CN114428095A - Nuclear magnetic resonance displacement experimental device and method based on ceramic clamp holder - Google Patents
Nuclear magnetic resonance displacement experimental device and method based on ceramic clamp holder Download PDFInfo
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Abstract
The invention provides a nuclear magnetic resonance displacement experimental device and a nuclear magnetic resonance displacement experimental method based on a ceramic holder, and the nuclear magnetic resonance displacement experimental device comprises the following steps: the core holder, the injection device and the pressure control device; the core holder comprises a holder body made of ceramic materials and a temperature control system, the holder body is arranged in the nuclear magnetic system, a cavity for accommodating a core sample is arranged in the holder body, and the temperature control system is connected to the holder body and used for monitoring and controlling the temperature in the cavity; the injection device is connected to the inlet of the core holder and is used for injecting fluid into the cavity of the core holder; the pressure control device is connected to the outlet of the core holder and is used for controlling the pressure in the cavity. The invention can simulate the process of fluid/gas passing through reservoir rock under various complex stratum conditions, monitor the process of fluid/gas passing through rock pores in real time, faithfully reflect the flow rule and mechanism of multiphase fluid, and has important practical significance for the development of technical means for improving the recovery ratio of oil and gas fields.
Description
Technical Field
The invention belongs to the field of oil and gas field exploration and development, and particularly relates to a nuclear magnetic resonance displacement experimental device and method based on a ceramic clamp holder.
Background
Stratum experiments in simulated oil and gas exploration and development usually need to restore underground high-temperature and high-pressure conditions, and most of the conventional displacement experiment devices adopt a rock core holder made of Hastelloy, fluororubber and Polyetheretherketone (PEEK). The metal core holder can realize high-temperature and high-pressure experimental conditions, but the metal core holder can prevent Nuclear Magnetic Resonance (NMR) signals in a core sample from being detected by an RF probe when being matched with a nuclear magnetic resonance instrument, and in addition, eddy current can be generated in metal by fast switching of magnetic field gradient, so that the obtained nuclear magnetic image is distorted.
However, since metal holders such as hastelloy and the like can bear higher temperature and pressure and have excellent characteristics such as acid-alkali fluid resistance, after nuclear magnetic signals and experimental methods are improved, a large number of displacement experimental devices are still adopted by metal holders, for example, the holders in the invention patent CN201910457379.1 "high-temperature and high-pressure nuclear magnetic resonance core holder" are made of titanium alloy materials, while the invention patent CN201910656890.4 claims "a high-temperature and high-pressure reverse imbibition on-line monitoring experimental device and experimental method for a core holder used in cooperation with nuclear magnetic resonance" are made of hastelloy materials; in addition, "nonmagnetic core holders" developed gradually in recent years, and had a tendency to replace metal core holders under nuclear magnetic probes, and the core holders equipped with the nuclear magnetic resonance displacement experimental apparatus as described in patent CN201710761207.4 and patent CN201811616981.7 were "nonmagnetic core holders". However, in patent CN201010205347.1 and patent CN201710270757.6, it is clear that the holder is made of fluororubber or polytetrafluoroethylene, but the fluororubber cannot be exposed to acidic fluid for a long time, and is poor in acid and alkali resistance, and the polytetrafluoroethylene material has better high temperature resistance and acid and alkali resistance, but is poor in pressure resistance, and polytetrafluoroethylene with a common thickness is not suitable for use under the condition of more than 5MPa, and cannot meet the simulation of underground environment.
At present, an ideal and mainstream displacement experiment device generally adopts a core holder made of Polyetheretherketone (PEEK), and a core holder cylinder in the 'nuclear magnetic resonance online testing device for high-temperature and high-pressure rock physical properties and seepage mechanism' claimed in patent No. cn201510186120.x is made of PEEK. Although the PEEK material described in this patent can operate at a pressure of 30MPa and a temperature of 100 ℃, core holders made of PEEK material generally operate at a temperature of 60 ℃ or less and at a pressure of 20MPa or less. The working conditions of the experimental device adopting the core holder cannot meet the simulation of the formation temperature and pressure of most oil and gas fields, particularly deep oil and gas fields in the west.
Therefore, the nuclear magnetic resonance displacement experiment device and method based on the ceramic clamp holder are expected to be developed, temperature and pressure conditions of various oil and gas reservoirs can be simulated, and dynamic monitoring on the flowing rule and mechanism of fluid in the core column can be realized.
Disclosure of Invention
The invention aims to provide a nuclear magnetic resonance displacement experimental device and a nuclear magnetic resonance displacement experimental method, which can simulate the temperature and pressure conditions of various oil and gas reservoirs, can be used for carrying out displacement experimental device under the temperature and pressure conditions of various reservoirs and realize the online monitoring of fluid in a core column.
In order to achieve the above object, the present invention provides a nuclear magnetic resonance displacement experiment apparatus based on a ceramic clamper, comprising: the core holder, the injection device and the pressure control device;
the core holder comprises a holder body made of ceramic materials and a temperature control system, the holder body is arranged in a nuclear magnetic system, a cavity for accommodating a core sample is arranged in the holder body, and the temperature control system is connected to the holder body and used for monitoring and controlling the temperature in the cavity;
the injection device is connected to the inlet of the core holder and is used for injecting fluid into the cavity of the core holder;
the pressure control device is connected to an outlet of the core holder and is used for controlling the pressure in the cavity.
Optionally, two ends of the cavity inside the holder body are respectively provided with a double-layer membrane filtering device.
Optionally, the temperature control system comprises a heating resistance wire, a temperature sensor and a temperature controller, the heating resistance wire and the temperature sensor are arranged in the inner wall of the holder body, the heating resistance wire and the temperature sensor are electrically connected with the temperature controller, and the temperature controller controls the operation of the heating resistance wire according to the temperature detected by the temperature sensor.
Optionally, the nuclear magnetic system comprises a nuclear magnetic probe connected to the host, the nuclear magnetic probe has a C-shaped opening, and the core holder is disposed in the C-shaped opening.
Optionally, the injection device comprises a solution bottle and an injection pump, wherein the solution bottle is connected to the inlet of the core holder through the injection pump;
the injection pump is a constant-speed constant-pressure pump, and the solution bottles are multiple and different in capacity.
Optionally, the pressure control device comprises a back-pressure valve, a pressure gauge and a hand-operated pump, wherein a liquid inlet of the back-pressure valve is connected to an outlet of the core holder, an air inlet of the back-pressure valve is connected to the hand-operated pump, and the pressure gauge is arranged between the back-pressure valve and the hand-operated pump;
the back pressure valve with still be equipped with the valve between the hand pump, the valve is located being close to of manometer one side of back pressure valve.
Optionally, the sampling device further comprises a three-way valve and a micro-flow control valve, wherein two ports of the three-way valve are connected to an outlet pipeline of the core holder, and the micro-flow control valve is arranged on a third port of the three-way valve.
Optionally, valves are disposed between the injection device and the core holder, and between the core holder and the pressure control device.
The invention also provides a nuclear magnetic resonance displacement experiment method, which utilizes the nuclear magnetic resonance displacement experiment device and comprises the following steps:
1) preparing a solution required by an experiment;
2) placing a core sample in a cavity of the core holder;
3) setting the pressure of the pressure control device as the pressure required by the experiment;
4) starting the nuclear magnetic system to monitor the process of fluid passing through the rock pores in real time;
5) starting the injection device, sequentially opening an inlet and an outlet of the core holder when the injection pressure of the injection device reaches the pressure required by the experiment, injecting the solution into the core holder by using the injection device, and acquiring a nuclear magnetic resonance signal at fixed intervals, wherein the nuclear magnetic resonance signal shows the condition that the fluid passes through the core sample;
6) after the pressure in the device is stable and fluid flows out at a constant speed, the temperature control system is utilized to heat the interior of the rock core holder to the experimental temperature and keep the temperature constant, and nuclear magnetic resonance signals are acquired at intervals of fixed time intervals, wherein the nuclear magnetic resonance signals show the condition that the fluid passes through the rock core sample.
Optionally, the nuclear magnetic resonance displacement experimental device further comprises a sampling device, the sampling device comprises a three-way valve and a micro-flow control valve, two ports of the three-way valve are connected to an outlet pipeline of the core holder, and the micro-flow control valve is arranged on a third port of the three-way valve;
the step 6) further comprises periodically receiving a fluid sample through the micro-flow control valve for post-analysis testing.
The invention has the beneficial effects that: the nuclear magnetic resonance displacement experimental device based on the ceramic holder can meet the temperature and pressure conditions of various oil and gas reservoirs found at present, so that the displacement experiment can be carried out under the temperature and pressure conditions of the reservoirs, the nuclear magnetic signals are hardly affected by noise, the on-line monitoring of fluid in a core column can be realized, the device has very good heat preservation and heat insulation properties, the stability of the experimental temperature can be ensured by the built-in temperature control system, the contradiction that the requirements of the nuclear magnetic resonance signals on the materials of the experimental device and the materials cannot meet the simulation of the high-temperature pressure stratum conditions is solved, the displacement mechanism of water/gas/chemical flooding for improving the recovery ratio under the real reaction condition is adopted, and the experimental basis and the theoretical basis are provided for the water/gas/chemical flooding technology for improving the recovery ratio.
Additional features and advantages of the invention will be set forth in the detailed description which follows.
Drawings
The above and other objects, features and advantages of the present invention will become more apparent by describing in more detail exemplary embodiments thereof with reference to the attached drawings, in which like reference numerals generally represent like parts throughout.
FIG. 1 shows a schematic block diagram of a ceramic holder-based NMR displacement experiment apparatus according to one embodiment of the invention.
Description of the reference numerals
1. A solution bottle; 2. an injection pump; 3. a valve; 4. heating resistance wires and temperature sensors; 5. a nuclear magnetic probe; 6. a core sample; 7. a holder body; 8. a temperature controller; 9. a host; 10. a three-way valve; 11. a micro flow control valve; 12. a back pressure valve; 13. a pressure gauge; 14. a hand pump.
Detailed Description
Preferred embodiments of the present invention will be described in more detail below. While the following describes preferred embodiments of the present invention, it should be understood that the present invention may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.
The invention provides a nuclear magnetic resonance displacement experimental device based on a ceramic holder, which comprises: the core holder, the injection device and the pressure control device;
the core holder comprises a holder body made of ceramic materials and a temperature control system, the holder body is arranged in the nuclear magnetic system, a cavity for accommodating a core sample is arranged in the holder body, and the temperature control system is connected to the holder body and used for monitoring and controlling the temperature in the cavity;
the injection device is connected to the inlet of the core holder and is used for injecting fluid into the cavity of the core holder;
the pressure control device is connected to the outlet of the core holder and is used for controlling the pressure in the cavity.
Specifically, a rock core to be tested is placed in a rock core holder, the rock core holder is placed in a nuclear magnetic system, the pressure in the rock core holder reaches a value required by an experiment through a pressure control device, experiment fluid is injected into the rock core holder through an injection device, and a nuclear magnetic resonance signal is acquired at intervals of fixed time intervals to acquire the condition that the fluid passes through a rock core sample;
the nuclear magnetic resonance displacement experiment device can meet the temperature and pressure conditions of various oil and gas reservoirs found at present, so that displacement experiments can be carried out under the temperature and pressure conditions of reservoirs, a nuclear magnetic signal is almost free from noise influence, the on-line monitoring of fluid in a core column can be realized, the device has very good heat insulation performance, a temperature control system arranged in a core holder can ensure the stability of the experiment temperature, the contradiction that the material requirement of the nuclear magnetic resonance signal on the experiment device material and the material can not meet the simulation of the high-temperature pressure stratum condition is solved, the displacement mechanism of water/gas/chemical displacement for improving the recovery ratio under the real condition is reflected, and the experiment basis and the theoretical basis are provided for the water/gas/chemical displacement recovery ratio improving technology;
furthermore, the clamp holder body is made of zirconia ceramics, and experimental conditions of working temperature of 150 ℃ and working pressure of 70MPa can be realized.
As an alternative, two ends of a cavity inside the clamp holder body are respectively provided with a double-layer membrane filtering device.
Specifically, placing double-deck diaphragm filter equipment can guarantee that the rock sample particle does not run off, avoids experimental apparatus to block up.
As an alternative scheme, the temperature control system comprises a heating resistance wire, a temperature sensor and a temperature controller, the heating resistance wire and the temperature sensor are arranged in the inner wall of the holder body, the heating resistance wire and the temperature sensor are electrically connected with the temperature controller, and the temperature controller controls the operation of the heating resistance wire according to the temperature detected by the temperature sensor.
Specifically, adopt the heating resistor silk to heat the inner wall of rock core holder, can make the rock core be heated evenly, and the temperature of rock core holder adopts temperature controller intelligent control, can effectively avoid rock core temperature difference in the experimentation too big and influence the experimental result.
Alternatively, the nuclear magnetic system comprises a nuclear magnetic probe connected to the host, the nuclear magnetic probe is provided with a C-shaped opening, and the core holder is arranged in the C-shaped opening.
Specifically, the shape of the nuclear magnetic probe is not limited to the C-shape, and may be any suitable nuclear magnetic probe.
As an alternative, the injection device comprises a solution bottle and an injection pump, wherein the solution bottle is connected to the inlet of the core holder through the injection pump;
the injection pump is a constant-speed constant-pressure pump, and the solution bottles are multiple and have different capacities.
Specifically, the solution bottle is used for storing fluid for the experiment, before the experiment, can select the solution bottle of suitable capacity according to the experiment demand, guarantees that the solution of once or several experimental studies is the solution of same time configuration, guarantees that the experimentation lasts and the experimental result can contrast.
As an alternative scheme, the pressure control device comprises a back-pressure valve, a pressure gauge and a hand-operated pump, wherein a liquid inlet of the back-pressure valve is connected to an outlet of the rock core holder, an air inlet of the back-pressure valve is connected to the hand-operated pump, and the pressure gauge is arranged between the back-pressure valve and the hand-operated pump;
still be equipped with the valve between backpressure valve and the hand pump, the valve is located one side that is close to the backpressure valve of manometer.
As an alternative, the sampling device comprises a three-way valve and a micro-flow control valve, two ports of the three-way valve are connected to an outlet pipeline of the core holder, and the micro-flow control valve is arranged on a third port of the three-way valve.
Particularly, the sampling device is arranged, so that the fluid can be conveniently extracted in the experimental process for analysis and detection, and functions and experimental items are expanded.
As an alternative, valves are arranged between the injection device and the core holder and between the core holder and the pressure control device.
The invention also discloses a nuclear magnetic resonance displacement experimental method, which utilizes the nuclear magnetic resonance displacement experimental device based on the ceramic clamper and comprises the following steps:
1) preparing a solution required by an experiment;
2) placing a core sample in a cavity of a core holder;
3) setting the pressure of the pressure control device as the pressure required by the experiment;
4) starting a nuclear magnetic system to monitor the process of fluid passing through the rock pores in real time;
5) starting an injection device, sequentially opening an inlet and an outlet of a core holder when the injection pressure of the injection device reaches the pressure required by the experiment, injecting a solution into the core holder by using the injection device, and acquiring a nuclear magnetic resonance signal at fixed intervals, wherein the nuclear magnetic resonance signal shows the condition that fluid passes through a core sample;
6) after the pressure in the device is stable and fluid flows out at a constant speed, the temperature control system is utilized to heat the interior of the rock core holder to the experimental temperature and keep the temperature constant, nuclear magnetic resonance signals are acquired at fixed intervals, and the nuclear magnetic resonance signals show the condition that the fluid passes through the rock core sample.
Specifically, the method can meet the requirements of an online observation displacement experiment of a high-temperature and high-pressure stratum environment, the process of fluid passing through rock pores is monitored in real time, the experiment result is visual, and the operation is simple.
As an alternative, the nuclear magnetic resonance displacement experimental device further comprises a sampling device, wherein the sampling device comprises a three-way valve and a micro-flow control valve, two ports of the three-way valve are connected to an outlet pipeline of the rock core holder, and the micro-flow control valve is arranged on a third port of the three-way valve;
step 6) also includes periodically receiving the fluid sample through the microfluidic control valve for later analysis testing.
Example 1
Fig. 1 shows a schematic structural diagram of the nuclear magnetic resonance displacement experiment apparatus based on a ceramic clamper according to the present embodiment.
As shown in fig. 1, the holder body 7 is disposed in a C-shaped opening of the nuclear magnetic probe 5, and the nuclear magnetic probe 5 is connected to a main machine 9; a cavity for containing the core sample 6 is arranged in the holder body 7, two ends of the cavity are respectively provided with a double-layer membrane filtering device, a heating resistance wire and a temperature sensor 4 are arranged in the inner wall of the holder body 7, the heating resistance wire and the temperature sensor 4 are electrically connected with a temperature controller 8, and the temperature controller 8 controls the operation of the heating resistance wire according to the temperature detected by the temperature sensor; the solution bottle 1 is connected to the inlet of the holder body 7 through the injection pump 2 and is used for injecting fluid into the cavity of the holder body 7, wherein the injection pump 2 is a constant-speed constant-pressure pump, and the solution bottles 1 are provided with different capacities and are used for replacement;
the sampling device comprises a three-way valve 10 and a micro-flow control valve 11, two ports of the three-way valve 10 are connected to an outlet pipeline of the holder body 7, and the micro-flow control valve 11 is arranged on a third port of the three-way valve 10; the back pressure valve 12 is arranged on an outlet pipeline of the holder body 7 and is located at the downstream of the three-way valve 10, an air inlet of the back pressure valve 12 is connected to the hand pump 14, the pressure gauge 13 is arranged between the back pressure valve 12 and the hand pump 14, and the valve 3 is further arranged between the pressure gauge 13 and the back pressure valve 12.
In addition, valves 3 are arranged between the injection pump 2 and the clamp body 7 and between the three-way valve 10 and the back pressure valve 12, and hastelloy pipelines are adopted as fluid pipelines in the device.
The device can simulate the process of fluid/gas passing through reservoir rock under the condition of complex formation in China, monitors the process of fluid/gas passing through rock pores in real time, reflects the flowing rule and mechanism of multiphase fluid faithfully, and has important practical significance for the development of technical means for improving the recovery ratio of oil and gas fields.
Example 2
In this embodiment, the nmr displacement experiment apparatus in example 1 is used, and an open fluid experiment at 100 ℃ and 10MPa is performed with a core sample of sandstone as a study subject, the fluid is 0.1mol/L Nacl solution, and the flow rate is 0.1 ml/min. The experimental procedure was as follows:
1) preparing 5L of 0.1mol/L NaCl saline solution, filtering and storing in a solution bottle;
2) placing a core sample in a cavity of a core holder, and sealing ports at two ends of the core holder;
3) setting the pressure of a back pressure valve to 10Mpa by using a hand pump, and closing all valves on the experimental device;
4) starting a nuclear magnetic system, and recording 1 nuclear magnetic resonance signal every 15 minutes to monitor the process of fluid passing through the rock pores in real time;
5) starting an injection pump, setting the injection pump to be in a constant speed state, setting the flow rate to be 0.1ml/min, and when the injection pressure of the injection pump reaches 10MPa, sequentially opening valves at the inlet end and the outlet end of a rock core holder according to the flow direction of fluid to inject Nacl solution into the rock core holder, and acquiring a nuclear magnetic resonance signal at fixed intervals, wherein the nuclear magnetic resonance signal shows the condition that the fluid passes through a rock core sample;
6) after the pressure in the device is stable and fluid flows out at a constant speed, switching on a power supply of a temperature control meter, setting the heating temperature to be 100 degrees, slowly raising the temperature in the core holder to 100 ℃ by using a heating resistance wire and keeping the temperature constant, and acquiring a nuclear magnetic resonance signal at fixed intervals, wherein the nuclear magnetic resonance signal shows the condition that the fluid passes through a core sample;
7) receiving a fluid sample through a micro-flow control valve at regular intervals for later analysis and test;
8) and after the reaction is finished, the heating resistance wire, the injection pump and each valve are closed in sequence.
Having described embodiments of the present invention, the foregoing description is intended to be exemplary, not exhaustive, and not limited to the embodiments disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments.
Claims (10)
1. The utility model provides a nuclear magnetic resonance displacement experimental apparatus based on ceramic holder which characterized in that includes: the core holder, the injection device and the pressure control device;
the core holder comprises a holder body made of ceramic materials and a temperature control system, the holder body is arranged in a nuclear magnetic system, a cavity for accommodating a core sample is arranged in the holder body, and the temperature control system is connected to the holder body and used for monitoring and controlling the temperature in the cavity;
the injection device is connected to the inlet of the core holder and is used for injecting fluid into the cavity of the core holder;
the pressure control device is connected to an outlet of the core holder and is used for controlling the pressure in the cavity.
2. The nuclear magnetic resonance displacement experiment device based on the ceramic holder according to claim 1, wherein the holder body is made of zirconia ceramic, and two ends of a cavity inside the holder body are respectively provided with a double-layer membrane filtering device.
3. The nuclear magnetic resonance displacement experiment device based on the ceramic holder according to claim 1, wherein the temperature control system comprises a heating resistance wire, a temperature sensor and a temperature controller, the heating resistance wire and the temperature sensor are arranged in the inner wall of the holder body, the heating resistance wire and the temperature sensor are electrically connected with the temperature controller, and the temperature controller controls the operation of the heating resistance wire according to the temperature detected by the temperature sensor.
4. The ceramic holder-based nmr displacement experiment device of claim 1, wherein the nmr system comprises a nmr probe connected to a host, the nmr probe having a C-port, the core holder being disposed in the C-port.
5. The nuclear magnetic resonance displacement experiment device based on the ceramic holder according to claim 1, wherein the injection device comprises a solution bottle and an injection pump, and the solution bottle is connected to the inlet of the core holder through the injection pump;
the injection pump is a constant-speed constant-pressure pump, and the solution bottles are multiple and different in capacity.
6. The nuclear magnetic resonance displacement experiment device based on the ceramic holder according to claim 1, wherein the pressure control device comprises a back-pressure valve, a pressure gauge and a hand-operated pump, a liquid inlet of the back-pressure valve is connected to an outlet of the core holder, a gas inlet of the back-pressure valve is connected to the hand-operated pump, and the pressure gauge is arranged between the back-pressure valve and the hand-operated pump;
the back pressure valve with still be equipped with the valve between the hand pump, the valve is located being close to of manometer one side of back pressure valve.
7. The nuclear magnetic resonance displacement experiment device based on the ceramic holder according to claim 1, further comprising a sampling device, wherein the sampling device comprises a three-way valve and a micro-flow control valve, two ports of the three-way valve are connected to an outlet pipeline of the core holder, and the micro-flow control valve is arranged on a third port of the three-way valve.
8. The nuclear magnetic resonance displacement experiment device based on the ceramic holder according to claim 1, wherein valves are arranged between the injection device and the core holder and between the core holder and the pressure control device.
9. A nmr displacement experiment method using the nmr displacement experiment apparatus based on a ceramic holder according to any one of claims 1 to 8, the method comprising the steps of:
1) preparing a solution required by an experiment;
2) placing a core sample in a cavity of the core holder;
3) setting the pressure of the pressure control device as the pressure required by the experiment;
4) starting the nuclear magnetic system to monitor the process of fluid passing through the rock pores in real time;
5) starting the injection device, sequentially opening an inlet and an outlet of the core holder when the injection pressure of the injection device reaches the pressure required by the experiment, injecting the solution into the core holder by using the injection device, and acquiring a nuclear magnetic resonance signal at fixed intervals, wherein the nuclear magnetic resonance signal shows the condition that the fluid passes through the core sample;
6) after the pressure in the device is stable and fluid flows out at a constant speed, the temperature control system is utilized to heat the interior of the rock core holder to the experimental temperature and keep the temperature constant, and nuclear magnetic resonance signals are acquired at intervals of fixed time intervals, wherein the nuclear magnetic resonance signals show the condition that the fluid passes through the rock core sample.
10. The nmr displacement experiment method of claim 9, wherein the nmr displacement experiment device further comprises a sampling device, the sampling device comprises a three-way valve and a micro-flow control valve, two ports of the three-way valve are connected to an outlet line of the core holder, and the micro-flow control valve is arranged at a third port of the three-way valve;
the step 6) further comprises periodically receiving a fluid sample through the micro-flow control valve for post-analysis testing.
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| CN202011011548.8A CN114428095A (en) | 2020-09-23 | 2020-09-23 | Nuclear magnetic resonance displacement experimental device and method based on ceramic clamp holder |
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| CN202011011548.8A CN114428095A (en) | 2020-09-23 | 2020-09-23 | Nuclear magnetic resonance displacement experimental device and method based on ceramic clamp holder |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116603583A (en) * | 2023-07-20 | 2023-08-18 | 中国科学院地质与地球物理研究所 | Electric heating method and nuclear magnetic resonance online displacement system |
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2020
- 2020-09-23 CN CN202011011548.8A patent/CN114428095A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116603583A (en) * | 2023-07-20 | 2023-08-18 | 中国科学院地质与地球物理研究所 | Electric heating method and nuclear magnetic resonance online displacement system |
| CN116603583B (en) * | 2023-07-20 | 2023-09-15 | 中国科学院地质与地球物理研究所 | Electric heating method and nuclear magnetic resonance online displacement system |
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