CN106940289B - Thermal shrinkage sealing type multi-measuring-point oil-gas exploitation simulation device - Google Patents
Thermal shrinkage sealing type multi-measuring-point oil-gas exploitation simulation device Download PDFInfo
- Publication number
- CN106940289B CN106940289B CN201710294006.8A CN201710294006A CN106940289B CN 106940289 B CN106940289 B CN 106940289B CN 201710294006 A CN201710294006 A CN 201710294006A CN 106940289 B CN106940289 B CN 106940289B
- Authority
- CN
- China
- Prior art keywords
- pressure measuring
- pressure
- core
- connector
- face
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000007789 sealing Methods 0.000 title claims abstract description 75
- 238000004088 simulation Methods 0.000 title claims abstract description 40
- 239000011435 rock Substances 0.000 claims abstract description 30
- 239000011248 coating agent Substances 0.000 claims abstract description 4
- 238000000576 coating method Methods 0.000 claims abstract description 4
- 230000000149 penetrating effect Effects 0.000 claims description 29
- 230000006835 compression Effects 0.000 claims description 9
- 238000007906 compression Methods 0.000 claims description 9
- 239000007788 liquid Substances 0.000 claims description 6
- 238000002347 injection Methods 0.000 claims description 5
- 239000007924 injection Substances 0.000 claims description 5
- 239000007789 gas Substances 0.000 description 30
- 238000009530 blood pressure measurement Methods 0.000 description 9
- 238000002474 experimental method Methods 0.000 description 8
- 239000000463 material Substances 0.000 description 8
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 7
- 239000000741 silica gel Substances 0.000 description 7
- 229910002027 silica gel Inorganic materials 0.000 description 7
- 239000003513 alkali Substances 0.000 description 4
- 230000007797 corrosion Effects 0.000 description 4
- 238000005260 corrosion Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 239000002654 heat shrinkable material Substances 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000002585 base Substances 0.000 description 1
- 108010066057 cabin-1 Proteins 0.000 description 1
- 239000002775 capsule Substances 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 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
- 238000010438 heat treatment Methods 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 125000004435 hydrogen atom Chemical class [H]* 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- -1 polyethylene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920000098 polyolefin Polymers 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
Classifications
-
- 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
- G01N15/082—Investigating permeability by forcing a fluid through a sample
- G01N15/0826—Investigating permeability by forcing a fluid through a sample and measuring fluid flow rate, i.e. permeation rate or pressure change
-
- 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
- G01N15/0806—Details, e.g. sample holders, mounting samples for testing
Landscapes
- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Analytical Chemistry (AREA)
- Dispersion Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Fluid Mechanics (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
- Measuring Fluid Pressure (AREA)
Abstract
The invention relates to a heat-shrinkable sealed multi-measuring-point oil gas exploitation simulation device, which comprises a sealable pressure cabin body and a heat-shrinkable sealing unit, wherein the heat-shrinkable sealing unit can be used for sealing and coating a rock core and stop plugs which are arranged at two ends of the rock core in an abutting manner; the pressure cabin body is internally provided with a core clamping device, and the core clamping device can axially compress and fix a core and a stop plug which are hermetically coated by the heat shrinkage sealing unit; the heat-shrinkable sealed multi-measuring-point oil-gas exploitation simulation device further comprises a pressure measuring joint structure, one end of the pressure measuring joint structure is propped against the rock core, and the other end of the pressure measuring joint structure penetrates through the pressure cabin in a sealing mode. The device overcomes the problems that a rubber cylinder in the existing device is easy to damage, easy to age, poor in experimental simulation stress accuracy and the like, a core sealing structure in the device is not easy to damage, long in service life, and the device can accurately simulate the stress condition of the core, and experimental results are more accurate.
Description
Technical Field
The invention relates to the technical field of oil reservoir simulation experiments, in particular to a heat-shrinkage sealing type multi-measuring-point oil-gas exploitation simulation device for exploring the seepage rule of a rock core.
Background
The core holder is an important and indispensable experimental device when the physical simulation of the oil reservoir and the research of the seepage law in the fluid core are carried out in a laboratory. The accuracy and reliability of experimental data can be directly affected by the quality and applicability of the core holder.
The common core holder consists of a cylinder body, a plug, a cylinder body end cover and a base. When the core is used, the core is usually placed into a rubber cylinder, the side wall of the core is completely contacted with the inner wall of the rubber cylinder, and core plugs with the same cross-sectional shape and size as the core are respectively placed at two ends of the core and are wrapped by the rubber cylinder together with the core. And then placing the rubber barrel wrapped with the core plug and the core into the inner cavity of the barrel. The plugs are fixed at the two ends of the rubber cylinder, the cylinder end covers are connected, a closed cavity is formed among the plugs, the cylinder end covers and the rubber cylinder, liquid is pumped into the cavity, confining pressure is formed outside the rubber cylinder, and after the confining pressure is stable, experiments are started.
With the more and more intensive research of people on hydrocarbon reservoirs, the requirements on the experimental precision of the core, especially the low-permeability core and the compact core, are higher and higher, and when the multi-point pressure experiment of the core is carried out, the existing core holder has various defects: firstly, the rubber cylinder is easy to leak; secondly, when a carbon dioxide experiment is carried out, the swelling of the rubber cylinder is easy to cause; thirdly, the rubber cylinder is easy to age, and the service life is short; fourth, the rubber cylinder is large in volume and elasticity, and influence on some experimental results of elasticity sensitivity is great; fifth, the oil reservoir simulation experiment using the rubber cylinder as the core sealing device cannot form axial pressure and cannot accurately simulate the oil reservoir condition.
Therefore, the inventor provides a heat-shrinkable sealed multi-measuring-point oil and gas exploitation simulation device by virtue of experience and practice of related industries for many years so as to overcome the defects of the prior art.
Disclosure of Invention
The invention aims to provide a heat-shrinkage sealing type multi-measuring-point oil-gas exploitation simulation device, which solves the problems that a rubber cylinder in the existing device is easy to damage and age, the experimental simulation stress accuracy is poor, and the like.
The invention aims to realize that a heat-shrinkable sealed multi-measuring-point oil-gas exploitation simulation device comprises a sealable pressure cabin body, wherein a heat-shrinkable sealing unit capable of hermetically coating a rock core and stop plugs with two ends of the rock core being abutted is arranged in the pressure cabin body; the pressure cabin body is internally provided with a core clamping device, and the core clamping device can axially compress and fix the core and the stop plug which are hermetically coated by the heat-shrinkable sealing unit; the heat-shrinkable sealed multi-measuring-point oil-gas exploitation simulation device further comprises a pressure measuring joint structure, one end of the pressure measuring joint structure is propped against the rock core, and the other end of the pressure measuring joint structure penetrates through the pressure cabin in a sealing mode.
In a preferred embodiment of the present invention, one end of the core clamping device can be propped against a stop plug at one end of the core, and the other end of the core clamping device is provided with a pressing rod which can be propped against the stop plug at the other end of the core along the axial direction.
In a preferred embodiment of the present invention, the core holding device includes a casing with an open top, a leg structure is disposed at a bottom of the casing downward, a bottom plate penetrating groove that is penetrating and can support the core and the stop plug is disposed on a bottom plate of the casing, a first side wall of the casing can support the stop plug at one end of the core, the casing includes a second side wall opposite to the first side wall, and the second side wall is provided with the compression rod in a penetrating manner.
In a preferred embodiment of the present invention, a pressure measuring connector fixing rod is disposed at the top of the housing, and a plurality of connector vias for penetrating and fixing the pressure measuring connector structure are disposed on the pressure measuring connector fixing rod at intervals.
In a preferred embodiment of the present invention, the pressing rod is a screw, and the second side wall is provided with a threaded hole capable of being connected with the screw in a threaded manner.
In a preferred embodiment of the present invention, the pressure measuring joint structure includes a plurality of side pressure measuring joints disposed at intervals, one end of the side pressure measuring joints abuts against a side wall of the core, the pressure measuring joint structure further includes a first end pressure measuring joint and a second end pressure measuring joint, one ends of the first end pressure measuring joint and the second end pressure measuring joint abut against two end surfaces of the core respectively, the other ends of the side pressure measuring joints are connected with the pressure measuring instrument, the other end of the first end pressure measuring joint is communicated with a first pressure source, and the other end of the second end pressure measuring joint is communicated with a second pressure source.
In a preferred embodiment of the present invention, a through hole for penetrating the side pressure measuring connector is provided on a side wall of the heat-shrinkable sealing unit, a pressure measuring sheet opposite to the through hole is provided between an inner wall of the heat-shrinkable sealing unit and a side wall of the core in a sealing manner, and one end of the side pressure measuring connector abuts against the pressure measuring sheet.
In a preferred embodiment of the present invention, two of the stop plugs are provided with a via hole, and one ends of the first end face pressure measuring connector and the second end face pressure measuring connector are propped against the end face of the core through the via hole; and a sealing unit capable of sealing and penetrating the first end face pressure measuring joint and the second end face pressure measuring joint is arranged at the inlet of the via hole.
In a preferred embodiment of the present invention, the lateral pressure measuring joint includes a lateral inner pressure measuring joint propped against the side wall of the core and a lateral outer pressure measuring joint penetrating through the pressure cabin in a sealing manner, the lateral inner pressure measuring joint and the lateral outer pressure measuring joint are connected through a pressure measuring pipeline, and the lateral outer pressure measuring joint is connected with the pressure measuring instrument through a pressure measuring pipeline; the first end face pressure measuring connector comprises a first end face inner pressure measuring connector propped against one end face of the rock core and a first pressure connector penetrating through the pressure cabin in a sealing manner, the first end face inner pressure measuring connector is communicated with the first pressure connector through a pipeline, and the first pressure connector is communicated with the first pressure source through a pipeline; the second end face pressure measuring connector comprises a second end face inner pressure measuring connector propped against the other end face of the rock core and a second pressure connector penetrating through the pressure cabin in a sealing mode, the second end face inner pressure measuring connector is communicated with the second pressure connector through a pipeline, and the second pressure connector is communicated with a second pressure source through a pipeline.
In a preferred embodiment of the invention, the pressure cabin comprises a cabin body, wherein sealing end covers are connected to two ends of the cabin body in a sealing manner, and a sealable liquid injection hole is formed in the cabin body.
Therefore, the heat-shrinkable sealed multi-measuring-point oil-gas exploitation simulation device provided by the invention has the following beneficial effects:
(1) According to the heat-shrinkable sealed multi-measuring-point oil gas exploitation simulation device, the heat-shrinkable sealing unit is used for sealing the core and the stop plugs at the two ends of the core, so that the sealing effect is effectively improved, and the heat-shrinkable sealing unit is good in pressure resistance, high temperature resistance, strong alkali resistance and corrosion resistance, not easy to damage and long in service life;
(2) The core clamping device adopted in the heat-shrinkable sealed multi-measuring-point oil gas exploitation simulation device can axially compress the core to form axial pressure of the core, so that the stress condition of the core in an oil reservoir can be more accurately simulated, and the experimental result is more accurate;
(3) In the heat-shrinkable sealed multi-measuring-point oil-gas exploitation simulation device, the compression rod on the core clamping device for axially compressing the core can move along the axial direction, so that the core clamping device can clamp cores with various specifications, and has good universality;
(4) In the heat-shrinkable sealed multi-measuring-point oil-gas exploitation simulation device, the pressure measuring sheet is made of the silica gel material, the pressure measuring sheet made of the silica gel material has good elasticity, the accuracy of measuring the pressure measuring joint structure can be ensured, and the pressure measuring joint structure can be well attached to the side wall of the rock core and the inner wall of the heat-shrinkable sealing unit during heat shrinkage and ring compression, so that the rock core is effectively sealed;
(5) The heat-shrinkage sealing type multi-measuring-point oil-gas exploitation simulation device is simple to operate, can accurately simulate the stress condition of a rock core, and has more accurate experimental results.
Drawings
The following drawings are only for purposes of illustration and explanation of the present invention and are not intended to limit the scope of the invention. Wherein:
fig. 1: the invention relates to a schematic diagram of a heat-shrinkable sealed multi-measuring-point oil gas exploitation simulation device.
Fig. 2: the invention relates to a side view of a heat-shrinkable sealed multi-measuring-point oil-gas exploitation simulation device.
Fig. 3: is a top schematic view of the core holding apparatus of the present invention.
Fig. 4: is a schematic bottom view of the core clamping device of the invention.
In the figure:
100. a heat-shrinkable sealed multi-measuring-point oil-gas exploitation simulation device;
1. a pressure chamber; 10. a cabin body; 11. sealing the end cover;
2. a heat-shrinkable sealing unit; 21. testing the tablet;
3. a core clamping device;
30. a housing;
301. a bottom plate; 3011. a bottom plate penetrating groove; 302. a first sidewall; 303. a second sidewall;
31. a leg structure;
32. a pressing rod;
33. a pressure measuring joint fixing rod; 331. a joint via;
4. a pressure measuring joint structure;
41. a lateral pressure measurement joint;
411. a lateral internal pressure measurement joint; 412. a lateral external pressure measuring joint;
42. a first end face pressure tap;
421. a pressure tap in the first end face; 422. a first pressure joint;
43. a second end face pressure measurement joint;
431. a second end face internal pressure measurement joint; 432. a second pressure joint;
8. a stop plug;
81. a via hole;
9. core.
Detailed Description
For a clearer understanding of technical features, objects, and effects of the present invention, a specific embodiment of the present invention will be described with reference to the accompanying drawings.
As shown in fig. 1 to 4, the invention provides a heat-shrinkable sealed multi-measuring-point oil and gas exploitation simulation device 100, which comprises a sealable pressure cabin body 1, wherein a heat-shrinkable sealing unit 2 capable of sealing and coating a rock core 9 and stop plugs 8 which are arranged at two ends of the rock core 9 in an abutting manner is arranged in the pressure cabin body 1, and the stop plugs 8 are matched with the shape and the specification of the rock core 9 and can be determined according to actual use conditions; the heat-shrinkable sealing unit 2 is made of a heat-shrinkable material, wherein the heat-shrinkable material can be a material with a reduced volume when heated, and can be polyethylene or polyolefin hydrogen, the heat shrinkage ratio is 2:1, and the heat-shrinkable sealing unit has good pressure resistance, high temperature resistance, strong alkali resistance and corrosion resistance; the inside of the pressure cabin body 1 is also provided with a core clamping device 3, and the core clamping device 3 can axially compress and fix a core 9 and a stop plug 8 which are hermetically coated by the heat-shrinkable sealing unit 2; the heat-shrinkable sealed multi-measuring-point oil gas exploitation simulation device 100 further comprises a pressure measuring joint structure 4, one end of the pressure measuring joint structure is propped against the rock core, and the other end of the pressure measuring joint structure is hermetically penetrated through the pressure cabin body 1. According to the heat-shrinkable sealed multi-measuring-point oil gas exploitation simulation device 100, the heat-shrinkable sealing unit is adopted to seal the core 9 and the stop plugs 8 at the two ends of the core, so that the sealing effect is effectively improved, and the heat-shrinkable sealing unit is good in pressure resistance, high temperature resistance, strong alkali resistance and corrosion resistance, not easy to damage and long in service life; the core clamping device adopted in the heat-shrinkable sealed multi-measuring-point oil gas exploitation simulation device 100 can axially compress the core 9 to form axial pressure of the core 9, so that the stress condition of the core in an oil reservoir can be more accurately simulated, and the experimental result is more accurate.
Further, as shown in fig. 1, 3 and 4, one end of the core clamping device 3 can be propped against the stop plug 8 at one end of the core 9, and the other end of the core clamping device 3 is provided with a pressing rod 32 which can be propped against the stop plug 8 at the other end of the core 9 along the axial direction. In this embodiment, the core clamping device 3 includes a casing 30 with an open top, a leg structure 31 is disposed at the bottom of the casing 30 downward, a bottom plate 301 of the casing 30 is provided with a through bottom plate through slot 3011 capable of supporting the core 9 and the stop plug 8, a first side wall 302 of the casing 30 can be propped against the stop plug 8 at one end of the core 9, the casing 30 includes a second side wall 303 disposed opposite to the first side wall 302, a movable pressing rod 32 is disposed on the second side wall 303 in a penetrating manner, and the pressing rod 32 can be propped against the stop plug 8 at the other end of the core 9 along the axial direction. The first side wall 302 of the shell 30 and the pressing rod 32 can respectively prop against the stop plugs 8 at two ends of the core along the axial direction, so that the axial fixation of the core 9 is realized. In this embodiment, the pressing rod 32 is a screw, and a threaded hole to which the screw can be screwed is provided in the second side wall. The compression rod 32 can move along the axial direction, so that the core clamping device 3 can clamp cores 9 with various specifications, and the universality is good.
Further, as shown in fig. 1 and 4, the top of the housing 30 is provided with a pressure measuring joint fixing rod 33, and a plurality of joint through holes 331 for penetrating and fixing the pressure measuring joint structure 4 are provided on the pressure measuring joint fixing rod 33 at intervals.
Further, as shown in fig. 1, the pressure measuring joint structure 4 includes a plurality of side pressure measuring joints 41 disposed at intervals, one end of which abuts against the side wall of the core 9, the pressure measuring joint structure 4 further includes a first end face pressure measuring joint 42 and a second end face pressure measuring joint 43, one ends of the first end face pressure measuring joint 42 and the second end face pressure measuring joint 43 abut against two end faces of the core 9 respectively, the other ends of the plurality of side pressure measuring joints 41 are connected with pressure measuring instruments (in the prior art, not shown in the drawing), the other ends of the first end face pressure measuring joint 42 are communicated with a first pressure source (in the prior art, not shown in the drawing), and the other ends of the second end face pressure measuring joint 43 are communicated with a second pressure source (in the prior art, not shown in the drawing).
Further, as shown in fig. 1 and 2, a through hole for penetrating the side pressure measuring joint 41 is formed in the side wall of the heat shrinkage sealing unit 2, a pressure measuring piece 21 opposite to the through hole is arranged between the inner wall of the heat shrinkage sealing unit 2 and the side wall of the core 9 in a sealing manner, the pressure measuring piece 21 can seal the core 9 at a position corresponding to the through hole, one end of the side pressure measuring joint 41 abuts against the pressure measuring piece 21, and one end of the side pressure measuring joint 41 senses the pressure on the side wall of the core 9 through the pressure measuring piece 21. The side pressure measuring connector 41 passes through the through hole and abuts against the pressure measuring piece 21 on the side wall of the core 9, so that the pressure measurement at the side wall of the core 9 can be realized while the sealing of the core 9 is ensured. In a specific embodiment of the present invention, the pressure measuring piece 21 is made of a silica gel material, and the pressure measuring piece 21 made of the silica gel material has good elasticity, can ensure the measurement accuracy of the pressure measuring joint structure 4, and can be well attached to the side wall of the core 9 and the inner wall of the heat shrinkage sealing unit 2 during heat shrinkage and ring compression, so as to effectively seal the core 9 at the position corresponding to the through hole.
Further, as shown in fig. 1, the two stop plugs 8 are provided with through holes penetrating through the first end face pressure measuring connector 42 and the second end face pressure measuring connector 43 respectively, and one ends of the first end face pressure measuring connector 42 and the second end face pressure measuring connector 43 are propped against the end face of the core 9 through the through holes 81, so that pressure measurement at the end face of the core 9 is achieved. In order to ensure the sealing of the core 9, a sealing unit capable of sealing and penetrating the first end face pressure measuring joint 42 and the second end face pressure measuring joint 43 is arranged at the inlet of the through hole 81, and in a specific embodiment of the present invention, the sealing unit adopts a sheet structure made of a silica gel material.
As shown in fig. 1 and 2, in the present embodiment, the side pressure measuring joint 41, the first end face pressure measuring joint 42 and the second end face pressure measuring joint 43 are all in a sectional arrangement, the side pressure measuring joint 41 includes a side inner pressure measuring joint 411 propped against the side wall of the core 9 and a side outer pressure measuring joint 412 penetrating through the pressure cabin 1 in a sealing manner, the side inner pressure measuring joint 411 and the side outer pressure measuring joint 412 are connected through a pressure measuring pipeline, and the side outer pressure measuring joint 412 is connected with a pressure measuring instrument through a pressure measuring pipeline; the first end face pressure measuring joint 42 comprises a first end face inner pressure measuring joint 421 propped against one end face of the core 9 and a first pressure joint 422 penetrating through the pressure cabin body 1 in a sealing manner, the first end face inner pressure measuring joint 421 and the first pressure joint 422 are communicated through a pipeline, and the first pressure joint 422 is communicated with a first pressure source through a pipeline; the second end face pressure measuring joint 43 comprises a second end face inner pressure measuring joint 431 propped against the other end face of the core 9 and a second pressure joint 432 penetrating through the pressure cabin body 1 in a sealing mode, the second end face inner pressure measuring joint 431 and the second pressure joint 432 are communicated through a pipeline, and the second pressure joint 432 is communicated with a second pressure source through a pipeline. The side inner pressure measuring joint 411 is fixedly arranged in the joint through hole 331 on the pressure measuring joint fixing rod 33 in a penetrating way, and the first end inner pressure measuring joint 421 and the second end inner pressure measuring joint 431 are respectively arranged in the through holes on the two stop plugs 8 in a penetrating way. When the core multipoint pressure measurement experiment is carried out, the first pressure source charges high-pressure test gas into the core 9 through the first pressure connector 422 and the first end face inner pressure measuring connector 421, and a pressure difference is formed between the end face of the core 9 propped by the first end face inner pressure measuring connector 421 and the end face of the core 9 propped by the second end face inner pressure measuring connector 431, so that preparation is made for subsequent real-time monitoring of pressure change.
Further, as shown in fig. 1 and 2, the pressure chamber 1 includes a chamber body 10, and seal caps 11 are sealingly connected to both ends of the chamber body 10, and in this embodiment, the seal caps 11 are fixedly and sealingly connected to both ends of the chamber body 10 by bolts. The capsule body 10 is provided with a sealable liquid injection hole. When the rock core multipoint pressure measurement experiment is carried out according to the specific embodiment of the invention, water is pumped into the cabin body 10 through the liquid injection hole by the pump, the water forms annular pressure on the rock core 9, and the size of the annular pressure can be adjusted according to the experiment requirement.
When the heat-shrinkage sealed multi-measuring-point oil and gas exploitation simulation device 100 is used for core multi-point pressure measurement experiments, firstly, two stop plugs 8 matched with a core 9 to be measured are selected, a pressure measuring connector 421 in a first end face and a pressure measuring connector 431 in a second end face are respectively penetrated into through holes on the two stop plugs 8, the two stop plugs 8 are respectively propped against two end faces of the core 9, a pressure measuring sheet 21 is arranged on the side wall of the core 9, and a heat-shrinkage sealing unit 2 is sealed and coated on the core 9 and the two stop plugs 8 in a heating mode; the core 9 and the two stop plugs 8 which are sealed and coated by the heat-shrinkable sealing unit 2 are placed in the core clamping device 3, the core 9 and the two stop plugs 8 are axially pressed and fixed by the pressing rod 32, and the axial acting force of the pressing rod 32 is determined according to the axial pressure required by experiments; placing the core clamping device 3 in the cabin body 10, connecting each side inner pressure measuring joint 411 and each side outer pressure measuring joint 412 through a pressure measuring pipeline, connecting each side outer pressure measuring joint 412 with a pressure measuring instrument through a pressure measuring pipeline, connecting the first end inner pressure measuring joint 421 and the first pressure joint 422 through a pipeline, connecting the first pressure joint 422 with a first pressure source through a pipeline, connecting the second end inner pressure measuring joint 431 and the second pressure joint 432 through a pipeline, and connecting the second pressure joint 432 with a second pressure source through a pipeline; after the pressure measuring joint structure 4 is connected, the two ends of the cabin body 10 are connected with the sealing end covers 11 in a sealing way.
After the pressure cabin body 1 is sealed, water is pumped into the cabin body 10 through the liquid injection hole by the pump, the water forms annular pressure on the core 9 through the opening at the top of the shell 30 and the bottom plate penetrating groove 3011, after the annular pressure meets the experimental requirement and is stable, the first pressure source fills high-pressure experimental gas (the pressure range of the high-pressure experimental gas is from atmospheric pressure to 70 MPa) into the core 9 through the first pressure connector 422 and the first end surface inner pressure connector 421, a pressure difference is formed between the end surface (set as the head end) of the core 9 abutted against by the first end surface inner pressure connector 421 and the end surface (set as the tail end) of the core 9 abutted against by the second end surface inner pressure connector 431, and the pressure change condition of the core 9 abutted against by the pressure connector 411 in each side part starts to be monitored in real time, so that the law of the pressure change along with time is obtained. The pressure of the high-pressure experimental gas filled by the first pressure source is changed, a new pressure difference is formed between the head end and the tail end, the pressure change condition of the core 9 propped by the pressure measuring connector 411 in each side part under the new pressure difference is continuously monitored, and a new pressure change rule along with time is obtained.
Therefore, the heat-shrinkable sealed multi-measuring-point oil-gas exploitation simulation device provided by the invention has the following beneficial effects:
(1) According to the heat-shrinkable sealed multi-measuring-point oil gas exploitation simulation device, the heat-shrinkable sealing unit is used for sealing the core and the stop plugs at the two ends of the core, so that the sealing effect is effectively improved, and the heat-shrinkable sealing unit is good in pressure resistance, high temperature resistance, strong alkali resistance and corrosion resistance, not easy to damage and long in service life;
(2) The core clamping device adopted in the heat-shrinkable sealed multi-measuring-point oil gas exploitation simulation device can axially compress the core to form axial pressure of the core, so that the stress condition of the core in an oil reservoir can be more accurately simulated, and the experimental result is more accurate;
(3) In the heat-shrinkable sealed multi-measuring-point oil-gas exploitation simulation device, the compression rod on the core clamping device for axially compressing the core can move along the axial direction, so that the core clamping device can clamp cores with various specifications, and has good universality;
(4) In the heat-shrinkable sealed multi-measuring-point oil-gas exploitation simulation device, the pressure measuring sheet is made of the silica gel material, the pressure measuring sheet made of the silica gel material has good elasticity, the accuracy of measuring the pressure measuring joint structure can be ensured, and the pressure measuring joint structure can be well attached to the side wall of the rock core and the inner wall of the heat-shrinkable sealing unit during heat shrinkage and ring compression, so that the rock core is effectively sealed;
(5) The heat-shrinkage sealing type multi-measuring-point oil-gas exploitation simulation device is simple to operate, can accurately simulate the stress condition of a rock core, and has more accurate experimental results.
The foregoing is illustrative of the present invention and is not to be construed as limiting the scope of the invention. Any equivalent changes and modifications can be made by those skilled in the art without departing from the spirit and principles of this invention, and are intended to be within the scope of this invention.
Claims (5)
1. The heat-shrinkable sealed multi-measuring-point oil-gas exploitation simulation device comprises a sealable pressure cabin body, and is characterized in that a heat-shrinkable sealing unit capable of sealing and coating a rock core and stop plugs with two ends of the rock core being abutted against each other is arranged in the pressure cabin body; the pressure cabin body is internally provided with a core clamping device, and the core clamping device can axially compress and fix the core and the stop plug which are hermetically coated by the heat-shrinkable sealing unit; the heat-shrinkable sealed multi-measuring-point oil-gas exploitation simulation device further comprises a pressure measuring joint structure, one end of the pressure measuring joint structure is propped against the rock core, and the other end of the pressure measuring joint structure is sealed and penetrates through the pressure cabin body;
the pressure measuring joint structure comprises a plurality of side pressure measuring joints which are arranged at intervals and one ends of which are propped against the side wall of the rock core, and also comprises a first end face pressure measuring joint and a second end face pressure measuring joint, wherein one ends of the first end face pressure measuring joint and the second end face pressure measuring joint are propped against the two end faces of the rock core respectively, the other ends of the side pressure measuring joints are connected with pressure measuring instruments, the other ends of the first end face pressure measuring joints are communicated with a first pressure source, and the other ends of the second end face pressure measuring joints are communicated with a second pressure source;
a through hole for penetrating the side pressure measuring connector is formed in the side wall of the heat-shrinkage sealing unit, a pressure measuring sheet opposite to the through hole is arranged between the inner wall of the heat-shrinkage sealing unit and the side wall of the core in a sealing manner, and one end of the side pressure measuring connector abuts against the pressure measuring sheet;
one end of the core clamping device can prop against a stop plug at one end of the core, and the other end of the core clamping device is provided with a compression rod which can prop against the stop plug at the other end of the core along the axial direction;
the core clamping device comprises a shell with an opening at the top, a supporting leg structure is downwards arranged at the bottom of the shell, a through bottom plate penetrating groove which can support the core and the stop plug in a propping mode is arranged on a bottom plate of the shell, a first side wall of the shell can prop against the stop plug at one end of the core, the shell comprises a second side wall which is opposite to the first side wall, and the second side wall is provided with the compression rod in a penetrating mode;
the side part pressure measuring connector comprises a side part inner pressure measuring connector propped against the side wall of the rock core and a side part outer pressure measuring connector penetrating through the pressure cabin in a sealing manner, the side part inner pressure measuring connector is connected with the side part outer pressure measuring connector through a pressure measuring pipeline, and the side part outer pressure measuring connector is connected with the pressure measuring instrument through the pressure measuring pipeline; the first end face pressure measuring connector comprises a first end face inner pressure measuring connector propped against one end face of the rock core and a first pressure connector penetrating through the pressure cabin in a sealing manner, the first end face inner pressure measuring connector is communicated with the first pressure connector through a pipeline, and the first pressure connector is communicated with the first pressure source through a pipeline; the second end face pressure measuring connector comprises a second end face inner pressure measuring connector propped against the other end face of the rock core and a second pressure connector penetrating through the pressure cabin in a sealing mode, the second end face inner pressure measuring connector is communicated with the second pressure connector through a pipeline, and the second pressure connector is communicated with a second pressure source through a pipeline.
2. The heat-shrinkable sealed type multi-measuring-point oil-gas exploitation simulation device according to claim 1, wherein a pressure measuring joint fixing rod is arranged at the top of the shell, and a plurality of joint through holes for penetrating and fixing the pressure measuring joint structure are arranged on the pressure measuring joint fixing rod at intervals.
3. The heat-shrinkable sealed type multi-measuring-point oil and gas exploitation simulation device according to claim 1, wherein the pressing rod is a screw rod, and the second side wall is provided with a threaded hole capable of being in threaded connection with the screw rod.
4. The heat-shrinkable sealed multi-measuring-point oil-gas exploitation simulation device according to claim 1, wherein two stop plugs are provided with through holes, and one ends of the first end face pressure measuring connector and the second end face pressure measuring connector are propped against the end face of the rock core through the through holes; and a sealing unit capable of sealing and penetrating the first end face pressure measuring joint and the second end face pressure measuring joint is arranged at the inlet of the via hole.
5. The heat-shrinkable sealed type multi-measuring-point oil-gas exploitation simulation device according to claim 1, wherein the pressure cabin body comprises a cabin body, sealing end covers are connected to two ends of the cabin body in a sealing mode, and a sealable liquid injection hole is formed in the cabin body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710294006.8A CN106940289B (en) | 2017-04-28 | 2017-04-28 | Thermal shrinkage sealing type multi-measuring-point oil-gas exploitation simulation device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710294006.8A CN106940289B (en) | 2017-04-28 | 2017-04-28 | Thermal shrinkage sealing type multi-measuring-point oil-gas exploitation simulation device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106940289A CN106940289A (en) | 2017-07-11 |
| CN106940289B true CN106940289B (en) | 2023-10-24 |
Family
ID=59464107
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710294006.8A Active CN106940289B (en) | 2017-04-28 | 2017-04-28 | Thermal shrinkage sealing type multi-measuring-point oil-gas exploitation simulation device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106940289B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111413483A (en) * | 2019-12-16 | 2020-07-14 | 大庆油田有限责任公司 | Mechanical pressurization type square rock core holder |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5325723A (en) * | 1992-12-04 | 1994-07-05 | Halliburton Company | Core sample test method and apparatus |
| CN201273190Y (en) * | 2008-10-15 | 2009-07-15 | 中国石油天然气股份有限公司 | Triaxial stress multi-pressure-measuring-point core oil reservoir simulation device |
| CN101907586A (en) * | 2010-06-11 | 2010-12-08 | 中国石油天然气股份有限公司 | High-temperature and high-pressure holder for nuclear magnetic resonance test of rock core |
| CN102011581A (en) * | 2010-11-24 | 2011-04-13 | 中国石油大学(北京) | Simulated evaluation device for well-drilling plugging of stress sensitivity stratum |
| CN202176322U (en) * | 2011-08-08 | 2012-03-28 | 中国石油大学(北京) | High temperature high pressure corrosion resisting reservoir simulating device |
| CN103245769A (en) * | 2013-04-17 | 2013-08-14 | 中国石油天然气股份有限公司 | Long rock core simulation water injection test system |
| CN104596905A (en) * | 2014-12-31 | 2015-05-06 | 西南石油大学 | Device and method for measuring permeability of rock in fracturing process |
| CN205049454U (en) * | 2015-09-17 | 2016-02-24 | 西南石油大学 | Rock core holder |
| CN106442264A (en) * | 2016-10-14 | 2017-02-22 | 吉林大学 | Device for testing permeability under high temperature and high pressure |
-
2017
- 2017-04-28 CN CN201710294006.8A patent/CN106940289B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5325723A (en) * | 1992-12-04 | 1994-07-05 | Halliburton Company | Core sample test method and apparatus |
| CN201273190Y (en) * | 2008-10-15 | 2009-07-15 | 中国石油天然气股份有限公司 | Triaxial stress multi-pressure-measuring-point core oil reservoir simulation device |
| CN101907586A (en) * | 2010-06-11 | 2010-12-08 | 中国石油天然气股份有限公司 | High-temperature and high-pressure holder for nuclear magnetic resonance test of rock core |
| CN102011581A (en) * | 2010-11-24 | 2011-04-13 | 中国石油大学(北京) | Simulated evaluation device for well-drilling plugging of stress sensitivity stratum |
| CN202176322U (en) * | 2011-08-08 | 2012-03-28 | 中国石油大学(北京) | High temperature high pressure corrosion resisting reservoir simulating device |
| CN103245769A (en) * | 2013-04-17 | 2013-08-14 | 中国石油天然气股份有限公司 | Long rock core simulation water injection test system |
| CN104596905A (en) * | 2014-12-31 | 2015-05-06 | 西南石油大学 | Device and method for measuring permeability of rock in fracturing process |
| CN205049454U (en) * | 2015-09-17 | 2016-02-24 | 西南石油大学 | Rock core holder |
| CN106442264A (en) * | 2016-10-14 | 2017-02-22 | 吉林大学 | Device for testing permeability under high temperature and high pressure |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106940289A (en) | 2017-07-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101907586B (en) | High-temperature and high-pressure holder for nuclear magnetic resonance test of rock core | |
| CN109236243B (en) | Three-dimensional comprehensive reservoir hydrate simulation analysis system and analysis method | |
| US10928337B2 (en) | High-temperature and high-pressure nuclear magnetic resonance core holder | |
| CN103926180A (en) | Flexible core axial stress loading method in pore fluid displacement tests | |
| CN105987933A (en) | Measurement device for rock resistivity test and special-purpose electrode pad thereof | |
| CN104914229A (en) | Multi-parameter high-temperature high-pressure major diameter rock core holder | |
| CN113138153B (en) | Rock sample holder, rock porosity measurement system and method | |
| CN105181469A (en) | Rock naked triasial compression test apparatus and test method | |
| CN108181165B (en) | Core holder | |
| CN106940289B (en) | Thermal shrinkage sealing type multi-measuring-point oil-gas exploitation simulation device | |
| CN110530772B (en) | Integrative test device of coal sample high pressure meeting an emergency and carbon dioxide displacement coal bed methane | |
| CN102261941B (en) | Method for measuring bomb chamber volume | |
| CN110658125A (en) | Core holder for slurry dynamic pollution experiment | |
| CN111323358A (en) | Full-diameter shale core bedding seam drainage holder | |
| CN204903529U (en) | Major diameter rock core hollow billet pressure curve and constraint water saturation measuring device | |
| CN110207640B (en) | Single-crack micron-sized gap width measuring structure, and mounting method and measuring method thereof | |
| CN106644264A (en) | Calibration connection device for ocean pressure sensor | |
| CN210108909U (en) | Take water-cooled rock core holder | |
| CN211669025U (en) | Rock core gas permeability detection device | |
| CN206671142U (en) | The sealed multi-measuring point oil-gas mining analogue means of pyrocondensation | |
| CN106404307A (en) | Test method and test apparatus for sealing performance of rubber gasket | |
| CN213749361U (en) | Rock core holder and rock sound wave velocity anisotropy measuring device | |
| CN209991963U (en) | Single-crack micron-sized gap width measuring structure | |
| CN206208462U (en) | Water-sealed bearing verifying attachment | |
| CN112213238B (en) | Self-absorption loading device of rock core column with variable height and wettability measuring method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |