Indoor foam generation and evaluation device
By designing indoor foam generation and evaluation devices with integrated foam generation, evaluation and displacement functions, the problem of easy interference in the test process and low evaluation accuracy in the prior art is solved, and more efficient and accurate foam evaluation is achieved.
Patent Information
- Application Number
- CN202323610360.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-28
- Publication Date
- 2025-02-11
- Estimated Expiration
- 2033-12-28
AI Technical Summary
The prior art lacks a device that integrates bubble generation, evaluation and displacement, which leads to the test process being easily disturbed by environmental and human factors, and the evaluation accuracy is reduced.
Design an indoor foam generation and evaluation device, including a foam generator, injection assembly, simulation module and displacement module. The foam generator generates foam by mixing and stirring test gas and liquid. The simulation module simulates the formation temperature and pressure conditions. The displacement module is used to conduct foam displacement simulation tests on cores or slabs.
The integration of foam generation, evaluation and displacement is achieved, the efficiency of indoor foam generation and evaluation is improved, the influence of artificial and environmental factors is reduced, and the accuracy of evaluation is improved.
Smart Images
Figure CN222461403U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of oilfield development tests, and in particular relates to an indoor foam generation and evaluation device. Background Art
[0002] When the oil field development enters the middle and late stages, the bottom water cone advances significantly and the water content rises rapidly, making it more difficult to maintain stable production in the oil field. The application of foam liquids gradually increases, such as foam acidification, foam fracturing, foam well washing, foam sand flushing, foam well killing, etc. Therefore, foam generation, evaluation and displacement tests are required to ensure stable production in the middle and late stages of the oil field. The equipment required for the test should be able to produce a lot of high-quality foams and simulate formation pressure and temperature conditions according to the displacement mechanism and similar principles, thereby providing experimental technical support for the development of bottom water reservoirs.
[0003] There are foam generation, evaluation and displacement methods in the prior art, but usually the foam generation, evaluation and displacement tests are carried out separately. There is no device that integrates foam generation, evaluation and displacement. It is easy to be disturbed by environmental factors and human factors during the test, resulting in reduced evaluation accuracy. Therefore, there is an urgent need for a device that integrates foam generation, evaluation and displacement, so that foam generation and foam flooding evaluation can be carried out based on the designed model device. Utility Model Content
[0004] One purpose of the utility model is to provide an indoor foam generation and evaluation device, so as to improve the efficiency of indoor foam generation and evaluation, reduce the influence of human factors and environmental factors, and improve the evaluation accuracy by integrating foam generation, evaluation and displacement.
[0005] According to the utility model, an indoor foam generation and evaluation device is provided, including a foam generator and an injection assembly connected to the inlet end of the foam generator, the injection assembly is used to inject a test gas and a test liquid capable of generating foam into the foam generator respectively, the foam generator is used to generate foam therein by mixing and stirring the test gas and the test liquid, the device also includes a simulation module connected to the outlet end of the foam generator and a displacement module connected to the simulation module, the simulation module is used to increase the temperature and pressure of the foam from the foam generator to simulate the temperature and pressure conditions of the formation, and the displacement module is used to perform a foam displacement simulation test on a core or a rock slab.
[0006] In a preferred embodiment, the foam generator includes a motor and a magnetic stirrer connected to the motor. The stirring end of the magnetic stirrer is arranged in the foam generating chamber and can rotate to form a stirring vortex.
[0007] In a preferred embodiment, a gas inlet pipe and a liquid inlet pipe are provided at the bottom end of the foam generating chamber, the gas inlet pipe and the liquid inlet pipe are arranged opposite to each other, and the gas inlet pipe and the liquid inlet pipe have a gas inlet and a liquid inlet at the end respectively, the gas inlet and the liquid inlet are arranged opposite to each other, and both the test gas and the test liquid can enter the foam generating chamber in a swirling manner along the tangential direction of the stirring vortex.
[0008] In a preferred embodiment, a plurality of parallel trays are arranged above the foam generating chamber, and the mesh number of each tray increases gradually from bottom to top.
[0009] In a preferred embodiment, a viewing window is provided below the foam generator.
[0010] In a preferred embodiment, the window has a window glass made of artificial sapphire.
[0011] In a preferred embodiment, the injection assembly includes an air storage tank, a liquid storage tank, a first pipe connecting the air storage tank, the liquid storage tank and the foam generator, and a branch pipe connected in parallel with the first pipe, the first end of the branch pipe is connected to the first pipe, and the second end of the branch pipe is connected to the foam generator.
[0012] In a preferred embodiment, the first pipeline is provided with one or more of a pressure reducing valve, a flow controller, a pressure gauge, an air compressor, and a constant pressure and constant speed pump.
[0013] In a preferred embodiment, the displacement module includes a clamp that clamps the core or rock plate, a back-pressure pump, an oil, gas and water meter, a back-pressure container and a back-pressure valve. The other end of the clamp is connected to the oil, gas and water meter through a second pipeline, the back-pressure valve is arranged on the second pipeline, and the back-pressure pump is connected to the back-pressure valve through the back-pressure container.
[0014] In a preferred embodiment, the indoor foam generation and evaluation device further comprises an annular pressure pump, and the holder is connected to the annular pressure pump via a third pipeline.
[0015] The utility model has at least the following technical effects:
[0016] The utility model comprises a foam generator and an injection assembly connected to the inlet end of the foam generator, and the injection assembly is used for respectively injecting a test gas and a test liquid capable of generating foam into the foam generator, the foam generator is used for mixing and stirring the test gas and the test liquid to generate foam therein, the device also comprises a simulation module connected to the outlet end of the foam generator and a displacement module connected to the simulation module, the simulation module is used for increasing the temperature and pressure of the foam from the foam generator to simulate the temperature and pressure conditions of the formation, and the displacement module is used for performing a foam displacement simulation test on a core or a rock plate, and can integrate foam generation, evaluation and foam displacement evaluation, improve the efficiency of indoor foam generation and evaluation, reduce the influence of human factors and environmental factors, and improve the evaluation accuracy.
[0017] The utility model allows both gaseous nitrogen or carbon dioxide and liquid nitrogen or carbon dioxide to enter the foam generating chamber in a swirling manner along the tangential direction of the stirring vortex, thereby forming a mixed swirling flow by utilizing the swirling flow formed tangentially to the gas and liquid, and generating a uniform and stable foam fluid under high-speed cutting at the stirring end.
[0018] The utility model has a plurality of parallel tower plates arranged above the foam generating unit, and the mesh number of each tower plate gradually increases from bottom to top, so that the generated foam can be squeezed through the tower plates with pore sizes from coarse to fine, so that the foam is transformed into micro foam of the same order of magnitude as the core pore size, which facilitates the foam to enter the core pore throat. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 The overall structure diagram of the indoor foam generation and evaluation device according to one embodiment of the utility model is schematically shown;
[0020] Figure 2 The schematic diagram shows the structure of a foam generator according to an embodiment of the utility model.
[0021] In the present application, all drawings are schematic drawings, which are only used to illustrate the principles of the present utility model and are not drawn according to the actual scale. DETAILED DESCRIPTION
[0022] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0023] In the present invention, unless otherwise clearly specified and limited, the term "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0024] like Figure 1 As shown, the indoor foam generation and evaluation device 100 described in the utility model includes a foam generator 1 and an injection assembly connected to the inlet end of the foam generator 1, the injection assembly is used to inject the test gas and test liquid that can generate foam into the foam generator 1 respectively, the foam generator 1 is used to mix and stir the test gas and test liquid to generate foam therein, the indoor foam generation and evaluation device 100 also includes a simulation module 2 connected to the outlet end of the foam generator 1 and a displacement module 3 connected to the simulation module 2 through a pipeline, the simulation module 2 is used to increase the temperature and pressure of the foam from the foam generator 1 to simulate the temperature and pressure conditions of the formation, so as to evaluate the stability of the foam under formation conditions and screen the foaming agent, the displacement module 3 is used to perform foam displacement simulation tests on cores or rock plates, so as to study the mechanism and technical adaptability of foam for improving the recovery rate under reservoir conditions.
[0025] The utility model comprises a foam generator 1 and an injection assembly connected to the inlet end of the foam generator 1, and the injection assembly is used to inject a test gas and a test liquid capable of generating foam into the foam generator 1 respectively; the foam generator 1 is used to generate foam therein by mixing and stirring the test gas and the test liquid; the device 100 also comprises a simulation module 2 connected to the outlet end of the foam generator 1 and a displacement module 3 connected to the simulation module 2; the simulation module 2 is used to increase the temperature and pressure of the foam from the foam generator 1 to simulate the temperature and pressure conditions of the formation; the displacement module 3 is used to perform a foam displacement simulation test on a core or a rock plate, and can integrate foam generation, evaluation and foam displacement evaluation, improve the efficiency of indoor foam generation and evaluation, reduce the influence of human factors and environmental factors, and improve the accuracy of evaluation.
[0026] In one or more embodiments, the test gas may be carbon dioxide or nitrogen, and the test liquid may be liquid carbon dioxide or liquid nitrogen.
[0027] In one or more embodiments, the injection assembly includes an air storage tank 21, a liquid storage tank 22, and a first pipe a connecting the air storage tank 21, the liquid storage tank 22 and the foam generator 1, the first pipe a is provided with one or more of a pressure reducing valve, a flow controller, a pressure gauge, an air compressor, and a constant pressure and constant speed pump, and also includes a branch pipe b connected in parallel with the first pipe a, the first end of the branch pipe b is connected to the first pipe a, and the second end of the branch pipe b is connected to the foam generator 1, for delivering one of the test gas and the test liquid to the foam generator 1, and the first pipe a is used to deliver the other to the foam generator 1.
[0028] In one or more embodiments, the injection assembly further includes a gas-liquid ratio injection control unit disposed on the first pipeline a, for controlling the injection of the test gas and the test liquid into the foam generator 1 in a certain ratio.
[0029] In one or more embodiments, the pressure in the foam generator is 40 MPa, and the stirring speed is adjustable within the range of 0-1000 r / min.
[0030] like Figure 2 As shown, in one or more embodiments, the foam generator 1 includes a motor 11 and a magnetic stirrer connected to the motor 11, the stirring end 13 of the magnetic stirrer is arranged in the foam generating chamber 12, and is configured as a fan blade, and the motor 11 drives the stirring end 13 of the magnetic stirrer to rotate in the foam generating chamber 12 to form a stirring vortex. A gas inlet pipe 121 and a liquid inlet pipe 122 are arranged at the bottom end of the foam generating chamber 12, and the gas inlet pipe 121 and the liquid inlet pipe 122 are arranged oppositely, and the gas inlet pipe 121 and the liquid inlet pipe 122 have a gas inlet and a liquid inlet at the end respectively, and the gas inlet and the liquid inlet are arranged oppositely, wherein the gaseous nitrogen or carbon dioxide and the liquid nitrogen or carbon dioxide can enter the foam generating chamber in a swirling manner along the tangential direction of the stirring vortex, so that the swirling flow formed by the gas-liquid tangential direction can be used to form a mixed swirling flow, and under the high-speed cutting of the fan blade-shaped stirring end, a uniform and stable foam fluid can be generated.
[0031] In one or more embodiments, a plurality of parallel plates 14 are provided above the foam generating unit 12, and the mesh size of each plate 14 gradually increases from bottom to top, so that the generated foam can be squeezed through the plates 14 with pore sizes from coarse to fine, so that the foam is transformed into micro-foam of the same order of magnitude as the core pore size, thereby facilitating the foam to enter the core pore throat.
[0032] In one or more embodiments, a viewing window is provided below the foam generator 1 to facilitate the formation of foam and observation of the formation of foam, and to facilitate observation of the stability of the foam formed at different stirring speeds after the stirring is stopped, so as to facilitate stability evaluation thereof.
[0033] In one or more embodiments, the viewing window has a viewing window glass made of artificial sapphire, and the foam quality is observed through the viewing window. A camera connected to a computer for communication is also provided in the foam generating chamber 12 of the foam generator 1, and the camera can monitor the foam state in the foam generating chamber 12 in real time and send it to the computer in real time.
[0034] In one or more embodiments, the displacement module 3 includes a clamp 31 for clamping a core or a rock plate, a back pressure pump 33, an oil, gas and water meter 34, a back pressure container 35 and a back pressure valve 32. The other end of the clamp 31 is connected to the oil, gas and water meter 34 through a second pipeline c. A back pressure valve 32 is provided on the second pipeline c, and the back pressure pump 33 is connected to the back pressure valve 32 through the back pressure container 34.
[0035] The utility model can conduct experimental gas foam displacement simulation tests on cores or rock plates through the displacement module 3 and its included clamp 31 for clamping cores or rock plates, back pressure pump 33, oil, gas and water meter 34, back pressure container 35 and back pressure valve 32, study the mechanism of foam to improve recovery rate under reservoir conditions, technical adaptability (for example, permeability, crude oil viscosity, development stage, etc.), optimize process parameters (for example, displacement speed, gas-liquid ratio, segment plug design), and conduct system screening and evaluation.
[0036] In one or more embodiments, the indoor foam generation and evaluation device 100 of the present invention further includes an annular pressure pump 36 , and the holder 31 is connected to the annular pressure pump 36 via a third pipe d.
[0037] In one or more embodiments, the back-pressure pump 33 and the annular pressure pump 36 are respectively connected to a computer for communication, and the computer can automatically control the pumping pressures of the back-pressure pump 33 and the annular pressure pump 36 .
[0038] Although the present invention has been described with reference to preferred embodiments, various modifications may be made thereto and parts thereof may be replaced with equivalents without departing from the scope of the present invention. In particular, the various technical features mentioned in the various embodiments may be combined in any manner as long as there is no structural conflict. The present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.
Claims
1. An indoor foam generation and evaluation device, characterized in that: The invention comprises an injection assembly connected to a foam generator and an inlet end of the foam generator, wherein the injection assembly is used to inject a test gas and a test liquid capable of generating foam into the foam generator respectively, and the foam generator is used to generate foam therein by mixing and stirring the test gas and the test liquid. The device also includes a simulation module connected to the outlet end of the foam generator and a displacement module connected to the simulation module. The simulation module is used to increase the temperature and pressure of the foam from the foam generator to simulate the temperature and pressure conditions of the formation, and the displacement module is used to perform foam displacement simulation tests on rock cores or rock slabs.
2. The indoor foam generation and evaluation device according to claim 1, characterized in that: The foam generator comprises a motor and a magnetic stirrer connected to the motor. The stirring end of the magnetic stirrer is arranged in the foam generating chamber and can rotate to form a stirring vortex.
3. The indoor foam generation and evaluation device according to claim 2, characterized in that: A gas inlet pipe and a liquid inlet pipe are arranged at the bottom end of the foam generating chamber, and the gas inlet pipe and the liquid inlet pipe are arranged opposite to each other. The gas inlet pipe and the liquid inlet pipe have a gas inlet and a liquid inlet at the end respectively, and the gas inlet and the liquid inlet are arranged opposite to each other. The test gas and the test liquid can enter the foam generating chamber in a swirling manner along the tangential direction of the stirring vortex.
4. The indoor foam generation and evaluation device according to claim 3, characterized in that: A plurality of parallel tower plates are arranged above the foam generating chamber, and the mesh number of each tower plate increases gradually from bottom to top.
5. The indoor foam generation and evaluation device according to claim 1, characterized in that: A viewing window is arranged below the foam generator.
6. The indoor foam generation and evaluation device according to claim 5, characterized in that: The window has a window glass made of artificial sapphire.
7. The indoor foam generation and evaluation device according to claim 1, characterized in that: The injection assembly includes an air storage tank, a liquid storage tank, a first pipe connecting the air storage tank, the liquid storage tank and the foam generator, and a branch pipe connected in parallel with the first pipe, wherein the first end of the branch pipe is connected to the first pipe, and the second end of the branch pipe is connected to the foam generator.
8. The indoor foam generation and evaluation device according to claim 7, characterized in that: The first pipeline is provided with one or more of a pressure reducing valve, a flow controller, a pressure gauge, an air compressor, and a constant pressure and constant speed pump.
9. The indoor foam generation and evaluation device according to claim 8, characterized in that: The displacement module includes a clamp that clamps the core or rock plate, a back-pressure pump, an oil, gas and water meter, a back-pressure container and a back-pressure valve. The other end of the clamp is connected to the oil, gas and water meter through a second pipeline. The back-pressure valve is arranged on the second pipeline, and the back-pressure pump is connected to the back-pressure valve through the back-pressure container.
10. The indoor foam generation and evaluation device according to claim 9, characterized in that: It also includes an annular pressure pump, and the clamp is connected to the annular pressure pump through a third pipeline.