Healing and leakage blocking performance evaluation method of self-healing gel leakage blocking material

Abstract

The invention provides a healing and leakage blocking performance evaluation method of a self-healing gel leakage blocking material. The healing performance and the leakage blocking performance of theself-healing gel leakage blocking material are evaluated by testing the pressure bearing strength and the tensile strength of the self-healing gel leakage blocking material before and after healing.Then, the healing rate is accurately obtained through calculation; and finally, the healing and leakage blocking performance of the self-healing gel leakage blocking material are comprehensively evaluated through a self-healing performance evaluation index. The evaluation method is simple to operate and convenient to calculate, the test evaluation can be performed in a laboratory, an operator doesnot need to perform a large amount of complex work, the method has the advantages of reliable principle, accurate data, reality, effectiveness and wide applicability, the healing and the leakage blocking conditions of the self-healing gel leakage blocking material can be truly reflected, the evaluation of the leakage blocking and healing performance of the self-healing gel leakage blocking material can be achieved, and theoretical support is provided for subsequent research and development of the self-healing gel leakage blocking material.

Description

technical field [0001] The invention relates to a method for evaluating the healing plugging performance of a self-healing gel plugging material, which belongs to the technical field of oil and gas drilling. Background technique [0002] In oil and gas exploration and development, the fundamental goal of leak plugging is to seal leaky layers and ensure the smooth development of subsequent oil and gas development. Gel leak plugging technology is one of the commonly used and effective technologies for plugging leaky layers. The current gel plugging technology has achieved good results in field applications, but there are certain limitations, such as the size of the existing and lost channels. Difficult to match, not suitable for sealing large-scale cracks, and the accumulation area is easy to be diluted, washed away and other problems; in application, it is easy to waste a lot of materials. Commonly used gel materials have two techniques when used on site: one is slug pluggin...

AI Technical Summary

Problems solved by technology

However, there are few studies on self-healing gel plugging materials in drilling fluid plugging. At the same time, there are no exact experiments, evaluation methods and standards to evaluate their self-healing plugging performance, especially there is no exact method to compare self-healing gel plugging. The mechanical properties of the self-healing gel plugging material before and after healing, and it is impossible to effectively evaluate whether it has self-healing performance, which makes the development of self-healing gel plugging material plugging technology severely restricted

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