A kind of biological enzyme fracturing gel breaker and its application

Abstract

A bio-enzyme fracturing gel breaker, consisting of 5-10 parts of vitamin glycosidic bond specific enzyme, 5-10 parts of starch glycosidic bond specific enzyme, 5-10 parts of guar gum glycosidic bond specific enzyme, 5- It is made by mixing 15 parts of BIO-P bioactive agent and 55-80 parts of water. It can be used instead of other commonly used gel breakers. The dosage is 20-35kg. It catalyzes B(1-4) on the surface of guar gum molecules Glycosidic bonds, to crack them, and finally crack the polysaccharide form of guar gum molecules into irreducible monosaccharides or disaccharides, and the viscosity becomes thinner, so that the fracturing fluid raffinate can be flowed back more stably from the proppant packing , to reduce polymer damage, to improve the production efficiency of oil and gas production, the invention has a thorough gel breaking, can eliminate the damage of guar gum residue, and solves the problems of cold damage, water damage and residue damage, and has good environmental protection effect and wide application range Wide range, strong compatibility, thorough glue breaking, simple operation and high cost performance.

Description

technical field [0001] The invention relates to an oilfield production stimulation agent, in particular to a biological enzyme fracturing gel breaker and application thereof. Background technique [0002] Biological enzyme is a kind of inactive catalyst based on protein, which is developed by modern biochemical technology such as modern genetic engineering, cell engineering and enzyme engineering, and has the advantages of rapidity, high efficiency and environmental protection. In recent years, the application of biological enzymes in foreign oil fields such as the United States, Mexico, Venezuela, Indonesia and European countries has achieved excellent results, and the number of wells used has increased by more than 35% every year. A well-known foreign oil company has used biological enzymes every year. 48% of the number of wells. [0003] At present, 22 kinds of microbial environmental protection enzymes have been researched and developed. These biological enzymes are no...

AI Technical Summary

Problems solved by technology

[0006] In order to overcome the shortcomings of the prior art, the object of the present invention is to provide a bio-enzyme fracturing gel breaker and its application, which breaks the gel completely, can cause damage to the residue of gu