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Method for testing seal performance of salt wells

A test method and sealing technology, applied in the field of old and abandoned salt well reuse, to achieve the effect of accurate test results, reasonable test methods and scientific sampling points

Inactive Publication Date: 2019-03-22
HUBEI SHUANGHUAN SCIENCE AND TECHNOLOGY STOCK CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is currently no suitable and effective method to test the tightness and evaluate the stability of the old cavity formed by the salt well

Method used

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  • Method for testing seal performance of salt wells
  • Method for testing seal performance of salt wells
  • Method for testing seal performance of salt wells

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Embodiment Construction

[0017] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0018] The invention provides a method for testing the tightness of a salt well, such as figure 1 shown, including the following steps:

[0019] Step 1, the well group collusion test, the test well group and the adjacent well group are stopped and emptied until no brine returns, and the test well group is injected with water. If the adjacent well group has brine return, the test well group It is a channeling or layer channeling well group; if the adjacent well group has no brine return, the test well group is an independent well group.

[0020] Step 2, well group leakage test, continue to inject ...

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Abstract

The invention belongs to the technical field of old and abandoned salt well recycling, and discloses a method for testing the seal performance of salt wells. The method includes steps of 1 well groupcollaboration tests, 2 well group leakage tests and 3 well group pressure-tight tests. The method has the advantages that the collaboration tests, the leakage tests and the pressure-tight tests are successively carried out, and accordingly the method is reasonable; large quantities of test data are sampled, sampling points are scientific, and test and evaluation bases are effective; attention is paid to heat balance of salt caverns in test procedures, rock salt corrosion, plastic deformation of the salt wells and the like are prevented in the test procedures, and accordingly test results are accurate.

Description

technical field [0001] The invention relates to the technical field of reuse of old and abandoned salt wells, in particular to a method for testing the tightness of salt wells. Background technique [0002] The underground brine (naturally formed or generated after water injection in salt mines) is extracted by drilling wells, and the salt produced is called well salt, and the vertical shaft that produces well salt is called salt well or brine mining well. As one of the main sources of salt raw materials, well salt has been widely developed and applied. However, the ability of a salt well to produce salt is limited, and long-term brine mining will leave a large number of abandoned salt wells. Abandoned salt wells will not only cause waste of land resources, but also be restricted by well completion and closure techniques. Harmful gases such as underground brine, natural gas, sulfur dioxide, and hydrogen sulfide are likely to flow up along abandoned wells, enter shallow aqui...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M3/26
CPCG01M3/26
Inventor 阮坚蒋向阳彭美凡李治高
Owner HUBEI SHUANGHUAN SCIENCE AND TECHNOLOGY STOCK CO LTD
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