CN105606517B - Instrument for measuring relative permeability of low permeability reservoir using nuclear magnetic resonance - Google Patents
Instrument for measuring relative permeability of low permeability reservoir using nuclear magnetic resonance Download PDFInfo
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- CN105606517B CN105606517B CN201610176339.6A CN201610176339A CN105606517B CN 105606517 B CN105606517 B CN 105606517B CN 201610176339 A CN201610176339 A CN 201610176339A CN 105606517 B CN105606517 B CN 105606517B
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- G—PHYSICS
- G01—MEASURING; TESTING
- 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 an instrument for measuring the relative permeability of a low permeability reservoir using nuclear magnetic resonance. The instrument comprises hardware and software, wherein the hardware comprises a non-magnetic rock sample clamp, a pressure-bearing container, a gas drying device, an electronic balance and a gas flow measurement device; and the software comprises a communication acquisition module, a data arrangement module, a data display module, a data recording module, an experiment process control module and a data exporting module. The instrument can be used for a measurement experiment of the relative permeability of gas and water of a non-conventional reservoir and can accurately provide experimental parameters to achieve the aim of dynamically monitoring the fluid distribution and the flowing rule.
Description
Technical field
The invention belongs to the low permeability reservoir permeability test experiments equipment technical field such as coal, shale, and in particular to a kind of
With reference to the instrument of Nuclear Magnetic Resonance Measurement low permeability reservoir relative permeability.
Background technology
Coal seam reservoirs relative permeability parameter is the key parameter of coal seam reservoirs Simulation evaluation and coal bed gas well output dynamic prediction
One of, accurately obtain coal seam reservoirs relative permeability significant for the exploitation of coal bed gas.At present, conventional reservoir is relative permeates
Rate analysis method（Petroleum industry standard：SY/T 5843-1997）Be obtain low hole, low permeability reservoir relative permeability it is important
Approach, though application of the method in conventional reservoir is highly developed, in view of " the low hole of unconventional reservoir（Movable fluid hole
Porosity is generally less than 3%）, it is hypotonic（Generally less than 0.1mD）With high anisotropism " the characteristics of, this conventional method is very
Rule oil gas（Coal bed gas, shale gas etc.）Practicality in the gas and water relative permeability research of reservoir is poor.
Cold store enclosure is the important method for measuring relative permeability, and the method is with one-dimensional two phase fluid flow theory and gaseous state
Equation is foundation, using unstable state constant-voltage method carry out rock sample gas drive water experiment, record gas drive water during the rock sample port of export each
The data such as the gas production at moment, aquifer yield and rock sample two ends pressure reduction.
Need to determine the aquifer yield at each moment during unsteady state experiment, due to low hole, the hypotonic spy of unconventional reservoir
Levy, institute's moisture content less in rock sample, be likely to the meeting nubbin water yield in displacement process in pipeline and be difficult to obtain, cause aquifer yield
Error of measured data it is larger.Simultaneously for the coal and shale reservoir of the double osmole types of diplopore, fluid distrbution has to the permeability that accompanies
Considerable influence, normal experiment method are difficult to carry out quantitative analyses to the water of different existences during gas drive water.
Experimental technique condition is to limit coal seam reservoirs gas and water permeability accurately one of key factor of measurement.Due to reservoir
Low hole, hypotonic feature, conventional reservoir relative permeability analysis method are missed for the measurement of fluid saturation in low-porosity and low-permeability reservoir
Larger, the experiment parameter of difference（Gas, fluid flow etc.）Obtain and there is uncertainty.Meanwhile, convection cell distribution and migration are advised
Rule does not reach dynamic monitoring effect, it is impossible to obtain the continuous Changing Pattern of dynamic of fluid distrbution.
Therefore need to invent a set of instrument determined suitable for low permeability reservoir relative permeability, accurately obtain fluid in experiment
The parameters such as flow, saturation, and dynamic monitoring is realized to fluid distrbution in experiment and flowing law.
The content of the invention
Satisfy for the fluid that low hole, hypotonic unconventional reservoir are measured to solve conventional reservoir relative permeability measuring instrument
With the larger problem of experiment parameter error such as degree, fluid flow, the present invention provides a kind of hyposmosis of combination nuclear magnetic resonance technique
Reservoir permeability measuring instrument, tests for the measurement of unconventional reservoir gas and water relative permeability, accurately provides test parameterss and reach
The purpose of dynamic monitoring is carried out to convection cell distribution and flowing law.
To realize above-mentioned target, the present invention is employed the following technical solutions：
A kind of low permeability reservoir measuring instrument for permeability rate of combination nuclear magnetic resonance technique, including hardware and software are described hard
Part is included without magnetic rock sample clamper, pressure resistant vessel, gas drier, electronic balance and gas flow surveying instrument, described to hold
The entrance point of pressure vessel is connected with gas boosting pump, and the port of export is connected without magnetic rock sample clamper with described, described without magnetic rock sample
One end of clamper is connected with the pressure resistant vessel, and the other end is connected with the gas drier, the gas drier
It is positioned on the electronic balance, one end of the gas drier is connected without magnetic rock sample clamper with described, the other end
It is connected with the gas flow surveying instrument；The software includes communicate acquisition module, data compilation module, data display mould
Block, data recordin module, experimentation control module and data export module.
Described is the core component of instrument provided by the present invention without magnetic rock sample clamper, by 2 pressure caps, 2 metal plugs,
2 radial direction seal rings, 2 axial sealing rings, 2 PEEK (Poly Ether Ether Ketone, polyether-ether-ketone) sample columns
Plug, PEEK clamp bodies, gum cover, confined pressure import, pressure source inlet and pressure source outlet composition.Referring to Fig. 2, described 2
PEEK samples plunger is coated with outside the PEEK samples plunger and rock sample for fixing rock sample to be measured from left and right two ends
The gum cover, the PEEK clamp bodies are wrapped in the outside of the gum cover, and above-mentioned part constitutes a cylindrical clamping
Device main body, respectively has a metal plug at the two ends of the clamp body, in each described metal plug and the glue
The joint portion of set is provided with an axial sealing ring, in the knot of each described metal plug and the PEEK clamp bodies
Conjunction portion is provided with a radial direction seal ring, respectively has a pressure cap in the outside of the metal plug, in left side metal plug
On the pressure source inlet is installed, the pressure source outlet is installed on the metal plug of right side, from the pressure source inlet,
Left side metal plug, left side PEEK sample plungers, rock sample, right side PEEK sample plungers, right side metal plug and pressure described in Jing
Source exports, and forms a fluid（Gas and liquid）Transmission channel, in the side of the PEEK clamp bodies, is provided with described
Confined pressure import, for applying confined pressure to the gum cover and its inclusion enclave.
It is described be placed in low-field nuclear magnetic resonance instrument, carrying out the quantitative measurement of fluid in sample without magnetic rock sample clamper and not
Produce interference signal amount.Detailed directions are：To be placed in low-field nuclear magnetic resonance instrument without magnetic rock sample clamper, carry out displacement test；
Nuclear magnetic signal measurement is not being carried out to rock sample in the same time in process of the test, while recording port of export gas gas production, two side pressures
The measurement data such as difference；The nuclear magnetic signal amount not in the same time for obtaining is converted into into the quality of water in rock sample, is used " JNB "
（Johnson-Bossler-Naumann）Method calculates rock sample relative permeability and water saturation.
The function of the pressure resistant vessel is to buffer and adjust gas pressure, to ensure the pressure without magnetic rock sample clamper
The gas of source inlet is supplied with constant pressure according to setting value.The pressure resistant vessel is by base, cylinder, import, sealing ring, pressure
Ring, upper plug head and outlet composition, the cylinder are arranged on the support, and the import is located at the bottom of the cylinder,
The top of the cylinder is provided with the upper plug head, is provided with sealing ring, institute between the upper plug head bottom and cylinder inboard wall
The outside of upper plug head is stated equipped with the pressure ring, the outlet is located at the top of the upper plug head.From the import, cylinder described in Jing
Body, upper plug head and outlet, form gas passage.The port of export of the pressure resistant vessel is equipped with cooling gas check valve, according to requirement of experiment
Inlet pressure setting pressure resistant vessel outlet pressure so that gas with constant pressure flow out.The pressure resistant vessel it is maximum pressure
For 10MPa.
The gas drier is a container bottle equipped with gas dryer, and two conduits in left and right are inserted with bottle stopper,
Left side conduit is connected with the pressure source outlet without magnetic rock sample clamper, the right conduit and the gas flow surveying instrument
It is connected.The gas drier is positioned on the electronic balance.
The water yield is produced in experimentation less, be difficult to measure the displacement water yield by conventional gas and water separation method, this device is adopted
Gas drying is carried out with desiccant, electronic balance measurement displacement water yield method carries out contrast verification with nuclear-magnetism method, while dry
Dryness body reduces gas flow measurement error.
The gas flow surveying instrument includes mechanical meters and soap bubble flowmeter two parts, and two effusion meters pass through one
Individual three-way valve is connected with the right conduit of the gas drier, and any time is selected using therein according to gas flow
One effusion meter, then uses soap bubble flowmeter instead when the too small mechanical meters of gas flow are difficult to measure, to improve measured value
Accuracy, uses mechanical meters when gas flow is larger, while gas outlet end can be using back pressure device control outlet
Side pressure force value.
The communication acquisition module is communicated with in-site measurement module, and communication data is given the data compilation module and entered
Row is processed；After the data compilation module is processed to the data that communication is returned, the live actual measured value for needing is obtained（Such as
Temperature, pressure etc.）；Actual measured value is shown, is checked for user by the data disaply moudle；The experimentation control module
Obtain after data from the data compilation module, other data are obtained through processing（Such as experimental data, experimental result etc.）, and
The display module is given by the data for obtaining to show, meanwhile, control the data recordin module record data, record data bag
Include actual measurement data and experimental data and experimental result etc.；The data export module is from the extracting data number for having recorded
According to exporting in form, check for user and process.
The operating process of instrument of the present invention is：
1st, the rock sample after saturation water is loaded into rock sample clamper, rock sample clamper is placed in low-field nuclear magnetic resonance instrument, even
Tap into outlet gas circuit；Add confined pressure to rock sample clamper using confined pressure pump.
2nd, it is displacement test inlet pressure to arrange pressure vessel port of export check valve pressure, opens source of the gas and gas boosting
Pump, to gas boosting in pressure resistant vessel to more than termination of pumping during displacement inlet pressure；Check valve is opened, gas is from check valve by carrying
For upstream pressure, air inlet valve is opened, gas drive water experiment is carried out.
3rd, not carrying out nuclear-magnetism measurement to rock sample in the same time, while using computer acquisition displacement time, displacement pressure reduction, just
Beginning sees gas point and accumulative gas flow data.
4th, pressure supplement is carried out to pressure vessel, it is ensured that gas pressure enters more than clamper in pressure vessel in experimentation
The setting pressure of mouth.
The advantages of the present invention are：
1st, the experiment parameters such as the displacement water yield during displacement test, gas flow can be accurately obtained, is accurately calculated
The relative permeability of low porosity and permeability reservoir；
2nd, in while relative permeability is obtained to rock sample, the distribution of different existence water and migration rule carry out fixed
Amount analysis；
3rd, experimental provision security performance is improved, while improving sampling time point degree of accuracy and improving data-handling capacity.
Description of the drawings
The invention will be further described with reference to the accompanying drawings and examples.
Fig. 1 is the fundamental diagram of instrument of the present invention.
In figure, 1 is helium tank, and 2 is dioxide bottle, and 3 are off valve, and 4 is gas cylinder air relief valve, and 5 is filter, and 6 are
Gas boosting pump, 7 is electromagnetic valve, and 8 is pressure gauge, and 9 is pressure-regulating valve, and 10 is Oil-gas Separation pump, and 11 is air pump, and 12 is three
Port valve, 13 is pressure resistant vessel, and 14 is check valve, and 15 is relief valve, and 16 is pressure transducer, and 17 is temperature sensor, and 18 are
PEEK rock sample clampers, 19 is confined pressure pump, and 20 is water tumbler, and 21 is back-pressure valve, and 22 is backpressure pump, and 23 is gas flowmeter, and 24 are
Gas drier, 25 is electronic balance, and 26 is soap bubble flowmeter, and 27 is data acquisition unit, and 28 is computer.Wherein, 13,
18th, 23,24,25,26 is hardware component of the present invention, and software module of the present invention is installed in computer.
Fig. 2 is the structural map without magnetic rock sample clamper for inventing the PEEK materials.
In figure, 1 is pressure cap, and 2 is metal plug, and 3 is radial direction seal ring, and 4 is confined pressure import, and 5 is PEEK clamp bodies,
6 is rock sample, and 7 is gum cover, and 8 is metal plug, and 9 is pressure source inlet, and 10 is axial sealing ring, and 11 is PEEK sample plungers, 12
It is pressure source outlet.
Fig. 3 is the invention inlet port pressure vessel structure chart.
In figure, 1 is outlet, and 2 is upper plug head, and 3 is pressure ring, and 4 is sealing ring, and 5 is cylinder, and 6 is import, and 7 is base.
Fig. 4 is block diagram for software modules of the present invention.
In figure, 1 is communication acquisition module, and 2 is data compilation module, and 3 is data disaply moudle, and 4 is experimentation control
Module, 5 is data recordin module, and 6 is data export module.
Specific embodiment
Embodiment 1
Referring to Fig. 1, Fig. 4, a kind of low permeability reservoir measuring instrument for permeability rate of combination nuclear magnetic resonance technique, including Hardware Subdivision
Part and software module, the hardware component include without magnetic rock sample clamper, pressure resistant vessel, gas drier, electronic balance and
Gas flow surveying instrument, the entrance point of the pressure resistant vessel are connected with gas boosting pump, and the port of export is pressed from both sides without magnetic rock sample with described
Holder is connected, and described one end without magnetic rock sample clamper is connected with the pressure resistant vessel, and the other end is filled with the gas drying
Put connected, the gas drier is positioned on the electronic balance, one end of the gas drier and the nothing
Magnetic rock sample clamper is connected, and the other end is connected with the gas flow surveying instrument；The software include communicate acquisition module,
Data compilation module, data disaply moudle, data recordin module, experimentation control module and data export module.
Referring to Fig. 2, described is the core component of instrument provided by the present invention without magnetic rock sample clamper, by 2 pressure caps, 2
Metal plug, 2 radial direction seal rings, 2 axial sealing rings, 2 PEEK sample plungers, PEEK clamp bodies, gum cover, confined pressures
Import, pressure source inlet and pressure source outlet composition.2 PEEK samples plungers are for fixing rock to be measured from left and right two ends
Sample, is coated with the gum cover outside the PEEK samples plunger and rock sample, and the PEEK clamp bodies are wrapped in described
The outside of gum cover, above-mentioned part constitute a cylindrical clamp body, respectively have one at the two ends of the clamp body
The metal plug, is provided with the axial sealing ring with the joint portion of the gum cover in each described metal plug,
Each described metal plug is provided with a radial direction seal ring with the joint portion of the PEEK clamp bodies, in the gold
Respectively there is a pressure cap outside of category plug, is provided with the pressure source inlet, in right side metal plug on the metal plug of left side
On the pressure source outlet is installed, from the pressure source inlet, left side metal plug described in Jing, left side PEEK sample plungers,
Rock sample, right side PEEK sample plungers, right side metal plug and pressure source outlet, form a fluid（Gas and liquid）Transmission is logical
Road, in the side of the PEEK clamp bodies, is provided with the confined pressure import, for applying to the gum cover and its inclusion enclave
Confined pressure.
It is described be placed in low-field nuclear magnetic resonance instrument, carrying out the quantitative measurement of fluid in sample without magnetic rock sample clamper and not
Produce interference signal amount.Detailed directions are：To be placed in low-field nuclear magnetic resonance instrument without magnetic rock sample clamper, carry out displacement test；
Nuclear magnetic signal measurement is not being carried out to rock sample in the same time in process of the test, while recording port of export gas gas production, two side pressures
The measurement data such as difference；The nuclear magnetic signal amount not in the same time for obtaining is converted into into the quality of water in rock sample, is used " JNB "
（Johnson-Bossler-Naumann）Method calculates rock sample relative permeability and water saturation.
Referring to Fig. 3, the function of the pressure resistant vessel is to buffer and adjust gas pressure, described without the clamping of magnetic rock sample to ensure
The gas of the pressure source inlet of device is supplied with constant pressure according to setting value.The pressure resistant vessel is by base, cylinder, import, close
Seal, pressure ring, upper plug head and outlet composition, the cylinder are arranged on the support, and the import is located at the cylinder
Bottom, is provided with the upper plug head on the top of the cylinder, is provided with close between the upper plug head bottom and cylinder inboard wall
Seal, the outside of the upper plug head are equipped with the pressure ring, and the outlet is located at the top of the upper plug head.From the import, Jing
The cylinder, upper plug head and outlet, form gas passage.The port of export of the pressure resistant vessel is equipped with cooling gas check valve, according to reality
Test the inlet pressure setting pressure resistant vessel outlet pressure of requirement so that gas is flowed out with constant pressure.The pressure resistant vessel is most
It is big pressure for 10MPa.
Referring to Fig. 1, the gas drier is a container bottle equipped with gas dryer, and left and right two is inserted with bottle stopper
Root conduit, left side conduit are connected with the pressure source outlet without magnetic rock sample clamper, the right conduit and the gas flow
Measurement apparatus are connected.The gas drier is positioned on the electronic balance.
The water yield is produced in experimentation less, be difficult to measure the displacement water yield by conventional gas and water separation method, this device is adopted
Gas drying is carried out with desiccant, electronic balance measurement displacement water yield method carries out contrast verification with nuclear-magnetism method, while dry
Dryness body reduces gas flow measurement error.
Referring to Fig. 1, the gas flow surveying instrument includes mechanical meters and soap bubble flowmeter two parts, two flows
Meter is connected with the right conduit of the gas drier by a three-way valve, and any time selects to make according to gas flow
One of effusion meter is used, soap bubble flowmeter is then used instead when the too small mechanical meters of gas flow are difficult to measure, to improve
The accuracy of measured value, uses mechanical meters, while gas outlet end can use back pressure device when gas flow is larger
Control outlet pressures value.
Referring to Fig. 4, the communication acquisition module is communicated with in-site measurement module, and it is whole that communication data gives the data
Reason module is processed；After the data compilation module is processed to the data that communication is returned, the scene for obtaining needing is actual
Measured value（Such as temperature, pressure etc.）；Actual measured value is shown, is checked for user by the data disaply moudle；It is described to test
Process control module is obtained after data from the data compilation module, obtains other data through processing（Such as experimental data, experiment
As a result etc.）, and give the display module by the data for obtaining and show, meanwhile, the data recordin module record data is controlled,
Record data includes actual measurement data and experimental data and experimental result etc.；The data export module is from the number for having recorded
Export in form according to middle extraction data, check for user and process.
Finally it should be noted that：Obviously, above-described embodiment is only intended to clearly illustrate example of the present invention, and and
The non-restriction to embodiment.For those of ordinary skill in the field, can also do on the basis of the above description
Go out the change or variation of other multi-forms.There is no need to be exhaustive to all of embodiment.And thus drawn
Among the obvious change stretched out or variation are still in protection scope of the present invention.
Claims (3)
1. a kind of low permeability reservoir measuring instrument for permeability rate of combination nuclear magnetic resonance technique, it is characterised in that：The instrument includes
Hardware and software, the hardware are included without magnetic rock sample clamper, pressure resistant vessel, gas drier, electronic balance and gas stream
Measuring device, the entrance point of the pressure resistant vessel are connected with gas boosting pump, and the port of export is with described without magnetic rock sample clamper phase
Connection, described one end without magnetic rock sample clamper are connected with the pressure resistant vessel, and the other end is connected with the gas drier,
The gas drier is positioned on the electronic balance, and one end of the gas drier is pressed from both sides without magnetic rock sample with described
Holder is connected, and the other end is connected with the gas flow surveying instrument；The software includes communicate acquisition module, data compilation
Module, data disaply moudle, data recordin module, experimentation control module and data export module；
It is described without magnetic rock sample clamper by 2 pressure caps, 2 metal plugs, 2 radial direction seal rings, 2 axial sealing rings, 2
PEEK sample plungers, PEEK clamp bodies, gum cover, confined pressure import, pressure source inlet and pressure source outlet composition；Described 2
PEEK samples plunger is coated with outside the PEEK samples plunger and rock sample for fixing rock sample to be measured from left and right two ends
The gum cover, the PEEK clamp bodies are wrapped in the outside of the gum cover, and above-mentioned part constitutes a cylindrical clamping
Device main body, respectively has a metal plug at the two ends of the clamp body, in each described metal plug and the glue
The joint portion of set is provided with an axial sealing ring, in the knot of each described metal plug and the PEEK clamp bodies
Conjunction portion is provided with a radial direction seal ring, respectively has a pressure cap in the outside of the metal plug, in left side metal plug
On the pressure source inlet is installed, the pressure source outlet is installed on the metal plug of right side, from the pressure source inlet,
Left side metal plug, left side PEEK sample plungers, rock sample, right side PEEK sample plungers, right side metal plug and pressure described in Jing
Source exports, and forms a fluid delivery channel, in the side of the PEEK clamp bodies, is provided with the confined pressure import, uses
In to the gum cover and its inclusion enclave applying confined pressure；
The pressure resistant vessel is made up of base, cylinder, import, sealing ring, pressure ring, upper plug head and outlet, and the cylinder is arranged on
On the support, the import is located at the bottom of the cylinder, is provided with the upper plug head on the top of the cylinder, in institute
State and sealing ring is installed between upper plug head bottom and cylinder inboard wall, the outside of the upper plug head is equipped with the pressure ring, the outlet
Positioned at the top of the upper plug head；From the import, cylinder, upper plug head and outlet described in Jing form gas passage；The pressure-bearing
The port of export of container is equipped with cooling gas check valve, sets pressure resistant vessel outlet pressure according to the inlet pressure of requirement of experiment so that gas
Body is flowed out with constant pressure；The pressure resistant vessel it is maximum pressure for 10MPa；
The gas drier is a container bottle equipped with gas dryer, and two conduits in left and right, the left side are inserted with bottle stopper
Conduit is connected with the pressure source outlet without magnetic rock sample clamper, and the right conduit is connected with the gas flow surveying instrument
Connect；The gas drier is positioned on the electronic balance；In experimentation produce the water yield it is less, by conventional gas,
Water separating method is difficult to measure the displacement water yield, carries out gas drying, electronic balance measurement displacement water yield method using desiccant
Contrast verification is carried out with nuclear-magnetism method, while dry gas reduce gas flow measurement error；
The gas flow surveying instrument includes mechanical meters and soap bubble flowmeter two parts, and two effusion meters pass through one three
Port valve is connected with the right conduit of the gas drier, and any time selects to use one of those according to gas flow
Effusion meter, then uses soap bubble flowmeter, to improve the accurate of measured value when the too small mechanical meters of gas flow are difficult to measure
Degree, uses mechanical meters when gas flow is larger, while gas outlet end can be using back pressure device control outlet side pressure
Force value.
2. a kind of low permeability reservoir measuring instrument for permeability rate of combination nuclear magnetic resonance technique as claimed in claim 1, its feature
It is：The communication acquisition module is communicated with in-site measurement module, and communication data is given the data compilation module and carried out
Process；After the data compilation module is processed to the data that communication is returned, the live actual measured value for needing is obtained；It is described
Actual measured value is shown, is checked for user by data disaply moudle；The experimentation control module is from the data compilation mould
After block obtains data, obtain experimental data and experimental result through processing, and give the display module by the data for obtaining showing
Show, meanwhile, control the data recordin module record data, the data of record include actual measurement data and experimental data and
Experimental result；The data export module is exported in form from the extracting data data for having recorded, checks He Chu for user
Reason.
3. a kind of low permeability reservoir measuring instrument for permeability rate of combination nuclear magnetic resonance technique as claimed in claim 1, its feature
It is：It is described to be placed in low-field nuclear magnetic resonance instrument, carrying out the quantitative measurement of fluid in sample without magnetic rock sample clamper and do not produce
Interference signal amount, detailed directions are：To be placed in low-field nuclear magnetic resonance instrument without magnetic rock sample clamper, carry out displacement test；Test
During not carrying out nuclear magnetic signal measurement to rock sample in the same time, while recording port of export gas gas production, two ends pressure reduction etc.
Measurement data；The nuclear magnetic signal amount not in the same time for obtaining is converted into into the quality of water in rock sample, rock sample is calculated with " JNB " method
Relative permeability and water saturation；
Operating process is：
1) by after saturation water rock sample load rock sample clamper, rock sample clamper is placed in low-field nuclear magnetic resonance instrument, connect into
Outlet gas circuit；Add confined pressure to rock sample clamper using confined pressure pump；
2) it is displacement test inlet pressure to arrange pressure vessel port of export check valve pressure, opens source of the gas and gas booster pump, gives
In pressure resistant vessel, gas boosting is to more than termination of pumping during displacement inlet pressure；Check valve is opened, gas is from check valve by offer
Trip pressure, opens air inlet valve, carries out gas drive water experiment；
3) nuclear-magnetism measurement is not being carried out to rock sample in the same time, while using computer acquisition displacement time, displacement pressure reduction, initially seeing
Gas point and accumulative gas flow data；
4) pressure supplement is carried out to pressure vessel, it is ensured that gas pressure is more than clamper import in pressure vessel in experimentation
Pressure is set.
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| CN101458218A (en) * | 2008-12-28 | 2009-06-17 | 大连理工大学 | Carbon dioxide oil-displacing nmr imaging detection device |
| CN101907586A (en) * | 2010-06-11 | 2010-12-08 | 中国石油天然气股份有限公司 | High-temperature high-pressure clamp for testing rock core by nuclear magnetic resonance |
| CN201780251U (en) * | 2010-07-26 | 2011-03-30 | 长江大学 | Dynamic contamination assessing experimental instrument for coal seam core under high-temperature and high-pressure conditions |
| CN102288629A (en) * | 2011-07-01 | 2011-12-21 | 中联煤层气国家工程研究中心有限责任公司 | Core holder |
| WO2013037093A1 (en) * | 2011-09-14 | 2013-03-21 | 中国石油天然气股份有限公司 | Nuclear magnetic resonance rock sample analysis method and instrument with constant gradient field |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101458218A (en) * | 2008-12-28 | 2009-06-17 | 大连理工大学 | Carbon dioxide oil-displacing nmr imaging detection device |
| CN101907586A (en) * | 2010-06-11 | 2010-12-08 | 中国石油天然气股份有限公司 | High-temperature high-pressure clamp for testing rock core by nuclear magnetic resonance |
| CN201780251U (en) * | 2010-07-26 | 2011-03-30 | 长江大学 | Dynamic contamination assessing experimental instrument for coal seam core under high-temperature and high-pressure conditions |
| CN102288629A (en) * | 2011-07-01 | 2011-12-21 | 中联煤层气国家工程研究中心有限责任公司 | Core holder |
| WO2013037093A1 (en) * | 2011-09-14 | 2013-03-21 | 中国石油天然气股份有限公司 | Nuclear magnetic resonance rock sample analysis method and instrument with constant gradient field |
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