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Salt cavern oil storage surrounding rock self-balancing triaxial compression testing apparatus and method

A self-balancing, triaxial compression technology, applied to measuring devices, applying stable tension/pressure to test material strength, instruments, etc., can solve problems such as damage to precision servo control valves, and determination of triaxial compressive strength. Achieve the effect of good integrity, simple operation and good practicability

Active Publication Date: 2016-10-26
INST OF ROCK AND SOIL MECHANICS - CHINESE ACAD OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because crude oil and brine are highly corrosive to the steel pressurized cylinder and triaxial pressure chamber in the prior art, and the solid particles contained in crude oil and brine will cause fatal damage to the precision servo control valve, therefore, In the prior art, there is no specific test method to measure the triaxial compressive strength of the reservoir surrounding rock in the environment of crude oil or brine erosion

Method used

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  • Salt cavern oil storage surrounding rock self-balancing triaxial compression testing apparatus and method
  • Salt cavern oil storage surrounding rock self-balancing triaxial compression testing apparatus and method
  • Salt cavern oil storage surrounding rock self-balancing triaxial compression testing apparatus and method

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Embodiment 1

[0074] See attached Figure 1-8 , The self-balancing triaxial compression test device for the surrounding rock of the salt cavern oil storage provided by Embodiment 1 of the present invention includes a chamber 1 , a pressure rod 16 , a piston 8 , a sample 24 , a first plug 6 , and a second plug 14 . The inner wall of the chamber 1 is provided with a first step 4 protruding inward, through the first step 4, the chamber 1 is divided into an upper chamber N and a lower chamber M, and the sample 24 is placed in the lower chamber M And stretch into the upper chamber N, the pressure rod 16 is set in the upper chamber N and loaded on the top of the sample 24, the piston 8 is annular, and the piston 8 forms a sliding pair through its inner wall and the side wall of the pressure rod 16, The piston 8 constitutes a sliding pair through its outer wall and the inner wall of the upper chamber N, the diameter of the sample 24<the inner diameter of the chamber 1 at the first step 4<the outer...

Embodiment 2

[0092] See attached Figure 9 The method of the self-balancing triaxial compression test device for the surrounding rock of the salt cavern oil storage depot provided in the second embodiment of the present invention is realized based on the self-balancing triaxial compression test device for the surrounding rock of the salt cavern oil storage depot provided in the first embodiment of the present invention. The method of the self-balancing triaxial compression test device for the surrounding rock of the oil depot includes the following steps:

[0093] Step S1: placing the sample 24 in the lower chamber M so that a part of the sample 24 protrudes into the upper chamber N;

[0094] Step S2: filling the oil cavity with oil or brine;

[0095] Step S3: use the first plug 6 to seal the oil inlet joint 5, and use the second plug 14 to seal the oil outlet passage 9;

[0096] Step S4: Embedding the self-balancing triaxial compression test device for the surrounding rock of the salt c...

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Abstract

The invention discloses a salt cavern oil storage surrounding rock self-balancing triaxial compression testing apparatus and method and belongs to the technical field of salt cavern oil storages. The apparatus comprises a cavity, a press rod, a piston, a sample, a first plug and a second plug; the inner wall of the cavity is provided with an inwardly raised first step, the cavity is divided by the first step into an upper cavity and a lower cavity , the sample is disposed in the lower cavity and extended straightly to the upper cavity, the press rod is dispose in the upper cavity and is loaded to the top of the sample, the piston is circular, the diameter of the sample is less than an inner diameter of the cavity at the first step and less than an outer diameter of the piston, the bottom of the sidewall of the lower cavity is provided with an oil incoming connector, the piston is axially provided with an oil outgoing passage, and an oil cavity may communicate with the outside through the oil incoming connector and / or the oil outgoing passage; the first plug is used for sealing the oil incoming connector, and the second plug is used for sealing the oil outgoing passage. The method is implemented based on the apparatus. The apparatus and method are provided in a triaxial pressure chamber and enable a triaxial compression test to be simulated in high-pressure crude oil or brine eroded environment.

Description

technical field [0001] The invention relates to the technical field of underground oil storage in salt caverns, in particular to a self-balancing triaxial compression test device and a test method for surrounding rocks of salt cavern oil storage depots. Background technique [0002] Salt rock is internationally recognized as an ideal place for underground oil storage, and the construction of underground salt cavern oil storage is of great significance to the national strategic oil reserve. Since there is no precedent for the construction of salt cavern oil storage in China, it is necessary to conduct a feasibility study of salt cavern oil storage based on the experience of building salt cavern oil storage abroad and in combination with the specific geological conditions of salt rock in China. Among them, the influence of storage medium on the stability of non-salt interlayer or cap rock is the key to demonstrating the tightness of salt cavern oil storage. Therefore, it is ve...

Claims

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Application Information

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IPC IPC(8): G01N3/12
CPCG01N3/12G01N2203/0019G01N2203/0048
Inventor 施锡林张楠杨春和马洪岭马旭强李金龙葛鑫博尹洪武
Owner INST OF ROCK AND SOIL MECHANICS - CHINESE ACAD OF SCI
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