Equipment for testing self-repairing capacity of well cementation set cement

Abstract

The invention provides equipment for testing the self-repairing capacity of well cementation set cement. The equipment comprises a testing air source and a set cement container, wherein an air inlet pipeline of the set cement container is connected with the testing air source; a first pressure gage is arranged on the air inlet pipeline; a first flowmeter is arranged on an air outlet pipeline; a first cavity for containing the set cement is formed in the set cement container; the wall body of the first cavity is made of an elastic material; the first cavity is respectively communicated with the air inlet pipeline and the air outlet pipeline; the first cavity is formed in the second cavity; a sealing cavity is formed between the first cavity and the second cavity and is connected with a high-pressure air source which pressurizes the interior of the sealing cavity; or the first cavity is positioned in a sealing box; and the sealing box is connected with a high-pressure air source which pressurizes the interior of the sealing box. According to the equipment for testing the self-repairing capacity of well cementation set cement, a self-repairing effect of well cementation set cement can be evaluated, and the device is easy and convenient to operate, safe, reliable and short in experimental period.

Description

technical field [0001] The invention relates to a test device for cement stone, in particular to a test device for self-repair ability of cement stone. Background technique [0002] In the oilfield cementing process, the mixed oil well cement slurry is pumped into the annular space between the casing and the formation through a high-pressure cementing pump. After the oil and gas well is tested and put into production, it must go through various well testing, testing and production operations, so that the casing and cement sheath will be affected by large changes in temperature, pressure and other factors, which will inevitably affect the sealing performance of the cement sheath. Destruction, that is, micro-gap and micro-cracks are generated at the cemented interface, thereby forming channeling channels for downhole formation fluid (especially natural gas), resulting in failure of interlayer isolation. At present, the basic method to solve the problem of formation fluid chan...

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Problems solved by technology

[0004] In this application, the indoor experimental evaluation device for the self-repairing ability of cement stone in the prior art is also in the research and exploration stage, and there is no perfect and mature

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