CN110823779B - Rock core holder and combination formula rock core centre gripping model - Google Patents
Rock core holder and combination formula rock core centre gripping model Download PDFInfo
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- CN110823779B CN110823779B CN201911132856.3A CN201911132856A CN110823779B CN 110823779 B CN110823779 B CN 110823779B CN 201911132856 A CN201911132856 A CN 201911132856A CN 110823779 B CN110823779 B CN 110823779B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume, or surface-area of porous materials
- G01N15/08—Investigating permeability, pore-volume, or surface area of porous materials
- 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
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N11/00—Investigating flow properties of materials, e.g. viscosity, plasticity; Analysing materials by determining flow properties
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Abstract
The invention discloses a rock core holder and a combined rock core holding model, wherein the rock core holder comprises a left plug, a rock core placing cavity and a right plug which are sequentially connected, a fluid channel communicated with the rock core placing cavity is arranged in the axis center of the left plug and the right plug, a pressure measuring sleeve is sleeved on the outer surface of the left plug, a pressure measuring hole is formed in the left end of the pressure measuring sleeve, a boss II is arranged at the left end of the right plug, rubber sleeves are sleeved on the outer surfaces of the boss I, the boss II and the rock core placing cavity, the outer surface of the middle of each rubber sleeve is inwards recessed along the radial direction, the inner surfaces of two ends of each rubber sleeve are outwards recessed along the radial direction, inner covers are arranged at two ends of each rubber sleeve, a shell is sleeved on the outer surfaces of the rubber sleeves and the inner covers, each shell is provided with a confining pressure hole connected with a confining pressure measuring rod, a left end cover penetrating through the pressure measuring sleeve is arranged at the left end of each shell, and a right end cover penetrating through the right plug is arranged at the right end of each shell. The invention can measure the on-way pressure of the fluid passing through the rock core and the viscosity of the produced liquid, and research the condition of effective viscosity of the liquid phase in the process of porous medium migration.
Description
Technical Field
The invention relates to the technical field of core holders, in particular to a core holder and a combined core holder model.
Background
Rock is the main object of geological exploration and is an aggregate of one or more minerals with a certain structural structure. The structure of the rock is generally recorded with geological change processes like calligraphy and painting, and the analysis of the rock structure can confirm geological components, rock character characteristics and geological change process characteristics.
The core holder is a special device for holding and sealing a core to finish the permeability and porosity test of the core or various core displacement experiments, and has the main functions of putting a core sample to be tested or tested into the core holder and ensuring that the side surface of the core sample can be completely sealed when a test fluid passes through the front end and the rear end of the core sample.
Disclosure of Invention
Aiming at the problems, the invention aims to provide a core holder and a combined core holding model, wherein the core holder can completely seal a core and can be combined for use, the on-way pressure of fluid passing through the core and the viscosity of produced liquid are measured, and the condition of effective viscosity of the liquid phase in the porous medium transfer process is researched.
The technical scheme of the invention is as follows:
on one hand, the core holder comprises a left plug, a core placing cavity and a right plug which are sequentially connected, wherein a fluid channel communicated with the core placing cavity is arranged in the axis center of the left plug and the right plug, a boss I is arranged at the right end of the left plug, a pressure measuring sleeve is sleeved on the outer surface of the left plug adjacent to the boss I, a pressure measuring hole is arranged at the left end of the pressure measuring sleeve, a boss II is arranged at the left end of the right plug, the outer diameter of the boss II is the same as that of the boss I and as that of the core placing cavity, rubber sleeves are sleeved on the outer surfaces of the boss I, the boss II and the core placing cavity, the outer surface of the middle part of each rubber sleeve is inwards recessed along the radial direction, the inner surfaces at two ends of each rubber sleeve are outwards recessed along the radial direction, inner covers are arranged at two ends of each rubber sleeve, one end of each inner cover extends into the recess at the end part of each rubber sleeve, the rubber sleeve and the outer surface cover of inner cup are equipped with the casing, the casing with form the confined pressure between the rubber sleeve and fill the chamber, the casing be equipped with fill the communicating confined pressure hole in chamber, the confined pressure hole links to each other with the confined pressure pole, the left end of casing is equipped with and passes the sheathed tube left end lid of pressure measurement, the right-hand member of casing is equipped with and passes the right-hand member end cover of right side end cap.
Preferably, a cross-shaped annular diversion trench is formed in the end face, adjacent to the rock core placing cavity, of the left plug.
Preferably, a cross-shaped annular diversion trench is formed in the end face, adjacent to the rock core placing cavity, of the right plug.
Preferably, a clamping rod is arranged on the outer surface of the right end of the right plug, and a clamping groove matched with the clamping rod is formed in the right end cover.
Preferably, the outer diameter of the pressure measuring sleeve is smaller than or equal to the outer diameter of the first boss.
Preferably, a sealing ring is arranged between the pressure measuring sleeve and the first boss.
Preferably, the joints of the inner cover and the two ends of the rubber sleeve are provided with detachable rubber rings.
Preferably, the part of the inner cover extending into the recess at the end part of the rubber sleeve is an arc-shaped surface.
Preferably, the outer surface of the middle part of the shell protrudes outwards along the radial direction, the outer diameter of the protruding part is the same as that of the left end cover and the right end cover, and the right end face of the left end cover and the left end face of the right end cover abut against the end face of the protruding part of the shell.
On the other hand, the combined core holding model comprises at least two core holders, wherein the two core holders are connected with each other through a horizontal control valve, and a liquid extraction port is formed in the bottom of the horizontal control valve.
Compared with the prior art, the invention has the following advantages:
the core holder has good sealing performance, and the combined core holding model can measure the on-way pressure of fluid passing through the core and the viscosity of produced liquid and research the condition of effective viscosity of the liquid phase in the process of transporting porous media.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the description of the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic diagram of a core holder according to the present disclosure;
FIG. 2 is a schematic cross-sectional view of a core holder according to the present disclosure;
FIG. 3 is a schematic illustration of an explosive structure of the core holder of the present invention;
FIG. 4 is a schematic structural view of a left plug of the core holder of the present invention;
FIG. 5 is a schematic structural view of a right plug of the core holder of the present invention;
FIG. 6 is a schematic view of the rubber sheath of the core holder according to the present disclosure;
FIG. 7 is a schematic diagram of the construction of the inner cover of the core holder of the present invention;
fig. 8 is a schematic structural diagram of the combined core holding model of the invention.
Reference numbers in the figures:
1-left plug, 2-core placing cavity, 3-right plug, 4-fluid channel, 5-boss I, 6-pressure measuring sleeve, 7-pressure measuring hole, 8-boss II, 9-rubber sleeve, 10-inner cover, 11-shell, 12-filling cavity, 13-confining pressure hole, 14-left end cover, 15-right end cover, 16-cross annular diversion trench, 17-clamping rod, 18-clamping groove, 19-sealing ring, 20-horizontal control valve, 21-liquid extraction port and 22-confining pressure rod.
Detailed Description
The invention is further illustrated with reference to the following figures and examples.
It should be noted that, in the present application, the embodiments and the technical features of the embodiments may be combined with each other without conflict.
It is noted that, unless otherwise indicated, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
In the present invention, the terms "first", "second", and the like are used for distinguishing similar objects, but not for describing a particular order or sequence order, unless otherwise specified. It is to be understood that the terminology so used; the terms "upper", "lower", "left", "right", and the like are used generally with respect to the orientation shown in the drawings, or with respect to the component itself in a vertical, or gravitational orientation; likewise, "inner", "outer", and the like refer to the inner and outer relative to the contours of the components themselves for ease of understanding and description. The above directional terms are not intended to limit the present invention.
As shown in fig. 1-7, on one hand, a core holder is provided, which comprises a left plug 1, a core placing cavity 2 and a right plug 3 connected in sequence, wherein the axial centers of the left plug 1 and the right plug 3 are provided with a fluid channel 4 communicated with the core placing cavity 2, the right end of the left plug 1 is provided with a boss one 5, the outer surface of the left plug 1 adjacent to the boss one 5 is sleeved with a pressure measuring sleeve 6, the left end of the pressure measuring sleeve 6 is provided with a pressure measuring hole 7, the left end of the right plug 3 is provided with a boss two 8, the outer diameter of the boss two 8 is the same as the outer diameter of the boss one 5 and the outer diameter of the core placing cavity 2, the outer surfaces of the boss one 5, the boss two 8 and the core placing cavity 2 are sleeved with a rubber sleeve 9, the outer surface of the middle part of the rubber sleeve 9 is recessed inwards along the radial direction, and the inner surfaces of the two ends of the rubber sleeve are recessed outwards along the radial direction, the pressure measuring sleeve is characterized in that inner covers 10 are arranged at two ends of the rubber sleeve, one end of each inner cover 10 extends into a recess at the end part of the rubber sleeve 9, a shell 11 is sleeved on the outer surfaces of the rubber sleeve 9 and the inner covers 10, a confining pressure filling cavity 12 is formed between each shell 11 and the rubber sleeve 9, each shell 11 is provided with a confining pressure hole 13 communicated with the corresponding filling cavity 12, each confining pressure hole 13 is connected with a confining pressure rod 22, a left end cover 14 penetrating through the pressure measuring sleeve 6 is arranged at the left end of each shell 11, and a right end cover 15 penetrating through the right plug 3 is arranged at the right end of each shell 11.
In a specific embodiment, the end face of the left plug 1 adjacent to the core placing cavity 2 and the end face of the right plug 3 adjacent to the core placing cavity 2 are both provided with a cross-shaped annular diversion trench 16, so that uniform injection of liquid can be ensured, an end face effect is prevented from occurring, and the accuracy of an experiment is improved.
In a specific embodiment, the left plug 1 is a plug at an extraction end, the right plug 3 is a plug at an injection end, a clamping rod 17 is arranged on the outer surface of the right end of the right plug 3, the right end cover 15 is provided with a clamping groove 18 matched with the clamping rod 17, and the right plug 3 and the right end cover 15 can be locked through the matching of the clamping rod 17 and the clamping groove 18. Optionally, the left and right end covers are connected with the shell through threads.
In a specific embodiment, the outer diameter of the pressure measuring sleeve 6 is smaller than or equal to the outer diameter of the boss one 5, and a sealing ring 19 is arranged between the pressure measuring sleeve 6 and the boss one 5, so that the sealing performance can be enhanced.
In a specific embodiment, the connection between the inner cover 10 and the two ends of the rubber sleeve 9 is provided with a detachable rubber ring (not shown in the figure), and the rubber ring with a suitable thickness is added, so that the core sealing device is suitable for cores with different lengths and has enhanced sealing performance.
In a specific embodiment, the portion of the inner cap 10 extending into the recess at the end of the rubber sleeve 9 is an arc surface, which can prevent the end surface with an angle from damaging the rubber sleeve, improve the service life of the rubber sleeve, and can extend into the rubber sleeve more conveniently.
In a specific embodiment, the outer surface of the middle portion of the housing 11 protrudes outward in the radial direction, the outer diameter of the protruding portion is the same as the outer diameter of the left end cover and the outer diameter of the right end cover, and the right end surface of the left end cover and the left end surface of the right end cover abut against the end surface of the protruding portion of the housing.
As shown in fig. 8, on the other hand, a combined core holding model is further provided, which includes at least two core holders as described in any one of the above, and two adjacent core holders are connected through a horizontal control valve 20, and a liquid extraction port 21 is provided at the bottom of the horizontal control valve 20.
In a specific embodiment, the pressure measuring hole 7 is connected with a pressure sensor, the pressure sensor is used for measuring the pressure of the section, and the pressure transmission process among the sections is realized; the produced liquid of each section can be obtained through the liquid production port 21, the parameters of the solution of the produced liquid are measured, and the condition of the effective viscosity of the liquid phase in the process of the migration of the porous medium is researched. In the experimental process, the confining pressure rod can be connected with the confining pressure hole, the confining pressure rod is used for pressurizing and releasing pressure, and the pressure of each section can be kept consistent.
Although the present invention has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. A rock core holder is characterized by comprising a left plug, a rock core placing cavity and a right plug which are sequentially connected, wherein a fluid channel communicated with the rock core placing cavity is arranged in the axis center of the left plug and the right plug, a boss I is arranged at the right end of the left plug, a pressure measuring sleeve is sleeved on the outer surface of the left plug adjacent to the boss I, a pressure measuring hole is arranged at the left end of the pressure measuring sleeve, a boss II is arranged at the left end of the right plug, the outer diameter of the boss II is the same as that of the boss I and that of the rock core placing cavity, rubber sleeves are sleeved on the outer surfaces of the boss I, the boss II and the rock core placing cavity, the outer surface of the middle part of each rubber sleeve is inwards recessed along the radial direction, the inner surfaces at two ends of each rubber sleeve are recessed outwards along the radial direction, inner covers are arranged at two ends of each rubber sleeve, one end of each inner cover extends into the recess at the end part of each rubber sleeve, the rubber sleeve and the outer surface cover of inner cup are equipped with the casing, the casing with form the confined pressure between the rubber sleeve and fill the chamber, the casing be equipped with fill the communicating confined pressure hole in chamber, the confined pressure hole links to each other with the confined pressure pole, the left end of casing is equipped with and passes the sheathed tube left end lid of pressure measurement, the right-hand member of casing is equipped with and passes the right-hand member end cover of right side end cap.
2. The core holder as recited in claim 1, wherein a cross-shaped annular diversion trench is formed in an end surface of the left plug adjacent to the core placing cavity.
3. The core holder as recited in claim 1, wherein a cross-shaped annular diversion trench is formed in an end surface of the right plug adjacent to the core placing cavity.
4. The core holder as claimed in claim 1, wherein a clamping rod is arranged on the outer surface of the right end of the right plug, and a clamping groove matched with the clamping rod is arranged on the right end cover.
5. The core holder as recited in claim 1, wherein an outer diameter of the pressure measuring sleeve is less than or equal to an outer diameter of the first boss.
6. The core holder as recited in claim 1, wherein a seal ring is disposed between the pressure measuring sleeve and the first boss.
7. The core holder as recited in claim 1, wherein a detachable rubber ring is provided at the connection of the inner cover and the two ends of the rubber sleeve.
8. The core holder as recited in claim 1, wherein the portion of the inner cover that extends into the recess in the end of the rubber cover is configured as an arcuate surface.
9. The core holder as in any one of claims 1-8, wherein the outer surface of the middle portion of the housing is radially outwardly convex, the outer diameter of the convex portion is the same as the outer diameter of the left and right end caps, and the right end face of the left end cap and the left end face of the right end cap abut against the end face of the convex portion of the housing.
10. A combined core holding model is characterized by comprising at least two core holders according to any one of claims 1 to 9, wherein two adjacent core holders are connected through a horizontal control valve, and the bottom of the horizontal control valve is provided with a liquid extraction port.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911132856.3A CN110823779B (en) | 2019-11-19 | 2019-11-19 | Rock core holder and combination formula rock core centre gripping model |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911132856.3A CN110823779B (en) | 2019-11-19 | 2019-11-19 | Rock core holder and combination formula rock core centre gripping model |
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| CN110823779A CN110823779A (en) | 2020-02-21 |
| CN110823779B true CN110823779B (en) | 2022-09-16 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112763391B (en) * | 2020-12-28 | 2021-12-31 | 中国科学院武汉岩土力学研究所 | Variable-diameter core holder |
| CN115306370B (en) * | 2022-08-10 | 2023-11-24 | 重庆科技学院 | Experimental device and method for online monitoring of residual resistance coefficient of polymer |
| CN116046526B (en) * | 2022-12-20 | 2023-12-01 | 南通市中京机械有限公司 | Ultrahigh-temperature high-pressure core holder |
Family Cites Families (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4573342A (en) * | 1984-09-14 | 1986-03-04 | Marathon Oil Company | Apparatus and method for the automatic porosity and permeability testing of multiple core samples |
| CN201803962U (en) * | 2010-08-05 | 2011-04-20 | 中国石油天然气股份有限公司 | Heterogeneous model computed tomography (CT) scan simulation device |
| KR101245333B1 (en) * | 2012-09-11 | 2013-03-19 | 한국지질자원연구원 | Uncertainty reduction technique in pressure pulse-decay measurement |
| CN103234888B (en) * | 2013-04-17 | 2014-12-24 | 中国石油天然气股份有限公司 | Long rock core holder |
| CN203688415U (en) * | 2014-01-03 | 2014-07-02 | 青岛石大石仪科技有限责任公司 | Gradient core holding unit with pressure guide ring |
| CN103940720B (en) * | 2014-04-18 | 2016-03-23 | 西南石油大学 | A kind of UHV (ultra-high voltage) adding pressure type seal rock heart clamp holder step by step |
| CN104749084A (en) * | 2015-04-14 | 2015-07-01 | 海安县石油科研仪器有限公司 | Pressure-resistant and anti-corrosive core holding unit |
| CN205027686U (en) * | 2015-07-06 | 2016-02-10 | 中国石油大学(北京) | Rock core holder |
| CN105004762B (en) * | 2015-07-06 | 2019-02-26 | 中国石油大学(北京) | A kind of core holding unit |
| CN105239973B (en) * | 2015-10-28 | 2024-03-01 | 中国石油化工股份有限公司 | Condensate gas reservoir blocking removal physical simulation experiment device and experiment method thereof |
| CN106198343B (en) * | 2016-06-29 | 2018-11-02 | 东北石油大学 | A kind of confining pressure control device for rock core displacement test |
| CN206132573U (en) * | 2016-10-31 | 2017-04-26 | 大庆亿莱检验检测技术服务有限公司 | Rock core holder |
| CN106771090B (en) * | 2016-12-26 | 2019-11-12 | 浙江海洋大学 | Along the measuring method and measurement device of journey emulsification of crude oil ability during a kind of template surface activating agent displacement of reservoir oil |
| CN107063963B (en) * | 2016-12-28 | 2019-12-24 | 浙江海洋大学 | Device and method for testing micro-crack expansion and seepage characteristics of tight reservoir |
| CN206410979U (en) * | 2017-01-25 | 2017-08-15 | 重庆地质矿产研究院 | Core holder for simulating hydraulic fracturing and permeability test |
| CN107255613A (en) * | 2017-07-07 | 2017-10-17 | 西南石油大学 | A kind of dynamic capillary force experimental evaluation system of reservoir rockses |
| CN107246998A (en) * | 2017-07-19 | 2017-10-13 | 中国石油大学(北京) | A kind of supercritical carbon dioxide rock core pressure break clamper under pore pressure saturation |
| CN108037006A (en) * | 2017-11-30 | 2018-05-15 | 成都岩心科技有限公司 | A kind of axial space adjusts core holding unit and application method |
| CN207779860U (en) * | 2017-11-30 | 2018-08-28 | 成都岩心科技有限公司 | A kind of novel rock core clamping device |
| CN110320341A (en) * | 2018-03-30 | 2019-10-11 | 中国石油化工股份有限公司 | Fluid phase state test device and experimental method in porous media |
| CN110018105B (en) * | 2019-04-29 | 2020-04-03 | 中国石油大学(北京) | Matrix-fracture system gas flow simulation device and method |
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