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Salt cavern model test method for simulating multi-interbedded salt rock geological conditions

A technology for model testing and geological conditions, which is applied to earth-moving drilling, wellbore/well components, etc., and can solve problems such as failure to reflect the formation of salt rock, failure to realize the process of cavity formation with interlayers, and high cost of core drilling.

Inactive Publication Date: 2012-07-25
CHONGQING UNIV
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Problems solved by technology

[0004] The existing test methods all have the following shortcomings: 1. The cost of core drilling is high and the size effect is serious, which cannot reflect the cavity formation of salt rock well; 2. The cavity formation process with interlayers cannot be realized; 3. The geological conditions cannot be simulated

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  • Salt cavern model test method for simulating multi-interbedded salt rock geological conditions
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  • Salt cavern model test method for simulating multi-interbedded salt rock geological conditions

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Embodiment Construction

[0022] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

[0023] A cavity-building model test method for simulating the geological conditions of multi-interlayer salt rocks. In the test method, a cavity-building model test device is adopted. The structure of the cavity-building model test device is as follows: figure 1 As shown, the test method includes the following steps:

[0024] 1) Analysis of natural interlayered salt rocks: drilling interlayered salt rocks with a diameter of less than 10cm on site, performing layered analysis on the interlayered salt rocks drilled on site, and obtaining the physical characteristics, dissolution properties and interlayer distribution of interlayered salt rocks features.

[0025] 2) Making a heatable salt rock mold: first make a drum 1 with an inner diameter of 32-34 cm (in this embodiment, the drum 1 is an iron drum with a thickness of 1-1.5 cm, and th...

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Abstract

The invention discloses a salt cavern model test method for simulating multi-interbedded salt rock geological conditions, comprising the following steps of: analyzing natural interbedded salt rock; manufacturing a salt rock die capable of heating; manufacturing an interbedded salt rock test piece; drilling downwards from the top end of the interbedded salt rock test piece; placing a pressing plate used for simulating a covering layer on the multi-interbedded salt rock on the top surface of the interbedded salt rock test piece; arranging a salt cavern intermediate casing; calculating the cavern wall thickness of the interbedded salt rock test piece at any salt cavern stage through an ultrasonic transducer which detects and measures the time of a wave propagating the wall surface of the interbedded salt rock test piece to obtain the influence of each salt cavern process parameter on expansion of a laminated salt rock cavern body shape. With the adoption of the experiment method, similar model tests of the geological environment and the salt layer occurrence state are guaranteed, the process of analyzing the multi-interbedded salt rock salt cavern can be better observed, the salt cavern model test method for simulating the multi-interbedded salt rock geological conditions provides more realistic theoretical support and technological guide to avoid salt cavern failure.

Description

technical field [0001] The invention relates to a rock-salt cavity-making test method, in particular to a cavity-building model test method for simulating geological conditions of multi-interlayer salt rocks. Background technique [0002] Compared with other storage methods, rock salt underground oil and gas storage is safe and economical. However, accidents (such as oil and gas leakage, dissolution cavity failure, surface subsidence, etc.) still occur in overseas rock salt underground storage. At present, almost all underground rock salt storages in foreign countries are built in huge salt domes, while the rock salt that can be built in my country is layered rock salt, which has the characteristics of thin thickness, many interlayers, low grade, and large buried depth (Jintan salt rock layer in Jiangsu Province The burial depth is about 1000m), in contrast, the construction of underground rock salt storage in my country is more difficult and the operation risk is higher. At...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B49/00
Inventor 姜德义陈结尹德强任松李林范金阳易亮
Owner CHONGQING UNIV
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