CN106324009B - Rock core displacement test equipment and experimental method - Google Patents
Rock core displacement test equipment and experimental method Download PDFInfo
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- CN106324009B CN106324009B CN201510392019.XA CN201510392019A CN106324009B CN 106324009 B CN106324009 B CN 106324009B CN 201510392019 A CN201510392019 A CN 201510392019A CN 106324009 B CN106324009 B CN 106324009B
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- 239000011435 rock Substances 0.000 title claims abstract description 90
- 238000006073 displacement reaction Methods 0.000 title claims abstract description 53
- 238000012360 testing method Methods 0.000 title claims abstract description 39
- 238000002474 experimental method Methods 0.000 title claims abstract description 20
- 238000010438 heat treatment Methods 0.000 claims abstract description 30
- 238000005481 NMR spectroscopy Methods 0.000 claims abstract description 21
- 230000015572 biosynthetic process Effects 0.000 claims description 4
- 239000000523 sample Substances 0.000 abstract description 6
- 239000004576 sand Substances 0.000 abstract description 5
- 239000003921 oil Substances 0.000 description 22
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 20
- 229910002092 carbon dioxide Inorganic materials 0.000 description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 238000011160 research Methods 0.000 description 5
- 238000001514 detection method Methods 0.000 description 4
- 238000004088 simulation Methods 0.000 description 4
- 229920001971 elastomer Polymers 0.000 description 3
- 230000005311 nuclear magnetism Effects 0.000 description 3
- 229920006395 saturated elastomer Polymers 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000003384 imaging method Methods 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 238000004321 preservation Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000006004 Quartz sand Substances 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
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- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses a kind of rock core displacement test equipment and experimental method.The rock core displacement test equipment includes：Core clamping device, it includes columnar cavity, and the cavity is used to place rock core, and the both ends of the cavity are respectively equipped with ring pressure medium input port and ring pressure medium delivery outlet, and ring pressure space is formd between the inner wall of the cavity and the rock core；Ring presses heating unit, it is connected to the ring by pipeline and presses medium input port and ring to press medium delivery outlet, and road is pushed back to form ring；And nuclear magnetic resonance device, it is operatively connected with the core clamping device, and the nuclear magnetic resonance device includes magnet, probe, nuclear electron equipment and operating console.According to the present invention, realize and carry out tight sand high temperature, high pressure displacement test on nuclear magnetic resonance device, and the experimental facilities can bear high temperature and epipodium pressure, meet requirement of experiment.
Description
Technical field
It is more particularly to a kind of to press heating unit with ring the present invention relates to a kind of experimental facilities of oilfield prospecting developing
The experimental method of rock core displacement test equipment and rock core displacement.
Background technology
The displacement test of tight sandstone reservoir be in order to simulation stratum condition dynamic carry out rock core water drive oil, the CO2 displacement of reservoir oils,
CO2 handles up, chemical flooding research work, using nuclear magnetic resonance technique in displacement test research dynamic observation to rock core internal holes
Gap structure oil displacement efficiency and Remaining Oil Distribution.
Fluid relative permeability measure is one of most important fundamental analysis project in oil field development laboratory in rock core, it is surveyed
The accuracy of test result directly affects the development effectiveness in oil field.A variety of rock core displacement test equipment are proposed in the prior art, its
The main analysis and detection device including core clamping device and porous media.
Chinese patent application publication number CN101458218A discloses a kind of carbon dioxide oil-displacing nmr imaging detection
Device, it mainly includes injected system, simulation core device, NMR imaging device, temperature, pressure TT＆C system and outlet
Metering system.According to the description of the document, it can be seen that its existing main problem：1. the rock core of simulation core device is filling
Quartz sand, rather than natural core.In addition simulation core device is simulated for that can only be heated around rock core, cannot add ring pressure
Coring device is the sandpack column of heatproof, and is unable to simulated formation tight sandstone reservoir reservoir pressure.2. the back-up sand mould in experiment
Type injects pressure compared with tight sand rock core, and pressure is relatively low.3. whole detection device does not have online vacuumized part.Generally
The detection device cannot meet simulated formation compact oil reservoir pressure experiment requirement.
The information for being disclosed in the background section is merely intended to understanding of the increase to the general background of the present invention, without answering
It has been the prior art well known to persons skilled in the art when being considered as recognizing or implying the information structure in any form.
The content of the invention
It is an object of the present invention to provide a kind of rock core displacement test equipment, so as to overcome experiment of the prior art
The shortcomings that ring can not being added to press rock core in equipment.
Another object of the present invention is to provide the experimental facilities and experimental method of a kind of rock core displacement, it can significantly be carried
Pressure and temperature in high rock core displacement test, so as to fulfill rock core displacement test equipment simulating stratum compact oil reservoir temperature, pressure
Power, to replace experimental study using nuclear magnetic resonance technique come online tight sandstone reservoir body of carrying out in real time.
To achieve the above object, one aspect of the present invention provides a kind of rock core displacement test equipment, for simulating ground
The temperature and pressure of layer compact oil reservoir, the rock core displacement test equipment include：Core clamping device, it includes columnar chamber
Body, the cavity is used to place rock core, and the both ends of the cavity are respectively equipped with ring pressure medium input port and ring pressure medium output
Mouthful, ring pressure space is formd between the inner wall of the cavity and the rock core；Ring presses heating unit, it is connected to institute by pipeline
Ring pressure medium input port and ring pressure medium delivery outlet are stated, road is pushed back to form ring, ring pressure heating unit includes：First ring pressure is situated between
Matter container, it is used to store ring pressure medium；Ring press pump, it is used to pump ring pressure medium；And heating container, itself and the ring pressure
Pump is connected and for being heated to ring pressure medium；And nuclear magnetic resonance device, it is grasped with the core clamping device
Operatively connect, the nuclear magnetic resonance device includes magnet, probe, nuclear electron equipment and operating console.
Preferably, in above-mentioned technical proposal, the both ends of the core clamping device are equipped with rock core input port and equipped with rock core
Delivery outlet.
Preferably, in above-mentioned technical proposal, vacuum extractor is provided with the rock core input port.
Preferably, in above-mentioned technical proposal, ring pressure heating unit further includes back-pressure valve and backpressure pump, the back-pressure valve and
Backpressure pump is located at the ring and pushes back on road and positioned at the downstream of the rock core delivery outlet, ring pressure medium is transmitted back to described
First ring presses media Containers.
Preferably, in above-mentioned technical proposal, the ring pushes back road and is equipped with temperature controller, to control the heating container
Temperature.
Preferably, in above-mentioned technical proposal, the ring, which pushes back, is additionally provided with temperature sensor on road, to measure the cylindrical shape
Cavity temperature.
Preferably, in above-mentioned technical proposal, the ring pushes back road and is equipped with pressure gauge and back pressure meter, and the pressure gauge is used for
Indicate the ring pressure value that the ring press pump is provided, the back pressure meter is used to refer to the back pressure value that the backpressure pump is provided, described
Ring pressure value is more than the back pressure value.
Another aspect provides a kind of experimental method of rock core displacement, it uses foregoing rock core and drives
Carried out for experimental facilities, it is characterised in that the experimental method includes：Rock core is placed on to the circle of the core clamping device
In the cavity of tubular；By ring pressure medium the heating container is transported to by ring press pump, with to the ring pressure medium carry out pressurization and
Heating；Ring pressure medium through being overpressurized and heating is transported in the cavity, to carry out adding ring pressure to the rock core；Start institute
Vacuum extractor is stated, will be vacuumized in the cavity；Start the nuclear magnetic resonance device to carry out displacement test.
Preferably, ring pressure medium is pressurized to 45MPa, and temperature is heated to 100 DEG C.
Compared with prior art, the present invention has the advantages that：
1. the rock core displacement test equipment of the present invention has ring pressure heating unit, realize and carry out on nuclear magnetic resonance device
Tight sand high temperature, high pressure displacement test.
2. the experimental facilities can bear 45MPa, the ring pressure of 100 DEG C of temperature, meets requirement of experiment.
3. on experimental facilities, tight sandstone reservoir temperature, pressure is simulated, has carried out different permeability rock cores, different displacements
Water drive oil under pressure, the CO2 displacement of reservoir oils, CO2 are handled up displacement test research work.The indices performance symbol of the experimental facilities of the present invention
Requirement of experiment is closed, displacement test research work smoothly completes.Experimental provision is reliable, durable.
4. the modularization connection for simply, conveniently, realizing different piece is combined in each part in the displacement test equipment.
Brief description of the drawings
Fig. 1 is the schematic diagram of rock core displacement test equipment according to the present invention.
Fig. 2 is the flow chart of core displacement experiment method according to the present invention.
Embodiment
Below in conjunction with the accompanying drawings, the embodiment of the present invention is described in detail, it is to be understood that the guarantor of the present invention
Protect scope and from the limitation of embodiment.
Explicitly indicated that unless otherwise other, otherwise in entire disclosure and claims, term " comprising " or its change
Change such as "comprising" or " including " etc. and will be understood to comprise stated element or part, and do not exclude other members
Part or other parts.
Fig. 1 shows showing for the rock core displacement test equipment of the invention based on invention of embodiment according to the present invention
It is intended to.As shown in Figure 1, rock core displacement test equipment according to the preferred embodiment of the present invention mainly include core clamping device,
Ring presses heating unit and nuclear magnetic resonance device three parts.
Core clamping device includes columnar cavity 5, and inside is used to place rock core 6.The cavity 5 is applied to for carrying
The ring pressure and temperature of rock core 6.Since rock core 6 is put into after cavity between the upper lower wall of cavity 5 there are gap, it is empty to constitute ring pressure
Between so that ring pressure medium can flow through the periphery of rock core 6 to apply ring pressure.The left end of cavity 5 is equipped with ring pressure medium input port 9,
Right end is equipped with ring pressure medium delivery outlet 8, and ring presses medium to press medium input port 9 to enter the inside of cavity 5 by ring and is applied to rock
On the outer wall of the heart 6, ring pressure test is carried out.In the present embodiment, the outside of rock core 6 is enclosed with rubber case, ring pressure medium only with
The outer wrapping rubber case contact of rock core 6, does not contact directly with rock core.In addition, the both ends of the core clamping device are equipped with rock core
Input port 7 and equipped with rock core delivery outlet 10, placement and removal for rock core.
In the present invention, the ring pressure heating unit is connected to the ring by pipeline and presses medium input port 9 and ring pressure Jie
Matter delivery outlet 8, road is pushed back to form ring.According to a preferred embodiment, the ring pressure heating unit includes the first ring pressure and is situated between
Matter container 18, ring press pump 17, heating container 13, switch 15, temperature sensor 11 and temperature controller 12.Ring press pump 17 is by first
Ring pressure medium in ring pressure media Containers 18 is transferred to heating container 13 by the first pipeline 16 and is heated, ring after the completion of heating
Pressure medium presses medium inlet 9 to enter in cavity 5 by the ring of cavity 5, so as to apply the ring pressure and temperature of some strength to rock core 6
Degree.Wherein, switch 15 is the switch for the output terminal for heating container 13, and temperature controller 12 is used for the temperature for controlling heating container 13
Degree, temperature sensor 11 is used for the temperature for measuring columnar cavity 5, and temperature controller 12 also controls the temperature of rock core 6.
Preferably, the ring pressure heating unit further includes back-pressure valve 20 and backpressure pump 21, the two is arranged at ring and pushes back road
Go up and be located at the downstream of ring pressure medium delivery outlet 8.Backpressure pump 21 presses the ring in media Containers 22 to press medium to give back to by the second ring
Pressure valve 20 is pressurizeed.The ring pressure medium flowed out from cavity 5 passes through back-pressure valve 20 and backpressure pump 21, and is returned to by the second pipeline 23
First ring pressure media Containers 18, so as to form the medium circulation of pressure-maintaining and heat-preservation.
In a preferred embodiment of the invention, ring pressure heating unit is additionally provided with pressure gauge 14 and back pressure meter 19.Pressure gauge
14 size for indicating the ring pressure value that ring press pump 17 is pumped.Back pressure meter 19 is used for the size for indicating back pressure value.Its middle ring pressure
Pump 17 is added on the pressure of the ring pressure slightly above back-pressure valve 20 of rock core 6,
The nuclear magnetic resonance device is mainly made of magnet 1, probe 2, electronic equipment 3 and operating console 4.Work as rock core
6 are put into after the completion of nuclear-magnetism core clamping device equipment, and core clamping device is put into probe 2, core clamping device
Rock core input port 10 and/or delivery outlet 11 are connected to vacuum extractor, and rock core is by adding ring pressure temperature to vacuumize saturated oils stabilization
After start displacement test, open nuclear-magnetism electronic equipment 3, operating console 4 at this time, you can online to carry out nuclear-magnetism testing rock core dynamic
Displacement test.
The step of experimental method of rock core displacement according to the preferred embodiment of the present invention, is retouched with reference to Fig. 2
State.
First, selection needs the tight sand rock core tested.In the present embodiment, rock core length it is 300 millimeters maximum,
25 millimeters of diameter.
Secondly, in step S101, rock core 6 is put into the columnar cavity 5 of core clamping device, and by rock core
Clamping device is put into the probe 2 of nuclear magnetic resonance equipment.
Then, in step s 102, medium is pressed to be transported to heating container 13 by ring press pump 17 on ring so that ring presses medium
It is heated to certain pressure and certain temperature.
Then, in step s 103, the ring pressure medium through being overpressurized and heating is transported in cavity 5, with to the rock
The heart carries out plus ring pressure.Only contacted with certain pressure and the ring of temperature pressure medium with the outer wrapping rubber case of rock core 6, not with rock core
6 directly contact.In order to the ring of pressurized, heated pressure medium is kept certain to rock core 6 ring pressure and temperature, it is necessary to ring pressure is situated between
Matter carries out pressure-maintaining and heat-preservation circulation.This pressurized, heated ring pressure medium by ring press medium delivery outlet 8 be transferred to back-pressure valve 20.
The pressure of back-pressure valve 20 is supplied by backpressure pump 21, its value is slightly less than ring pressure value numerical value, it is achieved thereby that pressurized, heated medium pressurize
Circulation is kept the temperature, while temperature sensor 11 detects temperature of the ring pressure medium in core clamping device in real time.
Next, in step S104, start vacuum extractor, will be vacuumized in cavity 5.In the present embodiment, by rock
The rock core delivery outlet 10 of heart clamping device left end is closed, and is opened the valve that the rock core input port 7 of right end is connected with vacuum plant, is opened
Dynamic vacuum pump starts to rock core vacuumizing.Saturated oils is completed after vacuumizing and establishes irreducible water process.
Finally, in step S105, start the nuclear magnetic resonance device to carry out displacement test, start displacement pump and start water
The displacement of reservoir oil or CO2 oil displacement experiments.Rock core ring pressure is consistently higher than water or CO2 oil displacement pressures.
The original state of displacement test, start the original saturation oil condition of nuclear magnetic resonance device testing rock core, including image and
T2 is composed.In any time of water drive oil or CO2 oil displacement processes, all nuclear magnetic resonance device can be applied to obtain image and T2 spectrums.Displacement
After the completion of experiment, obtain rock core remaining oil distribution image using nuclear magnetic resonance device and T2 is composed.
The rock core displacement test equipment designed based on the present invention, it is combined true due to possessing ring pressure heating unit
Empty device and nuclear magnetic resonance device, so as to fulfill simulated formation tight sandstone reservoir temperature and pressure, vacuumize saturated rock online
Heart sample, online water drive oil, the CO2 displacement of reservoir oils, CO2 are handled up and further carry out chemical flooding research work.
It is foregoing to the present invention specific exemplary embodiment description be in order to illustrate and illustration purpose.These descriptions
It is not wishing to limit the invention to disclosed precise forms, and it will be apparent that according to the above instruction, can be much changed
And change.The purpose of selecting and describing the exemplary embodiment is that explain that the certain principles of the present invention and its reality should
With so that those skilled in the art can realize and utilize the present invention a variety of exemplaries and
Various chooses and changes.The scope of the present invention is intended to be limited by claims and its equivalents.
Claims (6)
1. a kind of rock core displacement test equipment, the temperature and pressure for simulated formation compact oil reservoir, it is characterised in that the rock core
Displacement test equipment includes：
Core clamping device, it includes columnar cavity, and the cavity is used to place rock core, and the both ends difference of the cavity
Medium input port and ring pressure medium delivery outlet are pressed equipped with ring, it is empty that ring pressure is formd between the inner wall of the cavity and the rock core
Between；The both ends of the core clamping device are equipped with rock core input port and equipped with rock core delivery outlet, the rock core input port and/or institutes
State rock core equipped at outlet port and be provided with vacuum extractor；
Ring presses heating unit, it is connected to the ring by pipeline and presses medium input port and ring to press medium delivery outlet, to form ring
Road is pushed back, ring pressure heating unit includes：
First ring presses media Containers, it is used to store ring pressure medium；
Ring press pump, it is used to pump ring pressure medium；And
Container is heated, it is connected with the ring press pump and is used to heat ring pressure medium；And
Nuclear magnetic resonance device, it is operatively connected with the core clamping device, and the nuclear magnetic resonance device includes magnet, visits
Head, nuclear electron equipment and operating console,
Wherein, the ring pressure heating unit further includes back-pressure valve, backpressure pump and the second ring pressure media Containers, the back-pressure valve and back pressure
Pump is located at the ring and pushes back on road and press medium by second ring positioned at the downstream of the rock core delivery outlet, the backpressure pump
Ring pressure medium in container pressurizes to the back-pressure valve, and the ring pressure medium flowed out from the cavity passes through back-pressure valve and described time
Press pump returns to the first ring pressure media Containers.
2. rock core displacement test equipment according to claim 1, it is characterised in that the ring pushes back road and is equipped with temperature control
Device processed, to control the temperature of the heating container.
3. rock core displacement test equipment according to claim 2, it is characterised in that the ring, which pushes back, is additionally provided with temperature on road
Sensor, to measure the temperature of the columnar cavity.
4. rock core displacement test equipment according to claim 1, it is characterised in that the ring pushes back road and is equipped with pressure gauge
And back pressure meter, the pressure gauge are used to refer to the ring pressure value that the ring press pump is provided, the back pressure meter is used to refer to described return
The back pressure value that press pump is provided, the ring pressure value are more than the back pressure value.
5. a kind of experimental method of rock core displacement, it uses rock core displacement test equipment as claimed in claim 1 to carry out,
It is characterized in that, the experimental method includes：
Rock core is placed in the columnar cavity of the core clamping device,
Ring pressure medium is transported to the heating container by ring press pump, ring pressure medium is pressurizeed and heated；
Ring pressure medium through being overpressurized and heating is transported in the cavity, to carry out adding ring pressure to the rock core；
Start the vacuum extractor, will be vacuumized in the cavity；
Start the nuclear magnetic resonance device to carry out displacement test.
6. the experimental method of rock core displacement according to claim 5, its middle ring pressure medium is pressurized to 45MPa, temperature quilt
It is heated to 100 DEG C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510392019.XA CN106324009B (en) | 2015-07-06 | 2015-07-06 | Rock core displacement test equipment and experimental method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510392019.XA CN106324009B (en) | 2015-07-06 | 2015-07-06 | Rock core displacement test equipment and experimental method |
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| CN106324009A CN106324009A (en) | 2017-01-11 |
| CN106324009B true CN106324009B (en) | 2018-05-11 |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107132240A (en) * | 2017-06-07 | 2017-09-05 | 中国石油天然气股份有限公司 | High-temperature high-pressure fluid filling experimental device for CT |
| CN108152317A (en) * | 2017-12-22 | 2018-06-12 | 浙江海洋大学 | A kind of device and application method that high temp profile control agent plugging effect is driven using nuclear magnetic resonance technique evaluation steam |
| CN114062217A (en) * | 2020-08-07 | 2022-02-18 | 中国石油化工股份有限公司 | Saturated rock core under-pressure imbibition experimental device and method |
| CN114428095A (en) * | 2020-09-23 | 2022-05-03 | 中国石油化工股份有限公司 | Experimental device and method of nuclear magnetic resonance displacement based on ceramic gripper |
| CN113218985B (en) * | 2021-05-10 | 2024-03-22 | 贵州大学 | Nuclear magnetic resonance triaxial experiment high-pressure-to-high-temperature device and operation method thereof |
| CN113406134A (en) * | 2021-06-03 | 2021-09-17 | 中国石油化工股份有限公司 | Testing method and testing device for water-drive pore structure change of loose rock core |
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| US6528995B1 (en) * | 2001-09-10 | 2003-03-04 | Schlumberger Technology Corporation | Methods and apparatus for measuring flow velocity in a wellbore using NMR and applications using same |
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