川渝油气田压裂用生物酶破胶技术的研究与应用

近日,西南油气田公司天然气研究院(以下简称天然气研究院)申请的《一种用于油气井酸化的自生气配方》发明专利获得国家知识产权局授权。至此,天然气研究院在泡沫流体研究方面已获得两项发明专利授权,一项实用新型专利授权。专利《一种用于油气井酸化的自生气配方》(专

Preparation and application of a bio-enzyme gel breaker in Sichuan and Chongqing oil and gas field

A new type of bio-enzyme breaking fracturing fluid was prepared, which is fit for Sichuan and Chongqing gas field, through a series of laboratory evaluation experiments. The bio-enzyme gel breaker is specific for the hydroxypropyl guanidine gum thickener, and it has good compatibility with other additives of fracturing fluid. Compared with conventional gel breaker, it has the features such as more thoroughly gel breaking, low viscosity of backflows, low residue content, low formation damage. By using it in three gas wells in Hechuan gas field, the application results showed that this new type of bio-enzyme breaking fracturing fluid system can meet the requirements of fracturing operation, in which the residues of backflows is lower than conventional breaker system, and the production of the two wells is better.