Visual system for testing cementation quality of specially-shaped well cementation interface II and intensity of specially-shaped body

Abstract

The invention relates to the technical field of detection of the cementation quality of a well cementation interface II, in particular to a visual system for testing the cementation quality of a specially-shaped well cementation interface II and the intensity of a specially-shaped body. A simulated formation cavity and a well cementation cement / cement stone cavity are communicated to form an experimental cavity, and a perpendicular communicated surface is an interface II; circular sealing retainer rings are respectively arranged at the top and the bottom of the experimental cavity; a cement stone lifting die is arranged at the lower part of the well cementation cement / cement stone cavity; a thermocouple is arranged in the simulated formation cavity; multiple reaction gas injection pipes are arranged in the simulated formation cavity; visual windows are respectively formed in the sides of the simulated formation cavity and the well cementation cement / cement stone cavity; a sealing coveris arranged at the top of the simulated formation cavity; the top of the well cementation cement / cement stone cavity is sealed and is provided with a gas-liquid inlet / outlet. The device can be used for evaluating the cementation quality of the interface II and testing soil in a soft soil stratum and the quality of a cemented surface of cement in a well cementation process of a hydrate-containingstratum.

Description

technical field [0001] The invention relates to the technical field of cementing two-interface cementation quality detection technology, and in particular to a visual cementing quality and special-shaped body strength test system for special-shaped cementing two-interface. Background technique [0002] The extraction of oil and natural gas needs to go through a series of complex processes, including drilling, cementing, completion, perforation, water injection, oil production, etc. Among them, cementing plays an important role in providing protection and support for the casing and effective interlayer isolation of adjacent formations. The quality of the cementing directly determines the life of the production well, and has an important impact on the smooth progress of the subsequent links and the recovery rate. It is a key project for the long-term stable production of the oilfield. Therefore, it is very necessary to evaluate the cementing quality. The key to the cementing ...

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Problems solved by technology

[0005] In view of the above technical problems, the present invention provides a visual cementing quality of special-shaped cementing two-interface and special-shaped body strength testing system, aiming to solve the problem of special-shaped cementing two-interface in the evaluation method of cementing two-interface cementing quality in weak mechanical strength formation Form simulation is difficult, the degree of simulation is low, and the cement quality of the second interface is difficult to evaluate. The visualization function is added, which is beneficial to the observation of the cement sheath and the cementation shape of the second interface, and through the replacement of multiple components, the reservoir well can be evaluated separately Effects of wall interface conditions and conical intrusions on the cementation quality of the two interfaces

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