CN220289335U - Experimental device for simulate clay granule is to core injury - Google Patents
Experimental device for simulate clay granule is to core injury Download PDFInfo
- Publication number
- CN220289335U CN220289335U CN202321990688.3U CN202321990688U CN220289335U CN 220289335 U CN220289335 U CN 220289335U CN 202321990688 U CN202321990688 U CN 202321990688U CN 220289335 U CN220289335 U CN 220289335U
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- annular
- core
- pressure
- clay particles
- damage
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- 239000004927 clay Substances 0.000 title claims abstract description 35
- 230000006378 damage Effects 0.000 title claims abstract description 23
- 208000027418 Wounds and injury Diseases 0.000 title description 2
- 239000008187 granular material Substances 0.000 title description 2
- 208000014674 injury Diseases 0.000 title description 2
- 239000002245 particle Substances 0.000 claims abstract description 38
- 239000011435 rock Substances 0.000 claims abstract description 22
- 238000007789 sealing Methods 0.000 claims abstract description 10
- 239000012530 fluid Substances 0.000 claims description 16
- 239000007788 liquid Substances 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 4
- 238000005259 measurement Methods 0.000 claims description 4
- 238000002474 experimental method Methods 0.000 abstract description 5
- 238000004088 simulation Methods 0.000 abstract description 5
- 238000012360 testing method Methods 0.000 abstract description 2
- 238000006073 displacement reaction Methods 0.000 description 5
- 239000007789 gas Substances 0.000 description 4
- 230000035699 permeability Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 229910000967 As alloy Inorganic materials 0.000 description 1
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000013507 mapping Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Landscapes
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The utility model discloses an experimental device for simulating damage of clay particles to a rock core, which belongs to the technical field of rock core testing, and comprises a vertically arranged shell, wherein an annular rock core is arranged in the shell, the upper end and the lower end of the annular rock core are respectively connected with the shell in a sealing way through annular sealing gaskets, so that a first annular cavity is formed between the outer wall of the annular rock core and the inner wall of the shell. According to the utility model, clay particles can not stand and delaminate during experiments, so that the clay particles can enter the annular rock core in a uniform state to damage the rock core, the simulation situation is more similar to the actual situation of a stratum, and the accuracy of experimental results can be improved.
Description
Technical Field
The utility model relates to the technical field of core testing, in particular to an experimental device for simulating damage of clay particles to a core.
Background
In the development process of the oil and gas reservoir, clay particles in drilling fluid easily enter and obstruct fluid circulation due to small pore throat size and poor connectivity of the hypotonic reservoir, namely reservoir damage is caused.
The conventional experimental device for simulating reservoir damage is a core displacement device, the damage degree is determined by exploring the change of core permeability before and after clay particles are injected, for single-phase fluid, the fluid can uniformly enter a core, however, for viscosity particles, the fluid flow rate is low during displacement, the density of the particles and the fluid flowing with the particles is different, the problem of standing and layering of the particles often occurs, the particles are often deposited in a pipeline, part of small-size clay particles enter the core, the larger size is more difficult to enter the core, the actual damage is further caused by the small-size clay particles entering the core, and the damage is not caused by whole clay particles, so that the damage of the real clay particles cannot be simulated, and the simulation result is low in accuracy.
Disclosure of Invention
In view of the above technical problems, the utility model aims to provide an experimental device for simulating damage of clay particles to a core, which can circulate the clay particles through the inside of an annular core, so that the fluid flow rate can be adjusted according to the needs to avoid standing and layering of the clay particles.
The utility model adopts the following technical scheme:
an experimental set-up for simulating damage of clay particles to a core, comprising;
a vertically arranged pressure-resistant housing;
an annular core located in and disposed axially along the housing; the upper end and the lower end of the annular rock core are respectively connected with the shell in a sealing way through annular sealing gaskets; a first annular cavity is formed between the outer wall of the annular rock core and the inner wall of the shell, and the first annular cavity is provided with a discharge port;
the first pressure gauge is used for measuring the pressure of the hollow part of the annular rock core;
a second pressure gauge for measuring the pressure in the first annular cavity;
a circulation system for circulating a fluid to a hollow portion of the annular core;
a measurement system for measuring the amount of lost fluid from an annular core.
As a specific implementation mode of the utility model, the circulating system comprises a liquid storage tank, a circulating pump and a hollow part of the annular rock core which are connected end to end in sequence, and an outlet of the circulating pump is communicated with the bottom of the hollow part of the annular rock core.
As a specific embodiment of the utility model, the circulation system is further provided with a first gas charging line for controlling the pressure of the circulation system.
As a specific embodiment of the utility model, a pressure strain gauge is arranged between the annular sealing gasket and the shell and is used for measuring the axial pressure born by the annular rock core.
As a specific embodiment of the present utility model, the measuring system is a measuring cylinder for receiving the material discharged from the discharge port.
The utility model has the beneficial effects that:
in order to prevent clay particles in a core displacement laboratory from standing and layering, the utility model designs a novel displacement structure, adopts a ring-shaped core, utilizes clay particle fluid to circulate through the hollow part of the core, and improves the flow rate of the clay particles through a circulating pump so as to prevent the clay particles from standing and layering, and the simulation situation is more similar to the actual situation of a stratum, so that the accuracy of an experimental result can be improved.
Drawings
FIG. 1 is a schematic diagram of an experimental setup for simulating damage to a core by clay particles according to example 1 of the present utility model;
in the figure, a housing 100; an annular core 200; a form seal 300; a first pressure gauge 400; a second pressure gauge 500; a graduated cylinder 700; a pressure strain gage 800;
a top cover 110; a bottom cover 120; a liquid storage tank 610; a circulation pump 620; a first gas plenum line 630;
a discharge port 131; back pressure valve 132.
Detailed Description
The present utility model will be further described with reference to the accompanying drawings and detailed description, wherein it is to be understood that, on the premise of no conflict, the following embodiments or technical features may be arbitrarily combined to form new embodiments.
Example 1
Referring to fig. 1, fig. 1 is a schematic diagram of an experimental apparatus for simulating damage of clay particles to a core according to the present embodiment. The experimental device for simulating the damage of clay particles to the rock core comprises a shell 100, an annular rock core 200, a shape sealing gasket 300, a first pressure gauge 400 and a second pressure gauge 500.
The casing 100 is made of high-strength material (such as alloy steel) so as to meet the pressure-bearing capacity required in experiments, the casing 100 is vertically arranged, and a detachable top cover 110 (bolted connection) is arranged at the top of the casing 100 so as to facilitate taking and placing objects such as the annular rock core 200 into the casing 100.
The annular core 200 is axially disposed in the housing 100 along the housing 100; the upper end and the lower end of the annular core 200 are respectively connected with the top cover 110 and the bottom cover 120 of the shell 100 in a sealing way through the annular sealing gasket 300, so that the interior of the shell 100 is divided into two parts, a part between the outer wall of the annular core 200 and the inner wall of the shell 100 is a first annular cavity 130, and a discharge port 131 is arranged at the bottom of the first annular cavity 130; the discharge port 131 is provided with a back pressure valve 132 for controlling the pressure in the first annular cavity 130, and at the same time, the first pressure gauge 400 is used for measuring the pressure in the hollow part of the annular core 200, and the second pressure gauge 500 is used for measuring the pressure in the first annular cavity 130, so that the pressure difference between the inside and the outside of the annular core 200 during the experiment can be obtained. The circulation system is used to circulate fluid to the hollow portion of the annular core 200 and the measurement system is used to meter the volume of lost fluid from the annular core. In addition, a pressure strain gauge 800 is arranged between the annular gasket 300 and the housing 100, and is used for measuring the axial pressure born by the annular core 200, and the magnitude of the axial pressure can be changed by replacing the annular gasket 300 with a different thickness.
Specifically, the circulation system includes a liquid storage tank 610, a circulation pump 620 and a hollow portion of the annular core 200, which are sequentially connected end to end, and an outlet of the circulation pump 620 is communicated with a bottom of the hollow portion of the annular core 200, and fluid at a top of the hollow portion of the annular core 200 overflows into the liquid storage tank 610, so as to ensure that the hollow portion of the annular core 200 is in a completely immersed state. In addition, a first gas pressurizing line 630 is connected to the liquid storage tank 610 for supplying high-pressure nitrogen gas to the circulation system, thereby controlling the pressure of the circulation system. The measuring system is a measuring cylinder 700 for receiving material discharged from the discharge opening.
The experiment is mainly used for simulating the damage of clay particles to the rock core, namely, the change of the permeability of the annular rock core before and after the clay particles enter the annular rock core is measured. The axial pressure of the annular core 200 can be determined through the pressure strain gauge during experiments; the displacement differential pressure is calculated by the first pressure gauge 400 and the second pressure gauge 500, the volume of fluid is measured by the measuring cylinder 700, the flow area of the annular core can also be obtained by mapping, and the manner in which the core permeability is specifically calculated belongs to the prior art, and is not described in detail here. When the clay is simulated to enter the annular core, a clay particle solution is configured in the liquid storage tank, then the circulating pump is started, the clay particle solution is uniformly distributed in the hollow part of the annular core and penetrates through the annular core, the viscosity particles block the pore throat part of the annular core to damage the core, the permeability of the core is reduced, the clay particles cannot be settled at the hollow part of the annular core in the whole simulation process, the clay particles can uniformly enter the core, the field actual situation is more fitted, and the accuracy of the simulation result can be improved.
In the description of the present utility model, it should be noted that the azimuth or positional relationship indicated by the terms "upper", "lower", etc. are based on the azimuth or positional relationship shown in the drawings, and are merely for convenience of describing the present utility model and simplifying the description, and are not indicative or implying that the apparatus or element in question must have a specific azimuth, be constructed and operated in a specific azimuth, and thus should not be construed as limiting the present utility model.
It will be apparent to those skilled in the art from this disclosure that various other changes and modifications can be made which are within the scope of the utility model as defined in the appended claims.
Claims (5)
1. An experimental apparatus for simulating damage to a core from clay particles, comprising:
a vertically arranged pressure-resistant housing;
an annular core located in and disposed axially along the housing; the upper end and the lower end of the annular rock core are respectively connected with the shell in a sealing way through annular sealing gaskets; a first annular cavity is formed between the outer wall of the annular rock core and the inner wall of the shell, and the first annular cavity is provided with a discharge port;
the first pressure gauge is used for measuring the pressure of the hollow part of the annular rock core;
a second pressure gauge for measuring the pressure in the first annular cavity;
a circulation system for circulating a fluid to a hollow portion of the annular core;
a measurement system for measuring the amount of lost fluid from the annular core.
2. The experimental device for simulating damage to a core by clay particles according to claim 1, wherein the circulation system comprises a liquid storage tank, a circulation pump and a hollow part of the annular core, which are connected end to end in sequence, and an outlet of the circulation pump is communicated with the bottom of the hollow part of the annular core.
3. An experimental device for simulating the damage of clay particles to a core according to claim 1, wherein the circulation system is further connected to a first gas pressurization line for controlling the pressure of the circulation system.
4. The experimental set-up for simulating the damage to a core by clay particles according to claim 1, wherein a pressure strain gauge is disposed between the annular seal and the housing.
5. An experimental device for simulating the damage to a core by clay particles according to claim 1, wherein the measurement system is a graduated cylinder for receiving material discharged from the discharge port.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321990688.3U CN220289335U (en) | 2023-07-27 | 2023-07-27 | Experimental device for simulate clay granule is to core injury |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321990688.3U CN220289335U (en) | 2023-07-27 | 2023-07-27 | Experimental device for simulate clay granule is to core injury |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220289335U true CN220289335U (en) | 2024-01-02 |
Family
ID=89327776
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321990688.3U Active CN220289335U (en) | 2023-07-27 | 2023-07-27 | Experimental device for simulate clay granule is to core injury |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220289335U (en) |
-
2023
- 2023-07-27 CN CN202321990688.3U patent/CN220289335U/en active Active
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