CN210483680U - Foam oil rheology evaluation device in gas flooding oil recovery - Google Patents
Foam oil rheology evaluation device in gas flooding oil recovery Download PDFInfo
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- CN210483680U CN210483680U CN201921590727.4U CN201921590727U CN210483680U CN 210483680 U CN210483680 U CN 210483680U CN 201921590727 U CN201921590727 U CN 201921590727U CN 210483680 U CN210483680 U CN 210483680U
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Abstract
The utility model discloses a foam oil rheology evaluation device in gas drive oil recovery adopts the peristaltic pump to combine high-pressure tank preparation and drive to dissolve gas crude oil, does not have easy trouble parts such as piston, simple structure stable performance. A bypass pipeline of the foam generator is arranged, and can be switched and selected in two modes of natural foam precipitation and artificial foam particle size quantification according to research contents. Safety valves are arranged at the outlet of the peristaltic pump and the top of the high-pressure tank, so that overpressure of equipment can be avoided, and the safety of the system is improved. The measuring cylinder is arranged at the tail of the pipeline, so that the height of the foam oil can be measured in real time, and the foam can be quantized. The pressure reducer can be arranged to set a pressure drop value, and the function of controlling the pressure drop of the fluid is realized. Compared with the existing foam oil rheological experimental device, the device has the characteristics of spanning of the foam generator, controllable pressure drop, quantifiable foam, accurate measurement, stable equipment performance and high safety.
Description
Technical Field
The utility model belongs to the technical field of the crude oil rheology, especially, relate to a foam oil rheology evaluation device in gas drive oil recovery.
Background
In recent years, due to the high development cost of heavy oil thermal recovery and the limitation of reservoir adaptability, the related technology for developing heavy oil by using dissolved gas flooding is successfully applied in Venezuela and Canada, and achieves good development effect. When the formation pressure of the oil reservoirs is lower than the bubble point pressure, the gas-oil ratio is not rapidly increased but is kept low, the pressure drop speed is slow, and the recovery ratio exceeds 10 percent. The wellhead oil samples of the oil reservoirs are in a gas-in-oil foam state, the seepage characteristics are very complex, and many scholars consider that the gas-in-oil foam state is one of the reasons for the good development effect of the dissolved gas flooding, and the gas-in-oil dispersion system is called as 'foam oil', and the heavy oil cold production development mode is also called as foam oil dissolved gas flooding. The conventional dissolved gas flooding has the main characteristics that: when the pressure of the oil reservoir is lower than the bubble point pressure, gas is separated out to quickly form a continuous phase, the gas-oil ratio for production is increased quickly, the pressure of the oil reservoir is decreased quickly, and the recovery ratio is lower. In the foam oil dissolved gas flooding, when the pressure is reduced to the bubble point pressure, the dissolved gas is separated from the crude oil to form tiny bubbles, the tiny bubbles are influenced by the viscosity of the crude oil and the operation condition, the tiny bubbles are retained in the crude oil, do not coalesce to form a continuous gas phase, are dispersed in the crude oil and flow along with the crude oil to form a foam oil seepage state, and because the gas is a dispersed phase, the gas-oil ratio produced in the foam oil dissolved gas flooding development process is kept low, the oil reservoir pressure is reduced slowly, and the recovery ratio is higher. At present, research aiming at foam oil dissolved gas flooding covers various aspects such as foam oil basic physical properties, foam oil dissolved gas flooding physical simulation, foam oil dissolved gas flooding mathematical models, foam oil dissolved gas flooding mine application and the like. Different learners have put forward different knowledge in all aspects, but the knowledge is to be further studied, so as to perfect the foam oil dissolved gas flooding theoretical system. The gas in the foam oil is dispersed in the oil phase in the form of small highly dispersed bubbles to form an oil-in-gas dispersion system, so that the rheological property of the foam oil is very complex and the influence factors are very many. Therefore, a foam oil rheological evaluation device is necessary to be developed, and the deep research is carried out from the aspect of indoor experiments to perfect the foam oil rheological theory.
In order to measure the rheological property of the foam oil, the Luteng et al provides a rheological property experimental device of the foam oil (Luteng, Limegamin, Lipinbergite, et al. rheological property of the foam oil and the influence factor experiment [ J ]. Petroleum institute, 2013,34(5): 1004-. The device adopts a pump to inject water to the lower part of the oil sample cylinder, the piston is pushed to drive the dissolved crude oil to flow, the foam generator enables the dissolved crude oil to generate foam, and the differential pressure sensor is adopted to measure the differential pressure. The main problem is that the piston in the oil sample cylinder is easy to have the situation of untight sealing, which may cause water at the lower part of the oil sample cylinder to permeate into the gas-dissolved crude oil space at the upper part through a gap, thereby affecting the test result. The pressure reducer is not arranged on the device pipeline, so that the pressure of the foam oil can not be controlled. The dissolved crude oil must pass through the foam oil generator, and the gas is artificially cut into micro-bubbles with certain grain diameter, which is not the same as the situation in an actual pipeline. The device is not provided with safety facilities, and safety accidents can occur when the pressure exceeds the limit due to misoperation. Only the produced liquid collecting device is arranged, and the amount of foam in the foam oil cannot be quantified.
Disclosure of Invention
In order to overcome the defects of the prior art, the utility model aims at providing a foam oil rheology evaluation device in gas drive oil recovery that foam generator can stride across, the pressure drop is controllable, the foam is quantifiable, measure accurate, the equipment stable performance, the security is high.
The utility model discloses a peristaltic pump combines high-pressure tank preparation and drive to dissolve gas crude oil, does not have easy trouble parts such as piston, and simple structure stable performance. A bypass pipeline of the foam generator is arranged, and can be switched and selected in two modes of natural foam precipitation and artificial foam particle size quantification according to research contents. Safety valves are arranged at the outlet of the peristaltic pump and the top of the high-pressure tank, so that overpressure of equipment can be avoided, and the safety of the system is improved. The measuring cylinder is arranged at the tail of the pipeline, so that the height of the foam oil can be measured in real time, and the foam can be quantized. The pressure reducer can be arranged to set a pressure drop value, and the function of controlling the pressure drop of the fluid is realized.
The utility model discloses specific technical scheme as follows:
a testing device for flow characteristics of gas-liquid two-phase flow comprises a high-pressure gas cylinder, a pressure reducing valve, a needle valve, a dryer, a check valve, a first safety valve, an electric stirrer, a first pressure sensor, a first temperature sensor, a high-pressure tank, a first water bath, a first ball valve, a second ball valve, a peristaltic pump, a second safety valve, a mass flowmeter, a pressure reducer, a third ball valve, a foam generator, a fourth ball valve, a fifth ball valve, a second water bath, a testing pipeline, a second pressure sensor, a second temperature sensor, a third pressure sensor, a third temperature sensor, a fourth pressure sensor, a fourth temperature sensor, a back pressure valve and a measuring cylinder; the pressure reducing valve is connected with the high-pressure gas cylinder; the needle valve is connected with the pressure reducing valve; the dryer is connected with the needle valve; one end of the check valve is connected with the dryer, and the other end of the check valve is connected with the high-pressure tank; the first safety valve is connected with the top of the high-pressure tank; an electric stirrer is arranged at the top of the high-pressure tank; the top of the electric stirrer is respectively provided with a first pressure sensor and a first temperature sensor; the first ball valve is connected with the bottom of the high-pressure tank; a pipeline between the ball valve I and the high-pressure tank is connected with a ball valve II; one end of the peristaltic pump is connected with the second ball valve, and the other end of the peristaltic pump is connected with the mass flow meter; the pressure reducer is connected with the mass flow meter; the foam generator is connected with the ball valve III; the ball valve IV is connected with the foam generator; one end of the back pressure valve is connected with the test pipeline, and the other end of the back pressure valve is connected with the measuring cylinder.
A second pressure sensor, a second temperature sensor, a third pressure sensor, a third temperature sensor, a fourth pressure sensor and a fourth temperature sensor are distributed along the test pipeline.
And the test pipeline is arranged in a water bath II.
And a pipeline between the peristaltic pump and the mass flow meter is connected with a second safety valve.
The outlet of the pressure reducer is divided into two pipelines, one pipeline is connected with the ball valve III, and the other pipeline is connected with the ball valve V.
And the pipeline where the ball valve IV and the ball valve V are positioned is combined and then is connected with the testing pipeline.
Compared with the prior art, the invention has the following beneficial effects:
(1) the peristaltic pump is combined with the high-pressure tank to prepare and drive the dissolved crude oil, so that the components which are easy to fail such as pistons are not present, the structure is simple, and the performance is stable.
(2) A bypass pipeline of the foam generator is arranged, and can be switched and selected in two modes of natural foam precipitation and artificial foam particle size quantification according to research contents.
(3) Safety valves are arranged at the outlet of the peristaltic pump and the top of the high-pressure tank, so that overpressure of equipment can be avoided, and the safety of the system is improved.
(4) The measuring cylinder is arranged at the tail of the pipeline, so that the height of the foam oil can be measured in real time, and the foam can be quantized.
(5) The pressure reducer can be arranged to set a pressure drop value, and the function of controlling the pressure drop of the fluid is realized.
(6) The device has the characteristics of spanning of the foam generator, controllable pressure drop, quantifiable foam, accurate measurement, stable equipment performance and high safety.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
In the figure: 1-a high-pressure gas cylinder; 2-a pressure reducing valve; 3-needle valve; 4-a dryer; 5-a check valve; 6, a first safety valve; 7-an electric stirrer; 8, a first pressure sensor; 9-a temperature sensor I; 10-high pressure tank; 11, carrying out water bath I; 12-ball valve one; 13-ball valve two; 14-a peristaltic pump; 15-safety valve II; 16-a mass flow meter; 17-a pressure reducer; 18-ball valve III; 19-a foam generator; 20-ball valve four; 21-ball valve five; 22-water bath II; 23-testing the pipeline; 24-pressure sensor two; 25-temperature sensor two; 26-pressure sensor three; 27-temperature sensor three; 28-pressure sensor four; 29-temperature sensor four; 30-a back pressure valve; 31-measuring cylinder.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings by way of specific embodiments. The following is a more detailed description of the present invention taken in conjunction with specific preferred embodiments, and it is not intended that the present invention be limited to the specific embodiments described herein. For those skilled in the art, without departing from the spirit of the present invention, several simple deductions or substitutions may be made, which should be considered as belonging to the protection scope of the present invention.
As shown in fig. 1, the utility model discloses a high-pressure gas cylinder 1, relief pressure valve 2, needle valve 3, desicator 4, check valve 5, relief valve 6, electric mixer 7, pressure sensor 8, temperature sensor 9, high-pressure tank 10, water bath 11, ball valve 12, ball valve 13, peristaltic pump 14, relief valve 15, mass flow meter 16, step-down transformer 17, three 18 of ball valve, foam generator 19, four 20 of ball valve, five 21 of ball valve, two 22 of water bath, test tube 23, two 24 of pressure sensor, two 25 of temperature sensor, three 26 of pressure sensor, three 27 of temperature sensor, four 28 of pressure sensor, four 29 of temperature sensor, backpressure valve 30, graduated flask 31. The pressure reducing valve 2 is connected with the high-pressure gas bottle 1 and used for controlling gas pressure. The needle valve 3 is connected with the pressure reducing valve 2 and used for controlling the flow of gas. The dryer 4 is connected to the needle valve 3 to remove moisture from the gas. The check valve 5 is connected to the dryer 4 to prevent the backflow of fluid. The check valve 5 is connected to the top of the high-pressure tank 10. And a safety valve I6 is arranged at the top of the high-pressure tank 10 to prevent the pressure in the high-pressure tank 10 from being over-pressurized. And the top of the high-pressure tank 10 is provided with an electric stirrer 7 for stirring and accelerating gas-liquid mixing. And the top of the high-pressure tank 10 is provided with a first pressure sensor 8 and a first temperature sensor 9 which are used for measuring temperature and pressure data in the high-pressure tank 10. And a high-pressure tank 10 is arranged in the first water bath 11, and the temperature of fluid in the high-pressure tank 10 can be controlled. The first ball valve 12 is connected to the bottom of the high-pressure tank 10 and is used for emptying the fluid in the high-pressure tank 10. And a pipeline between the first ball valve 12 and the high-pressure tank 10 is connected with a second ball valve 13. And the peristaltic pump 14 is connected with the second ball valve 13 and is used for driving the dissolved crude oil to flow. The mass flow meter 16 is connected with the peristaltic pump 14 and is used for metering the flow of the dissolved crude oil. And a pipeline between the mass flow meter 16 and the peristaltic pump 14 is connected with a second safety valve 15. The second safety valve 15 is provided with a pressure limit value, so that overpressure of the pipeline can be prevented. The pressure reducer 17 is connected with the mass flow meter 16 and can control the pressure drop value of the fluid. The outlet of the pressure reducer 17 is divided into two parallel pipelines, one pipeline is connected with the third ball valve 18, and the other end of the pipeline is connected with the fifth ball valve 21. And one end of the foam generator 19 is connected with the third ball valve 18, and the other end of the foam generator is connected with the fourth ball valve 20. And the pipelines in which the fourth ball valve 20 and the fifth ball valve 21 are positioned are combined into one pipeline and then are connected with the testing pipeline 23. The second pressure sensor 24, the second temperature sensor 25, the third pressure sensor 26, the third temperature sensor 27, the fourth pressure sensor 28 and the fourth temperature sensor 29 are arranged along the test pipeline 23 and used for collecting temperature and pressure data of the fluid along the test pipeline. And a test pipeline 23 is arranged in the second water bath 22, and the temperature in the test pipeline 23 can be controlled. The back pressure valve 30 is connected to the test line 23 and controls the pressure in the connection of the test line 23. The measuring cylinder 31 is connected with the back pressure valve 30 and is used for measuring the height of the foam oil, so that the foam can be quantified.
The specific operation process of the utility model is explained as follows:
preparing dissolved gas crude oil: all valves are closed. A certain amount of crude oil is injected into the high-pressure tank 10. The pressure value of the pressure reducing valve 2 is set, the needle valve 3 is opened, and a predetermined amount of gas is injected into the high-pressure tank 10. And starting the first water bath 11 and the electric stirrer 7 to stir, mix and heat the gas-liquid fluid in the high-pressure tank 10. And (5) observing the numerical values of the first pressure sensor 8 and the first temperature sensor 9, and finishing the preparation of the dissolved crude oil after the temperature and the pressure are stable and unchanged.
Foam oil rheology test under natural foam evolution: all valves are closed. The second water bath 22 was started and the temperature of the test line 23 was heated to the experimental temperature. And setting pressure values of a back pressure valve 30 and a pressure reducer 17, opening a second ball valve 13 and a fifth ball valve 21, starting a peristaltic pump 14, and pumping the dissolved crude oil into a test pipeline 23. The pressure of the gas-dissolved crude oil is reduced under the action of the pressure reducer 17, gas is separated out from the gas-dissolved crude oil to naturally form foam oil, and the foam oil flows into the test pipeline 23 through the pipeline where the five ball valves 21 are located. In the flowing process, the mass flow meter 16, the second pressure sensor 24, the second temperature sensor 25, the third pressure sensor 26, the third temperature sensor 27, the fourth pressure sensor 28 and the fourth temperature sensor 29 are used for collecting flowing data of the fluid, and a measuring cylinder 31 is used for measuring height data of the foam oil.
Foam oil rheology test with artificial quantification of foam particle size: all valves are closed. The second water bath 22 was started and the temperature of the test line 23 was heated to the experimental temperature. And setting pressure values of a back pressure valve 30 and a pressure reducer 17, opening a second ball valve 13, a third ball valve 18 and a fourth ball valve 20, starting a peristaltic pump 14, and pumping the dissolved crude oil into a test pipeline 23. The pressure of the dissolved crude oil is reduced under the action of the pressure reducer 17 to separate out gas, the foam oil flows into a test pipeline 23 through pipelines where the third ball valve 18, the foam generator 19 and the fourth ball valve 20 are located, and the foam generator 19 cuts bubbles in the foam oil into micro bubbles with fixed particle sizes. In the flowing process, the mass flow meter 16, the second pressure sensor 24, the second temperature sensor 25, the third pressure sensor 26, the third temperature sensor 27, the fourth pressure sensor 28 and the fourth temperature sensor 29 are used for collecting flowing data of the fluid, and a measuring cylinder 31 is used for measuring height data of the foam oil.
In conclusion, the peristaltic pump is combined with the high-pressure tank to prepare and drive the dissolved crude oil, so that the components which are easy to fail such as pistons are not present, the structure is simple, and the performance is stable. A bypass pipeline of the foam generator is arranged, and can be switched and selected in two modes of natural foam precipitation and artificial foam particle size quantification according to research contents. Safety valves are arranged at the outlet of the peristaltic pump and the top of the high-pressure tank, so that overpressure of equipment can be avoided, and the safety of the system is improved. The measuring cylinder is arranged at the tail of the pipeline, so that the height of the foam oil can be measured in real time, and the foam can be quantized. The pressure reducer can be arranged to set a pressure drop value, and the function of controlling the pressure drop of the fluid is realized. The device has the characteristics of spanning of the foam generator, controllable pressure drop, quantifiable foam, accurate measurement, stable equipment performance and high safety.
Claims (6)
1. A device for evaluating the rheological property of foam oil in gas drive oil extraction is characterized by comprising a high-pressure gas cylinder, a pressure reducing valve, a needle valve, a dryer, a check valve, a first safety valve, an electric stirrer, a first pressure sensor, a first temperature sensor, a high-pressure tank, a first water bath, a first ball valve, a second ball valve, a peristaltic pump, a second safety valve, a mass flowmeter, a pressure reducer, a third ball valve, a foam generator, a fourth ball valve, a fifth ball valve, a second water bath, a test pipeline, a second pressure sensor, a second temperature sensor, a third pressure sensor, a third temperature sensor, a fourth pressure sensor, a fourth temperature sensor, a back-pressure valve and a measuring cylinder; the pressure reducing valve is connected with the high-pressure gas cylinder; the needle valve is connected with the pressure reducing valve; the dryer is connected with the needle valve; one end of the check valve is connected with the dryer, and the other end of the check valve is connected with the high-pressure tank; the first safety valve is connected with the top of the high-pressure tank; an electric stirrer is arranged at the top of the high-pressure tank; the top of the electric stirrer is respectively provided with a first pressure sensor and a first temperature sensor; the first ball valve is connected with the bottom of the high-pressure tank; a pipeline between the ball valve I and the high-pressure tank is connected with a ball valve II; one end of the peristaltic pump is connected with the second ball valve, and the other end of the peristaltic pump is connected with the mass flow meter; the pressure reducer is connected with the mass flow meter; the foam generator is connected with the ball valve III; the ball valve IV is connected with the foam generator; one end of the back pressure valve is connected with the test pipeline, and the other end of the back pressure valve is connected with the measuring cylinder.
2. The foam oil rheology evaluation device in gas flooding oil recovery according to claim 1, characterized in that: a second pressure sensor, a second temperature sensor, a third pressure sensor, a third temperature sensor, a fourth pressure sensor and a fourth temperature sensor are distributed along the test pipeline.
3. The foam oil rheology evaluation device in gas flooding oil recovery according to claim 1, characterized in that: and the test pipeline is arranged in a water bath II.
4. The foam oil rheology evaluation device in gas flooding oil recovery according to claim 1, characterized in that: and a pipeline between the peristaltic pump and the mass flow meter is connected with a second safety valve.
5. The foam oil rheology evaluation device in gas flooding oil recovery according to claim 1, characterized in that: the outlet of the pressure reducer is divided into two pipelines, one pipeline is connected with the ball valve III, and the other pipeline is connected with the ball valve V.
6. The foam oil rheology evaluation device in gas flooding oil recovery according to claim 1, characterized in that: and the pipeline where the ball valve IV and the ball valve V are positioned is combined and then is connected with the testing pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921590727.4U CN210483680U (en) | 2019-09-22 | 2019-09-22 | Foam oil rheology evaluation device in gas flooding oil recovery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921590727.4U CN210483680U (en) | 2019-09-22 | 2019-09-22 | Foam oil rheology evaluation device in gas flooding oil recovery |
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| Publication Number | Publication Date |
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| CN210483680U true CN210483680U (en) | 2020-05-08 |
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|---|---|---|---|
| CN201921590727.4U Expired - Fee Related CN210483680U (en) | 2019-09-22 | 2019-09-22 | Foam oil rheology evaluation device in gas flooding oil recovery |
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Granted publication date: 20200508 Termination date: 20200922 |