CN110646567A - PVT testing device and method suitable for ultrahigh pressure and high temperature viscosity joint test - Google Patents
PVT testing device and method suitable for ultrahigh pressure and high temperature viscosity joint test Download PDFInfo
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N11/00—Investigating flow properties of materials, e.g. viscosity, plasticity; Analysing materials by determining flow properties
- G01N11/02—Investigating flow properties of materials, e.g. viscosity, plasticity; Analysing materials by determining flow properties by measuring flow of the material
- G01N11/04—Investigating flow properties of materials, e.g. viscosity, plasticity; Analysing materials by determining flow properties by measuring flow of the material through a restricted passage, e.g. tube, aperture
- G01N11/08—Investigating flow properties of materials, e.g. viscosity, plasticity; Analysing materials by determining flow properties by measuring flow of the material through a restricted passage, e.g. tube, aperture by measuring pressure required to produce a known flow
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N25/00—Investigating or analyzing materials by the use of thermal means
- G01N25/02—Investigating or analyzing materials by the use of thermal means by investigating changes of state or changes of phase; by investigating sintering
- G01N25/12—Investigating or analyzing materials by the use of thermal means by investigating changes of state or changes of phase; by investigating sintering of critical point; of other phase change
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N25/00—Investigating or analyzing materials by the use of thermal means
- G01N25/56—Investigating or analyzing materials by the use of thermal means by investigating moisture content
- G01N25/66—Investigating or analyzing materials by the use of thermal means by investigating moisture content by investigating dew-point
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Abstract
The invention relates to a PVT testing device and method suitable for ultrahigh pressure and high temperature viscosity joint test. The device consists of an upper PVT cylinder 3, a lower PVT cylinder 3, a high-definition camera 8, a capillary viscosity tester 14, a sealing piston cylinder 20 and a high-temperature oven 22; the upper PVT cylinder is provided with a displacement rod 2 with a piston and a grating ruler 1, the lower PVT cylinder is provided with a rigid direct drive 9 with a piston, the displacement rod is connected with the rigid direct drive through a balanced pressure pipeline 10 and a control valve 11, and displacement motion is carried out by means of pressure transmitted by the balanced pressure pipeline; the upper PVT cylinder and the lower PVT cylinder are provided with glass windows 5 and channel holes 7, the channel holes face to the high-definition camera 8, and a pneumatic isolation valve 6 is arranged between the upper PVT cylinder and the lower PVT cylinder; the capillary viscosity tester 14 is respectively communicated with the inner spaces of the upper PVT cylinder and the lower PVT cylinder; the sealing piston cylinder 20 communicates with the inner space of the upper PVT cylinder. The method includes a PVT testing section, a capillary viscometry section, and a gas-liquid separation section. The invention has reliable principle, can carry out safe and efficient physical property analysis on the oil and gas reservoir fluid, and can also carry out joint measurement on viscosity.
Description
Technical Field
The invention relates to a PVT testing device and method for fluid analysis and controllable ultrahigh pressure and high temperature viscosity joint test in the field of oil and gas reservoir fluid physical property analysis.
Background
In the development of the petroleum industry, the physical property test of hydrocarbon reservoir fluid is an important work which must be carried out, and is reflected in the following aspects:
(1) the physical property data can guide the development of oil and gas reservoir engineering, recognize the type of the oil and gas reservoir and provide high-pressure physical property parameters of the fluid for reserve calculation. Particularly, in the development and production process of the condensate gas reservoir, the high-temperature and high-pressure physical property test can help people calculate the loss of the retrograde condensate liquid amount in the development stage and help people to carry out well testing interpretation and analysis on the condensate gas well; the dynamic prediction of the productivity of the condensate gas well and the flow state of the shaft can be enhanced, and a basis is provided for determining a reasonable development mode and improving the recovery ratio of condensate oil.
(2) The method can be used for testing the physical properties of the oil and gas reservoir, and also can provide a stratum fluid phase state fitting basis for condensate gas reservoir simulation and volatile oil reservoir simulation and a stratum fluid phase state fitting basis for gas injection miscible-phase flooding numerical simulation prediction in the aspect of reservoir simulation.
(3) When the oil gas resource is collected to the ground, the physical property analysis is firstly carried out, the optimal separation condition of the oil gas in the ground separator can be selected, and the fractionation condition of the fractionating tower product is predicted in the ground light hydrocarbon recovery process.
With the rapid development of domestic oil and gas field development, the physical property test of oil and gas reservoir fluid faces more difficulties. With the increase of development difficulty, physical property tests need to be carried out under higher and higher conditions of high temperature and high pressure. And the difficulty of sampling and a large amount of experimental tests simultaneously ensure that the sample needs reasonable multifunctional utilization. Therefore, the invention provides the PVT testing device and method for the ultrahigh-pressure high-temperature viscosity joint test, which can carry out deeper physical property analysis on the oil and gas reservoir fluid, improve the working efficiency and quality of researchers and promote the development of the oil and gas reservoir fluid physical property analysis technology.
Disclosure of Invention
The invention aims to provide a PVT testing device suitable for the joint measurement of ultrahigh pressure and high temperature viscosity, which has reliable principle and simple and convenient operation, is suitable for the physical property analysis of the fluid of an oil and gas reservoir safely and efficiently under the conditions of ultrahigh pressure and high temperature, and can also be used for the joint measurement of viscosity.
The invention also aims to provide a PVT test method suitable for the ultrahigh pressure and high temperature viscosity joint test by using the device, which has the viscosity test function at ultrahigh pressure and high temperature, can obtain the PVT and viscosity data of the oil and gas reservoir fluid at different temperatures and pressures, and provides reasonable basic data for evaluating the oil and gas reservoir fluid.
In order to achieve the technical purpose, the invention adopts the following technical scheme.
The utility model provides a PVT testing arrangement suitable for superhigh pressure high temperature viscosity allies oneself with survey, comprises two upper and lower PVT section of thick bamboo, high definition digtal camera, capillary viscosity tester, sealed piston cylinder, high temperature oven, and the device is located the high temperature oven.
The upper PVT cylinder is provided with a displacement rod with a piston and a grating ruler, the grating ruler is used for measuring the footage of the displacement rod, the lower PVT cylinder is provided with a rigid direct drive with a piston, the pistons are all provided with tip protruding parts, the displacement rod is connected with the rigid direct drive through a balanced pressure pipeline and a control valve, displacement motion is carried out by means of pressure transmitted by the balanced pressure pipeline, and the displacement rod and the rigid direct drive are both connected with a magnetic transmission stirrer; the upper PVT cylinder and the lower PVT cylinder are provided with glass windows and channel holes, the channel holes face the high-definition camera, and a pneumatic isolating valve is arranged between the upper PVT cylinder and the lower PVT cylinder.
The capillary viscosity tester is respectively communicated with the inner spaces of the upper PVT cylinder and the lower PVT cylinder through a three-way valve and a pressure gauge; the sealing piston cylinder is communicated with the inner space of the upper PVT cylinder through a pressure gauge and a three-way valve, and the sealing piston cylinder is directly driven by rigidity with a piston.
The PVT testing method suitable for the ultrahigh-pressure high-temperature viscosity joint test by utilizing the device comprises a PVT testing part, a capillary viscosity testing part and a gas-liquid separation part.
PVT test section: injecting an oil gas sample into the upper PVT cylinder and the lower PVT cylinder through the upper three-way valve and the lower three-way valve, and performing single degassing, multiple degassing and constant volume failure experiments after the fluid reaches a test temperature; when the rigid direct drive of the lower PVT cylinder is driven upwards, a pressure transfer medium is transferred through a balanced pressure pipeline and enters the upper space of the displacement rod of the upper PVT cylinder, the footage condition is recorded through a grating ruler, and the calculated volume is measured; the high-definition camera observes the formation of bubble point dew points in the fluid through the upper channel hole, the lower channel hole and the glass window, and an oil-gas P-V-T relation curve is made through analyzing collected data.
Capillary viscometry section: and starting the pneumatic isolation valve, isolating the upper cylinder body and the lower cylinder body, and respectively driving the fluid in the upper cylinder body and the fluid in the lower cylinder body into the capillary viscosity tester by the displacement rod and the rigid direct drive to measure the fluid viscosity.
A gas-liquid separation section: after the gas-liquid two-phase fluid enters the sealed piston cylinder, the rigid direct drive in the sealed piston cylinder displaces the upper layer gas, thereby achieving the purpose of gas-liquid separation or degassing.
Compared with the prior art, the invention has the following beneficial effects:
(1) the PVT testing device for the ultrahigh pressure and high temperature viscosity joint test has a reliable principle, and can provide a viscosity testing function which is not provided by other devices at the ultrahigh pressure and the ultrahigh temperature;
(2) the testing method of the device is convenient to operate, and can obtain PVT and viscosity data of the oil and gas reservoir fluid under different temperatures and pressures, so that reasonable basic data can be provided for evaluating the oil and gas reservoir fluid;
(3) the device is provided with a unique double-barrel double-visual window, so that the observation space can be larger, a pneumatic isolation valve is adopted in the middle of each double barrel, the double barrels are connected through pipelines, and the pressure of the double barrels can be balanced when pressure is applied;
(4) the piston is provided with a tip protruding part for filling the dead volume of the invisible area, so that the bubble point and the dew point can be observed more accurately and obviously;
(5) the device can test the P-V-T relation curve and observe the pressure of a bubble point and a dew point in an ultrahigh-temperature and high-pressure closed environment, can perform single degassing, multiple degassing and constant volume failure experiments, can also perform fluid viscosity test, and achieves the purpose of recycling the oil gas sample.
Drawings
Fig. 1 is a schematic structural diagram of a PVT testing apparatus suitable for ultrahigh pressure and high temperature viscosity joint measurement.
In the figure:
1. a grating scale; 2. a displacement rod; 3. a PVT cartridge; 4. a magnetic drive agitator; 5. a glass window; 6. a pneumatic isolation valve; 7. a passage hole; 8. a high-definition camera; 9. rigid direct drive; 10. a balanced pressure line; 11. a control valve; 12. a pressure gauge; 13. a three-way valve; 14. a capillary viscosity tester; 15. a three-way valve; 16. a pressure gauge; 17. a control valve; 18. a three-way valve; 19. a pressure gauge; 20. sealing the piston cylinder; 21. rigid direct drive; 22. and (5) a high-temperature oven.
Detailed Description
The invention is further illustrated below with reference to the figures and examples in order to facilitate the understanding of the invention by a person skilled in the art. It is to be understood that the invention is not limited in scope to the specific embodiments, but is intended to cover various modifications within the spirit and scope of the invention as defined and defined by the appended claims, as would be apparent to one of ordinary skill in the art.
See fig. 1.
The utility model provides a PVT testing arrangement suitable for superhigh pressure high temperature viscosity allies oneself with survey, comprises two upper and lower PVT section of thick bamboo 3, high definition digtal camera 8, capillary viscosity tester 14, sealed piston cylinder 20, high temperature oven 22. The upper PVT cylinder is provided with a displacement rod 2 with a piston and a grating ruler 1, the scale of the displacement rod is measured through the grating ruler, the lower PVT cylinder is provided with a rigid direct drive 9 with the piston, the displacement rod is connected with the rigid direct drive through a balanced pressure pipeline 10 and a control valve 11, displacement motion is carried out by means of pressure transmitted by the balanced pressure pipeline, and the displacement rod and the rigid direct drive are both connected with a magnetic transmission stirrer 4; the upper PVT cylinder and the lower PVT cylinder are provided with glass windows 5 and channel holes 7, the channel holes face to the high-definition camera 8, and a pneumatic isolation valve 6 is arranged between the upper PVT cylinder and the lower PVT cylinder; the capillary viscosity tester 14 is respectively communicated with the inner spaces of the upper PVT cylinder and the lower PVT cylinder through three-way valves (13, 15) and pressure gauges (12, 16); the sealing piston cylinder 20 is communicated with the inner space of the upper PVT cylinder through a pressure gauge 19, a three-way valve 18 and a control valve 17, and the sealing piston cylinder is provided with a rigid direct drive 21 with a piston. The device is located in a high temperature oven.
The upper PVT cylinder has a displacement rod 2 with a piston, the lower PVT cylinder has a rigid direct drive 9 with a piston, the pistons are all provided with tip projections for filling the dead volume of the invisible area.
The method for performing viscosity test and PVT test by using the device comprises the following steps:
(1) connection and seal detection
The device is connected according to the schematic diagram of fig. 1, debugging is carried out, and whether the pipeline of the experimental device leaks air is checked by using nitrogen.
(2) Preparation of the experiment
The three-way valve 13 or the three-way valve 15 is opened to inject the sample fluid into the PVT cartridge 3. The temperature is raised by a high-temperature oven 22, the magnetic transmission stirrer 4 is started, and the temperature is kept unchanged for 4 hours.
(3) PVT phase testing
After the fluid reaches the testing temperature, single degassing, multiple degassing and constant volume exhaustion experiments can be carried out by controlling the rigid direct drive 9 with the piston. And slowly adjusting the control valve 17, discharging the fluid to reduce the pressure, simultaneously recording the footage condition by the grating ruler 1, and measuring the position and calculating the volume. Through the high-definition camera 8, the formation of bubble point dew points in the fluid is observed through the sapphire glass windows 5 of the double cylinders, and the collected data is recorded, analyzed and made into a phase diagram.
(4) Viscosity test
The upper cylinder and the lower cylinder are isolated by the pneumatic valve 6, the three-way valve 13 and the three-way valve 15 on the viscosity testing pipeline are opened slowly, fluid enters the capillary viscosity testing instrument, the pressure gauge 12 and the pressure gauge 16 are recorded, and the fluid viscosity is measured by calculating the pressure difference.
(5) Fluid discharge
And (3) opening a safety control valve 17 and a three-way valve 18 on a sample conveying pipeline, so that fluid flowing out in the experiment can enter a sealing piston cylinder 20, and is collected for other experimental tests.
(6) Gas-liquid separation treatment
After standing still for 10 hours, the gas-liquid fluid is not mutually dissolved in the sealed piston cylinder 20, the three-way valve 18 is opened, and the rigid direct drive 21 with the piston is used for displacing the upper layer gas to achieve the purpose of gas-liquid separation.
Claims (6)
1. A PVT testing device suitable for ultrahigh pressure and high temperature viscosity joint measurement is composed of an upper PVT cylinder (3), a lower PVT cylinder (3), a high definition camera (8), a capillary viscosity tester (14), a sealing piston cylinder (20) and a high temperature oven (22), and is positioned in the high temperature oven, and is characterized in that the upper PVT cylinder is provided with a displacement rod (2) with a piston and a grating ruler (1), the scale of the displacement rod is measured through the grating ruler, the lower PVT cylinder is provided with a rigid direct drive (9) with the piston, the displacement rod is connected with the rigid direct drive through a balance pressure pipeline (10) and a control valve (11), and is in displacement motion by means of pressure transmitted by the balance pressure pipeline, and the displacement rod and the rigid direct drive are both connected with a magnetic transmission stirrer (4); the upper PVT cylinder and the lower PVT cylinder are provided with glass windows (5) and channel holes (7), the channel holes face to the high-definition camera (8), and a pneumatic isolating valve (6) is arranged between the upper PVT cylinder and the lower PVT cylinder; the capillary viscosity tester (14) is respectively communicated with the inner spaces of the upper PVT cylinder and the lower PVT cylinder through a three-way valve and a pressure gauge; the sealing piston cylinder (20) is communicated with the inner space of the upper PVT cylinder through a pressure gauge and a three-way valve, and the sealing piston cylinder is directly driven by rigidity with a piston.
2. The PVT testing device suitable for the ultra-high pressure and high temperature viscosity simultaneous measurement as claimed in claim 1, wherein the upper PVT cylinder has a displacement rod with a piston, the lower PVT cylinder has a rigid direct drive with a piston, and the pistons are provided with tip protrusions for filling dead volumes in invisible areas.
3. The method for testing PVT suitable for the ultrahigh-pressure high-temperature viscosity joint test by using the device of claim 1 or 2 comprises a PVT testing part, a capillary viscosity testing part and a gas-liquid separation part.
4. The method of claim 3, wherein the PVT testing portion is performed by: injecting the oil gas sample into the upper PVT cylinder and the lower PVT cylinder, and performing single degassing, multiple degassing and constant volume failure experiments after the fluid reaches the test temperature; when the rigid direct drive of the lower PVT cylinder is driven upwards, a pressure transfer medium is transferred through a balanced pressure pipeline and enters the upper space of the displacement rod of the upper PVT cylinder, the footage condition is recorded through a grating ruler, and the calculated volume is measured; the high-definition camera observes the formation of bubble point dew points in the fluid through the channel hole and the glass window, and an oil-gas P-V-T relation curve is made through analyzing the collected data.
5. The method of claim 3, wherein the capillary viscometry section is performed by: and starting the pneumatic isolation valve, isolating the upper cylinder body and the lower cylinder body, and respectively driving the fluid in the upper cylinder body and the fluid in the lower cylinder body into the capillary viscosity tester by the displacement rod and the rigid direct drive to measure the fluid viscosity.
6. The method of claim 3, wherein the gas-liquid separation part is carried out by: after the gas-liquid two-phase fluid enters the sealed piston cylinder, the rigid direct drive in the sealed piston cylinder displaces the upper layer gas, thereby achieving the purpose of gas-liquid separation or degassing.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910954897.4A CN110646567A (en) | 2019-10-09 | 2019-10-09 | PVT testing device and method suitable for ultrahigh pressure and high temperature viscosity joint test |
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| CN201910954897.4A CN110646567A (en) | 2019-10-09 | 2019-10-09 | PVT testing device and method suitable for ultrahigh pressure and high temperature viscosity joint test |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113310845A (en) * | 2021-05-26 | 2021-08-27 | 内蒙古民族大学 | High-temperature and high-pressure stratum crude oil physical property analysis system |
| CN113567302A (en) * | 2021-07-27 | 2021-10-29 | 西南石油大学 | Ultrahigh-temperature high-pressure oil-gas fluid viscosity tester and application method thereof |
| WO2022023567A1 (en) * | 2020-07-30 | 2022-02-03 | CLEAR SOLUTIONS (HOLDINGS) lIMITED | Fluid property sensor |
| CN115184234A (en) * | 2022-07-01 | 2022-10-14 | 西南石油大学 | Ultrahigh pressure gas reservoir drilling fluid pollution evaluation experiment system and method |
| CN117871591A (en) * | 2024-03-13 | 2024-04-12 | 中海石油气电集团有限责任公司 | Fluid phase balance measuring device and method suitable for different volatility characteristics |
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