CN108896599B - System and method for testing gas-water relative permeability curve - Google Patents
System and method for testing gas-water relative permeability curve Download PDFInfo
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- CN108896599B CN108896599B CN201810465582.9A CN201810465582A CN108896599B CN 108896599 B CN108896599 B CN 108896599B CN 201810465582 A CN201810465582 A CN 201810465582A CN 108896599 B CN108896599 B CN 108896599B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N24/00—Investigating or analyzing materials by the use of nuclear magnetic resonance, electron paramagnetic resonance or other spin effects
- G01N24/08—Investigating or analyzing materials by the use of nuclear magnetic resonance, electron paramagnetic resonance or other spin effects by using nuclear magnetic resonance
- G01N24/081—Making measurements of geologic samples, e.g. measurements of moisture, pH, porosity, permeability, tortuosity or viscosity
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume, or surface-area of porous materials
- G01N15/08—Investigating permeability, pore-volume, or surface area of porous materials
Abstract
The invention discloses a system and a method for testing a gas-water relative permeability curve, wherein the system comprises a core holder, a first back pressure valve, a working medium bottle, a circulating pump and a heater are connected in series between a confining pressure outlet end and a confining pressure inlet end of the core holder, the inlet end of the core holder is provided with a first parallel pipeline, a second parallel pipeline and a third parallel pipeline, the first parallel pipeline is connected with a middle container and a constant-speed constant-pressure pump, and the second parallel pipeline is connected with a humidifier, a voltage stabilizer, a pressure reducing valve and a gas bottle; the third parallel pipeline is provided with a vent valve; and the outlet end of the core holder is provided with a first parallel pipeline and a second parallel pipeline, the first parallel pipeline is connected with a vacuum pump, and the second parallel pipeline is connected with a second back pressure valve and a metering device. The method comprises the following steps: s1, preparation; s2, saturating formation water with a rock core; s3, measuring the effective gas-phase permeability of the rock core in a water-bound state; s4, measuring the relative permeability of gas and water; s5, determining the water phase effective permeability of the rock core in a residual gas state; and S6, drawing a gas-water relative permeability curve.
Description
Technical Field
The invention relates to the field of petroleum and natural gas, in particular to a system and a method for testing a gas-water relative permeability curve.
Background
The gas-water relative permeability curve is indispensable data in water drive gas reservoir development engineering, and is an important basis for calculating water drive gas efficiency, predicting gas reservoir development indexes, analyzing gas reservoir development dynamics, researching gas-water two-phase seepage physical characteristics and developing gas reservoir numerical simulation research.
At present, indoor experimental tests of gas-water relative permeability curves in China are mainly based on the current oil and gas industry standard of the people's republic of China (SY/T5345-2007' method for measuring relative permeability of two-phase fluid in rock ') and the national standard of the people's republic of China (GB/T28912-2012 'method for measuring relative permeability of two-phase fluid in rock'). In the above standards, the gas-water relative permeability curve testing method mainly includes two types, namely a steady-state method and an unsteady-state gas flooding water method. Wherein:
the basic principle of the steady-state method is one-dimensional Darcy seepage, the experimental process requires that under the condition of ensuring that no turbulent flow is generated, a larger displacement pressure difference is adopted to eliminate the influence of the end effect in the experimental process, and the standard stipulates that the tested rock core gas logging permeability is more than 0.5mD, so the application range of the method is limited. In addition, the steady-state method has the defects of long experimental test period and complex fluid saturation determination process.
The theoretical basis of the unsteady gas flooding water method is the water flooding front propulsion theory of Buckley-Leverett. In the experimental test process, the distribution of fluid in the porous medium is a function of time and space, so that the recorded data at the outlet end is constantly changed, the reliability of the test result of the relative permeability curve is greatly influenced by the precision of a calculation method and a calculation process, and the defect that the data processing process is complex exists. At the same time, the theoretical assumption requires that the compressibility of the fluid be disregarded, which is feasible for slightly compressible fluids such as oil and water, but not for compressible fluids such as gas. In addition, water flooding gas is adopted in the actual gas reservoir development process instead of gas flooding water, the gas-water relative permeability curve is greatly influenced by the fluid saturation sequence, and the guiding significance of the relative permeability curve tested by adopting an unsteady gas flooding method on the actual water flooding gas reservoir development is not large.
Disclosure of Invention
The invention provides a system and a method for testing a gas-water relative permeability curve, which not only accords with the actual development process of a water-drive gas reservoir, but also effectively overcomes the defects of the existing method.
The purpose of the invention is realized as follows:
a system for testing a gas-water relative permeability curve by an unsteady state water gas flooding method comprises a rock core holder and a nuclear magnetic resonance device, wherein the nuclear magnetic resonance device is used for detecting a rock core in the rock core holder, the rock core holder is provided with an inlet end, an outlet end, a confining pressure inlet end and a confining pressure outlet end, valves are arranged at the inlet end and the outlet end of the rock core holder, the valves at the inlet end and the outlet end of the rock core holder are in a closed state in a normal state,
a first back pressure valve, a working medium bottle, a circulating pump and a heater are sequentially connected in series between the confining pressure outlet end and the confining pressure inlet end of the rock core holder to form a loop, the first back pressure valve is connected with a first back pressure pump for controlling the pressure of the first back pressure valve, and a liquid working medium for applying confining pressure in a nuclear magnetic resonance displacement experiment is filled in the working medium bottle;
the inlet end of the rock core holder is provided with a first parallel pipeline, a second parallel pipeline and a third parallel pipeline, the first parallel pipeline is sequentially connected with an intermediate container and a constant-speed constant-pressure pump, and experimental formation water is filled in the intermediate container; the second parallel pipeline is sequentially connected with a humidifier, a voltage stabilizer, a pressure reducing valve and a gas cylinder; the third parallel pipeline is provided with an emptying valve;
the outlet end of the rock core holder is provided with a first parallel pipeline and a second parallel pipeline, the first parallel pipeline is connected with a vacuum pump, the second parallel pipeline is sequentially connected with a second back-pressure valve and a metering device for metering liquid, the metering device is connected with a gas flowmeter, and the second back-pressure valve is connected with a second back-pressure pump for controlling the pressure of the second back-pressure valve.
Preferably, the system further comprises a computer control terminal, and the computer control terminal is connected with the nuclear magnetic resonance device, the constant-speed and constant-pressure pump, the circulating pump, the heater, the first back-pressure pump, the second back-pressure pump and the metering device.
Preferably, the experimental formation water in the intermediate container is configured according to the actual gas reservoir experimental formation water mineral composition.
A method for testing a gas-water relative permeability curve by an unsteady water-flooding method comprises a system for testing the gas-water relative permeability curve by the unsteady water-flooding method, and comprises the following steps:
s1, preparation of experiment
S2 rock core saturation experiment formation water
S21, loading the rock core into the rock core holder, starting a circulating pump, a heater and a first back pressure pump, setting the displacement pressure of the circulating pump, the pressure of the first back pressure valve and the temperature of the heater, wherein the displacement pressure of the circulating pump is higher than the pressure of the back pressure valve, and establishing the temperature and pressure condition required by the test;
s22, opening an emptying valve, starting a constant-speed constant-pressure pump to perform constant-pressure displacement, enabling the displacement pressure to be lower than the confining pressure, emptying air in a pipeline at the outlet end of the constant-speed constant-pressure pump by using experimental formation water, then closing the emptying valve, and closing the constant-speed constant-pressure pump after the fluid pressure in the pipeline at the outlet end of the constant-speed constant-pressure pump reaches the displacement pressure of the constant-speed constant-pressure pump;
s23, opening a valve at the outlet end of the core holder, starting a vacuum pump, vacuumizing the core, closing the valve at the outlet end, and closing the vacuum pump;
s24, starting the constant-speed constant-pressure pump, performing constant-pressure displacement under the same pressure, opening a valve at the inlet end of the core holder to saturate the rock core with experimental formation water, then closing the valve at the inlet end of the core holder, and closing the constant-speed constant-pressure pump;
s25, detecting the T2 map of the rock core in a saturated water state by adopting nuclear magnetic resonance;
s3 determination of gas-phase effective permeability of rock core in water-bound state
S31, opening an emptying valve and an air bottle, exhausting experimental formation water in an outlet end pipeline of the air bottle by using air, then closing the emptying valve, opening an inlet end valve of the core holder and an outlet end valve of the core holder after the fluid pressure in the outlet end pipeline of the air bottle is stable, and performing constant-pressure displacement until a display result of the metering device is not changed any more;
s32, detecting the T2 map of the rock core in the bound water state by adopting nuclear magnetic resonance, and calculating the saturation of the bound water of the rock core;
s33, recording the gas flow under the current displacement differential pressure by adopting a gas flowmeter, and calculating the effective gas phase permeability of the rock core in the water-bound state;
s34, closing an inlet end valve of the core holder, an outlet end valve of the core holder, an air bottle and an air flow meter;
s4 determination of gas-water relative permeability
S41, starting the constant-speed constant-pressure pump and the second back-pressure pump, setting displacement pressure of the constant-speed constant-pressure pump and pressure of the second back-pressure valve, adopting water flooding gas until no bubble is generated at the outlet end of the core holder by constant displacement pressure difference, recording pressures of the inlet end of the core holder and the outlet end of the core holder at different time nodes, experimental stratum water flow and T2 maps of the core, and calculating water saturation of the core at different time nodes and corresponding water phase effective permeability;
s42, calculating gas flow change rates in rock cores of different time nodes according to the change conditions of water saturation of the rock cores of different time nodes, and accordingly calculating gas flow and gas phase effective permeability at different moments;
s5 determination of effective permeability of water phase in residual gas state of rock core
S51, detecting a T2 map of the rock core under the residual gas state, and calculating the residual gas saturation of the rock core;
s52, displacing the experimental formation water with constant pressure, measuring the flow of the experimental formation water under the current displacement pressure difference, and calculating the water phase effective permeability of the core in the residual gas state;
s6, drawing a gas-water relative permeability curve
And establishing a rectangular coordinate system by taking the water saturation value of the rock core as a horizontal coordinate and the relative permeability value as a vertical coordinate, and respectively drawing a gas phase relative permeability curve and a water phase relative permeability curve corresponding to different water saturations of the rock core by adopting smooth curves.
Preferably, in S33, the gas phase effective permeability of the cubic core in a bound water state is continuously calculated with a relative error of less than 3%.
Preferably, in S52, the effective permeability of the water phase of the tertiary core in the residual gas state is continuously calculated with a relative error of less than 3%.
Due to the adoption of the technical scheme, the method has the advantages of high testing precision, simplicity, short experimental testing period and wide application range.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
Detailed Description
Referring to fig. 1, a system for testing a gas-water relative permeability curve by an unsteady state water gas flooding method comprises a core holder and a nuclear magnetic resonance device, wherein the nuclear magnetic resonance device is used for detecting a core in the core holder, and the structures and the working methods of the core holder and the nuclear magnetic resonance device are as follows with the patent application number: 201510392019.X, the core holder is provided with an inlet end, an outlet end, a confining pressure inlet end and a confining pressure outlet end, valves are arranged at the inlet end and the outlet end of the core holder, and the valves at the inlet end and the outlet end of the core holder are in a closed state in a normal state.
The confining pressure outlet end of the rock core holder is sequentially connected with a first back-pressure valve (indicated as a back-pressure valve in the figure), a working medium bottle, a circulating pump and a heater in series between the confining pressure inlet end and the confining pressure outlet end, a loop is formed and used for providing confining pressure and nuclear magnetic resonance, the first back-pressure valve is connected with a first back-pressure pump (indicated as a back-pressure pump in the figure) used for controlling the pressure of the first back-pressure valve, and a liquid working medium used for applying confining pressure in a nuclear magnetic resonance displacement experiment is arranged in the working medium.
The inlet end of the rock core holder is provided with a first parallel pipeline, a second parallel pipeline and a third parallel pipeline, the first parallel pipeline is sequentially connected with an intermediate container and a constant-speed constant-pressure pump, experimental formation water is filled in the intermediate container, and the experimental formation water in the intermediate container is configured according to mineral components of the experimental formation water of an actual gas reservoir. The constant-speed constant-pressure pump adopts a high-precision constant-speed constant-pressure pump. The second parallel pipeline is sequentially connected with a humidifier, a voltage stabilizer, a pressure reducing valve and a gas cylinder, and a nitrogen cylinder is adopted in the embodiment; the third parallel pipeline is provided with an emptying valve;
the outlet end of the rock core holder is provided with a first parallel pipeline and a second parallel pipeline, the first parallel pipeline is connected with a vacuum pump, the second parallel pipeline is sequentially connected with a second back-pressure valve and a metering device, the second back-pressure valve is used for controlling the pressure of the second back-pressure valve, the metering device is connected with a gas flowmeter, and the back-pressure end of the second back-pressure valve is connected with a second back-pressure pump (shown as the back-pressure pump in the figure).
The nuclear magnetic resonance constant-pressure pump system is characterized by further comprising a computer control terminal, wherein the computer control terminal is connected with the nuclear magnetic resonance device, the constant-speed constant-pressure pump, the circulating pump, the heater, the first back-pressure pump, the second back-pressure pump and the metering device. And the computer control terminal acquires the information of each device and controls each device according to the test requirement.
A method for testing a gas-water relative permeability curve by an unsteady water-flooding method comprises a system for testing the gas-water relative permeability curve by the unsteady water-flooding method, and comprises the following steps:
s1, preparation of experiment
S11, preparing a core, cleaning, drying, measuring the diameter and length of the core, and measuring the porosity and absolute permeability of the gas logging core; particularly, according to the standard, the gas logging permeability of the experimental rock core can be used for testing a gas-water relative permeability curve only when the gas logging permeability is more than 0.01 mD;
s12, preparing experimental formation water, and transferring the experimental formation water into an intermediate container; in particular, high-purity nitrogen was used instead of natural gas in the experiment;
s13, connecting related experimental equipment according to the experimental flow chart, and checking the joints of the experimental equipment to ensure that no leakage exists in the whole experimental process;
s14, setting nuclear magnetic resonance testing parameters according to the oil and gas industry standard (SY/T6490-2007 ' rock sample nuclear magnetic resonance parameter laboratory measurement standard ') of the people ' S republic of China;
s2 rock core saturation experiment formation water
S21, loading the rock core into the rock core holder, starting a circulating pump, a heater and a first back pressure pump, setting the displacement pressure of the circulating pump, the pressure of the first back pressure valve and the temperature of the heater, wherein the displacement pressure of the circulating pump is higher than the pressure of the back pressure valve, and establishing the temperature and pressure condition required by the test;
s22, opening an emptying valve, starting a constant-speed constant-pressure pump to perform constant-pressure displacement, enabling the displacement pressure to be lower than the confining pressure, emptying air in a pipeline at the outlet end of the constant-speed constant-pressure pump by using experimental formation water, then closing the emptying valve, and closing the constant-speed constant-pressure pump after the fluid pressure in the pipeline at the outlet end of the constant-speed constant-pressure pump reaches the displacement pressure of the constant-speed constant-pressure pump;
s23, opening a valve at the outlet end of the core holder, starting a vacuum pump, vacuumizing the core, closing the valve at the outlet end, and closing the vacuum pump;
s24, starting the constant-speed constant-pressure pump, performing constant-pressure displacement under the same pressure, opening a valve at the inlet end of the core holder to saturate the rock core with experimental formation water, then closing the valve at the inlet end of the core holder, and closing the constant-speed constant-pressure pump;
s25, detecting T of rock core in saturated water state by adopting nuclear magnetic resonance2A map;
s3 determination of gas-phase effective permeability of rock core in water-bound state
S31, opening an emptying valve and an air bottle, exhausting experimental formation water in an outlet end pipeline of the air bottle by using nitrogen, then closing the emptying valve, opening an inlet end valve of the core holder and an outlet end valve of the core holder after the fluid pressure in the outlet end pipeline of the air bottle is stable, and performing constant-pressure displacement until a display result of the metering device is not changed any more, which indicates that gas displacement is finished, and means that core bound water is established in the experimental process;
s32 detecting T of rock core in bound water state by adopting nuclear magnetic resonance2The atlas is used for calculating the saturation of the bound water of the rock core;
s33, recording the gas flow under the current displacement differential pressure by adopting a gas flowmeter, and calculating the effective gas phase permeability of the rock core in the water-bound state; and continuously calculating the gas phase effective permeability of the cubic rock core in a water-bound state, and enabling the relative error to be less than 3%.
S34, closing an inlet end valve of the core holder, an outlet end valve of the core holder, an air bottle and an air flow meter;
s4 determination of gas-water relative permeability
S41, starting the constant-speed constant-pressure pump and the second back-pressure pump, and setting the displacement pressure and the second back-pressure of the constant-speed constant-pressure pumpBack pressure of the pump is constant displacement differential pressure, water-driven gas is adopted until no bubble is generated at the outlet end of the core holder, and pressure, experimental formation water flow and T of the core at different time nodes of the inlet end and the outlet end of the core holder are recorded2The atlas is used for calculating the rock core water saturation and the corresponding water phase effective permeability of different time nodes;
and S42, calculating the gas flow change rate in the rock core at different time nodes by adopting a material balance principle according to the change condition of the water saturation of the rock core at different time nodes, namely the pore volume of the rock core is constant, so as to calculate the gas flow and the gas phase effective permeability at different moments.
S5 determination of effective permeability of water phase in residual gas state of rock core
S51, detecting T of the rock core in the state of residual gas2The atlas is used for calculating the residual gas saturation of the rock core;
s52, displacing the experimental formation water with constant pressure, measuring the flow of the experimental formation water under the current displacement pressure difference, and calculating the water phase effective permeability of the core in the residual gas state; the effective permeability of the water phase of the tertiary core in the state of residual gas is continuously calculated, and the relative error is less than 3%.
S6, drawing a gas-water relative permeability curve
And establishing a rectangular coordinate system by taking the water saturation value of the rock core as a horizontal coordinate and the relative permeability value as a vertical coordinate, and respectively drawing a gas phase relative permeability curve and a water phase relative permeability curve corresponding to different water saturations of the rock core by adopting smooth curves.
Referring to fig. 1, valves are arranged at one end of each parallel pipeline connected with the core holder, and the valves are gate valves. The places needing to measure the pressure are provided with pressure gauges, and the places needing to measure the temperature are provided with thermometers.
Finally, it is noted that the above-mentioned preferred embodiments illustrate rather than limit the invention, and that, although the invention has been described in detail with reference to the above-mentioned preferred embodiments, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the scope of the invention as defined by the appended claims.
Claims (6)
1. A method for testing a gas-water relative permeability curve by an unsteady state water flooding method is characterized by comprising the following steps:
s1, preparation of experiment
S2 rock core saturation experiment formation water
S21, loading the rock core into the rock core holder, starting the circulating pump, the heater and the first back pressure pump, setting the displacement pressure of the circulating pump, the pressure of the first back pressure valve and the temperature of the heater, setting the displacement pressure of the circulating pump to be slightly higher than the pressure of the back pressure valve, and establishing the temperature and pressure condition required by the test;
s22, opening an emptying valve, starting a constant-pressure displacement of the constant-speed constant-pressure pump, enabling the displacement pressure to be lower than the confining pressure, emptying air in a pipeline at the outlet end of the constant-speed constant-pressure pump by using experimental formation water, then closing the emptying valve, and closing the constant-speed constant-pressure pump after the fluid pressure of the pipeline at the outlet end of the constant-speed constant-pressure pump reaches the displacement pressure of the constant-speed constant-pressure pump;
s23, opening a valve at the outlet end of the core holder, starting a vacuum pump, vacuumizing the core, closing the valve at the outlet end, and closing the vacuum pump;
s24, starting the constant-speed constant-pressure pump, performing constant-pressure displacement under the same pressure, opening a valve at the inlet end of the core holder to saturate the rock core with experimental formation water, then closing the valve at the inlet end of the core holder, and closing the constant-speed constant-pressure pump;
s25, detecting T of rock core in saturated water state by adopting nuclear magnetic resonance2A map;
s3 determination of gas-phase effective permeability of rock core in water-bound state
S31, opening an emptying valve and an air bottle, exhausting experimental formation water in an outlet end pipeline of the air bottle by using air, then closing the emptying valve, opening an inlet end valve of the core holder and an outlet end valve of the core holder after the fluid pressure in the outlet end pipeline of the air bottle is stable, and performing constant-pressure displacement until a display result of the metering device is not changed any more;
s32 detecting T of rock core in bound water state by adopting nuclear magnetic resonance2Atlas, calculationCore irreducible water saturation;
s33, recording the gas flow under the current displacement differential pressure by adopting a gas flowmeter, and calculating the effective gas phase permeability of the rock core in the water-bound state;
s34, closing an inlet end valve of the core holder, an outlet end valve of the core holder, an air bottle and an air flow meter;
s4 determination of gas-water relative permeability
S41, starting the constant-speed constant-pressure pump and the second back-pressure pump, setting the displacement pressure of the constant-speed constant-pressure pump and the pressure of the second back-pressure valve, adopting water flooding air until the outlet end of the core holder does not generate bubbles under the constant displacement pressure difference, and recording the pressure of the inlet end of the core holder and the outlet end of the core holder at different time nodes, the experimental formation water flow and the T of the core2The atlas is used for calculating the rock core water saturation and the corresponding water phase effective permeability of different time nodes;
s42, calculating gas flow change rates in rock cores of different time nodes according to the change conditions of water saturation of the rock cores of different time nodes, and accordingly calculating gas flow and gas phase effective permeability at different moments;
s5 determination of effective permeability of water phase in residual gas state of rock core
S51, detecting T of the rock core in the state of residual gas2The atlas is used for calculating the residual gas saturation of the rock core;
s52, displacing the experimental formation water with constant pressure, measuring the flow of the experimental formation water under the current displacement pressure difference, and calculating the water phase effective permeability of the core in the residual gas state;
s6, drawing a gas-water relative permeability curve
And establishing a rectangular coordinate system by taking the water saturation value of the rock core as a horizontal coordinate and the relative permeability value as a vertical coordinate, and respectively drawing a gas phase relative permeability curve and a water phase relative permeability curve corresponding to different water saturations of the rock core by adopting smooth curves.
2. The method for testing the gas-water relative permeability curve by the unsteady-state water-flooding method as claimed in claim 1, wherein in S33, the gas-phase effective permeability of the cubic core in the water-bound state is continuously calculated, and the relative error is less than 3%.
3. The method for testing the gas-water relative permeability curve by the unsteady-state water-flooding method as claimed in claim 1, wherein in S52, the effective permeability of the water phase of the cubic core in the residual gas state is continuously calculated, and the relative error is less than 3%.
4. A system for testing a gas-water relative permeability curve by an unsteady water-drive gas method is used for the method for testing the gas-water relative permeability curve by the unsteady water-drive gas method as claimed in any one of claims 1 to 3, and comprises a core holder and a nuclear magnetic resonance device, wherein the nuclear magnetic resonance device is used for detecting a core in the core holder, the core holder is provided with an inlet end, an outlet end, a confining pressure inlet end and a confining pressure outlet end, the inlet end and the outlet end of the core holder are respectively provided with a valve, and the valves at the inlet end and the outlet end of the core holder are in a closed state in a normal state, and the system is characterized in that:
a first back pressure valve, a working medium bottle, a circulating pump and a heater are sequentially connected in series between the confining pressure outlet end and the confining pressure inlet end of the rock core holder to form a loop, the first back pressure valve is connected with a first back pressure pump for controlling the pressure of the first back pressure valve, and a liquid working medium for applying confining pressure in a nuclear magnetic resonance displacement experiment is filled in the working medium bottle;
the inlet end of the rock core holder is provided with a first parallel pipeline, a second parallel pipeline and a third parallel pipeline, the first parallel pipeline is sequentially connected with an intermediate container and a constant-speed constant-pressure pump, and experimental formation water is filled in the intermediate container; the second parallel pipeline is sequentially connected with a humidifier, a voltage stabilizer, a pressure reducing valve and a gas cylinder; the third parallel pipeline is provided with an emptying valve;
the outlet end of the rock core holder is provided with a first parallel pipeline and a second parallel pipeline, the first parallel pipeline is connected with a vacuum pump, the second parallel pipeline is sequentially connected with a second back-pressure valve and a metering device for metering liquid, the metering device is connected with a gas flowmeter, and the second back-pressure valve is connected with a second back-pressure pump for controlling the pressure of the second back-pressure valve.
5. The system for testing the gas-water relative permeability curve by the unsteady-state water drive gas method according to claim 4, further comprising a computer control terminal, wherein the computer control terminal is connected with a nuclear magnetic resonance device, a constant-speed constant-pressure pump, a circulating pump, a heater, a first back-pressure pump, a second back-pressure pump and a metering device.
6. The system for testing the gas-water relative permeability curve by the unsteady-state water-flooding method as claimed in claim 4, wherein the experimental formation water in the intermediate container is configured according to the experimental formation water mineral composition of the actual gas reservoir.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103616321A (en) * | 2013-11-11 | 2014-03-05 | 大连理工大学 | X-ray CT (Computed Tomography) measurement system for gas-water relative permeability |
| CN104196524A (en) * | 2014-07-14 | 2014-12-10 | 中国地质大学（北京） | Method for measuring gas and water production dynamic relative permeability curve in undersaturation coal reservoir development |
| CN105606517A (en) * | 2016-03-25 | 2016-05-25 | 中国地质大学（北京） | Instrument for measuring relative permeability of low permeability reservoir using nuclear magnetic resonance |
| CN107991335A (en) * | 2016-10-26 | 2018-05-04 | 中国石油天然气股份有限公司 | Tight sand Water-blocking damage evaluation test method |
-
2018
- 2018-05-16 CN CN201810465582.9A patent/CN108896599B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103616321A (en) * | 2013-11-11 | 2014-03-05 | 大连理工大学 | X-ray CT (Computed Tomography) measurement system for gas-water relative permeability |
| CN104196524A (en) * | 2014-07-14 | 2014-12-10 | 中国地质大学（北京） | Method for measuring gas and water production dynamic relative permeability curve in undersaturation coal reservoir development |
| CN105606517A (en) * | 2016-03-25 | 2016-05-25 | 中国地质大学（北京） | Instrument for measuring relative permeability of low permeability reservoir using nuclear magnetic resonance |
| CN107991335A (en) * | 2016-10-26 | 2018-05-04 | 中国石油天然气股份有限公司 | Tight sand Water-blocking damage evaluation test method |
Non-Patent Citations (2)
| Title |
|---|
| A Novel Method for Gas–Water Relative Permeability Measurement of Coal Using NMR Relaxation;Xiaoxiao Sun et al.;《Transp. Porous Med.》;20180502;第124卷;73-90 * |
| 非稳态法水驱气相对渗透率曲线实验;易敏 等;《天然气工业》;20071031;第27卷(第10期);92-94 * |
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