepage experimental device.
Description of the main component symbols:
the device comprises a 1-carbon dioxide gas cylinder, a 2-carbon dioxide flow regulating valve, a 3-multi-range pressure difference meter, a 4-one-way air outlet valve, a 5-double-cylinder pump, a 6-bubble making machine, a 7-piston container, an 8-first pressure difference meter, a 9-second pressure difference meter, a 10-third pressure difference meter, an 11-ring pressure relief valve, a 12-ring pressure tracking pump, a 13-rock core holder, a 14-constant temperature box, a 15-back pressure container control valve, a 16-back pressure container, a 17-air outlet valve and an 18-gas-liquid separator.
Detailed Description
The present invention will be further described with reference to the accompanying drawings.
As shown in fig. 1, the carbon dioxide foam flooding microscopic seepage experiment device comprises a carbon dioxide gas cylinder 1, a carbon dioxide gas cylinder 2, a carbon dioxide flow regulating valve 3, a multi-range pressure difference meter 4, a one-way air outlet valve 5, a double-cylinder pump 6, a bubble making machine 7, a piston container 8, a first pressure difference meter 9, a second pressure difference meter 10, a third pressure difference meter 11, a ring pressure relief valve 12, a ring pressure tracking pump 13, a rock core holder 14, a thermostat 15, a back pressure container control valve 16, a back pressure container 17, an air outlet valve 18 and a gas-liquid separator, wherein the carbon dioxide gas cylinder l is connected with the multi-range pressure difference meter 3 through a pipeline, and the carbon dioxide flow regulating valve 2 is connected between the carbon dioxide gas cylinder l and the multi-range pressure difference meter 3; the double-cylinder pump 5 is connected with the piston container 7 through a pipeline, and the outlet end of the double-cylinder pump 5 is connected with the one-way air outlet valve 4; the bubble making machine 6 is connected with the piston container 7 through a pipeline; the foaming machine is internally provided with a foaming agent and a surfactant, and the foaming agent and the surfactant enter the piston container through a pipeline after foaming is finished; the upper part of the core holder 13 is provided with 8 first pressure difference meters, 9 second pressure difference meters and 10 third pressure difference meters, the left side of the core holder 13 is connected with the piston container 7, and the right side of the core holder is connected with the back pressure container 16; the back pressure container 16 is provided with a control valve 15, the piston container 7 and the core holder 13 are both arranged in a constant temperature box 14, and the air bath is used for heating to truly simulate the formation temperature; the ring pressure tracking pump 12 is connected with the core clamp 13 through a pipeline, and therefore formation confining pressure borne by the core is simulated really.
The utility model discloses when carrying out carbon dioxide foam and driving, mainly include following step:
(1) the left side of the core holder 13 is connected with a three-way valve, a piston container 7, a carbon dioxide high-pressure gas cylinder 1 and a pressure gauge 3 (0-4 MPa, the precision is 0.02MPa), the right side of the core holder 13 is connected with an outlet gas-liquid separator 18, the upper side of the core holder 13 is connected with 8 first pressure difference meters, 9 second pressure difference meters, 10 third pressure difference meters and the lower side is connected with an annular pressure automatic tracking pump 12.
(2) The lower end of the piston container 7 is connected with a double-cylinder constant-speed constant-pressure pump 5, the left side of the piston container is connected with a bubble making machine 6, and a constant-flow or constant-pressure mode is selected for displacement.
(3) After the connection is completed, the core holder 13 is filled with the rock sample, and the unfilled portion of the holder 13 is plugged with a core plug.
(4) And starting the ring pressure automatic tracking pump 12, driving the confining pressure of the core holder 13 to be 5MPa, keeping the pressure difference with the core displacement to be more than 3MPa, turning on a liquid discharge port at the upper end of the core holder 13, and discharging air in the core holder 13.
(5) The experimental scheme of gas-liquid simultaneous injection is adopted. Starting a water drive experiment scheme, starting the double-cylinder constant-speed constant-pressure pump 5 to select a constant-pressure mode until the liquid flow at the outlet end of the core holder 13 is stable, and recording the displacement pressure difference P at two ends of the water drive core holder 13
1。
(6) According to the experiment scheme of core injection, the micro-foam displacement experiment scheme is started, a foaming mode is started in a foaming machine 6, a double-cylinder constant-speed constant-pressure pump 5 is started to select a constant-pressure mode, a carbon dioxide high-pressure gas cylinder 1 is opened, the outlet pressure of the gas cylinder is adjusted to be 1.5MPa, the double-cylinder pump 5 is adjusted to be in the constant-pressure mode, the micro-foam injection rate is 1.8ml/min, and carbon dioxide high-pressure gas and foaming agent solution are started to be pumped into a core holder 13 at the same time.
(7) Recording the values P of 8 first pressure difference tables, 9 second pressure difference tables and 10 third pressure difference tables in the displacement process
2And recording the pressure difference P between the two ends of the micro-foam displacement rock core at the moment
3。
(8) Repeating the step (5), and performing water drive again until no foam flows out at the outlet end of the core holder 13, the liquid flow is stable, and the pressure difference between two ends of the core holder 13 is recorded as P
4。
(9) And (3) closing the carbon dioxide gas bottle 1, closing the constant temperature box 14, discharging the pressure in the ring pressure tracking pump 12, and opening the vent valve 17 to discharge the gas in the pipeline after the experiment is finished.
Claims (2)
1. A carbon dioxide foam flooding microscopic seepage experiment device is characterized by comprising a carbon dioxide gas cylinder, a carbon dioxide flow regulating valve, a multi-range pressure difference meter, a one-way air outlet valve, a double-cylinder pump, a bubble making machine, a piston container, a ring pressure tracking pump, a rock core holder, a ring pressure relief valve, a constant temperature box, a back pressure container control valve, a back pressure container, a gas-liquid separator and the like, wherein the carbon dioxide gas cylinder (l) is connected with the multi-range pressure difference meter (3) through a pipeline, and the carbon dioxide flow regulating valve (2) is connected between the carbon dioxide gas cylinder (l) and the multi-range pressure difference meter (3); the outlet end of the double-cylinder pump (5) is connected with a one-way air outlet valve (4); the foaming machine (6) is connected with the piston container (7) through a pipeline, a foaming agent and a surfactant are filled in the foaming machine, and the foaming agent and the surfactant enter the piston container through the pipeline after foaming is finished; a first pressure difference meter (8), a second pressure difference meter (9) and a third pressure difference meter (10) are arranged on the core holder (13), formation pressures at different positions in the carbon dioxide foam displacement process are measured, the left side of the core holder is connected with the piston container (7), and the right side of the core holder is connected with the back pressure container (16); the back pressure container (16) is provided with a control valve, the piston container (7) and the rock core holder (13) are both arranged in a constant temperature box (14), and the air bath is used for heating to truly simulate the formation temperature; the ring pressure tracking pump (12) is connected with the rock core holder (13) through a pipeline, and therefore formation confining pressure borne by the rock core is truly simulated.
2. The carbon dioxide foam flooding microscopic seepage experimental device according to claim 1, characterized in that: the foaming machine (6) is filled with a foaming agent and a surfactant, and the foaming agent and the surfactant enter the piston container (7) through a pipeline after foaming is finished.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920525161.0U CN210051671U (en) | 2019-04-18 | 2019-04-18 | Carbon dioxide foam drives microcosmic seepage flow experimental apparatus |
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| CN201920525161.0U CN210051671U (en) | 2019-04-18 | 2019-04-18 | Carbon dioxide foam drives microcosmic seepage flow experimental apparatus |
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| CN210051671U true CN210051671U (en) | 2020-02-11 |
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| CN201920525161.0U Expired - Fee Related CN210051671U (en) | 2019-04-18 | 2019-04-18 | Carbon dioxide foam drives microcosmic seepage flow experimental apparatus |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109916801A (en) * | 2019-04-18 | 2019-06-21 | 西南石油大学 | A kind of carbon dioxide foaming drive microscopic seepage experimental method |
| CN111720110A (en) * | 2020-06-30 | 2020-09-29 | 重庆科技学院 | Pressure automatic tracking control gas well production simulation yield control device and method |
| CN114755147A (en) * | 2021-01-08 | 2022-07-15 | 中国石油天然气股份有限公司 | Device, system and method for measuring oil displacement performance of surfactant |
-
2019
- 2019-04-18 CN CN201920525161.0U patent/CN210051671U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109916801A (en) * | 2019-04-18 | 2019-06-21 | 西南石油大学 | A kind of carbon dioxide foaming drive microscopic seepage experimental method |
| CN111720110A (en) * | 2020-06-30 | 2020-09-29 | 重庆科技学院 | Pressure automatic tracking control gas well production simulation yield control device and method |
| CN114755147A (en) * | 2021-01-08 | 2022-07-15 | 中国石油天然气股份有限公司 | Device, system and method for measuring oil displacement performance of surfactant |
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