Application of Enzyme Technology in Fracturing and Acidizing

Fracturing and acidizing are important stimulation treatment in oil and gas fields. However,such problems as incomplete gel breaking,serious damage of residue on formation,poor environment-friendliness and difficult control of acid treatment of conventional fracturing fluid have restricted transformation effects of fracturing and acidizing all the time. Enzyme technology,as a new non-toxic,harmless and environmental-friendly technology,is increasingly applied in fracturing and acidizing treatment in different kinds of oil and gas fields,which can effectively solve the above-mentioned problems. Introduced are actual application situations of enzyme technology in fracturing and acidizing treatment in oil and gas fields for the past few years,provided are application examples of using enzyme as gel breaker,bactericide and acidifier in fracturing and acidizing treatment,described is the mechanism of enzyme fracturing technology and predicted is the development trend of enzyme technology in fracturing and acidizing field.