过硫酸铵与生物酶压裂破胶技术对比研究

Ammonium persulfate and enzyme technology comparative study gel breaking fracturing

压裂是低渗或特低渗油气井增产、注水井增注的一项重要举措,压裂液破胶不及时、不彻底乃至在裂缝中形成滤饼,降低了油层裂缝的导流能力,因此压裂液的破胶效果直接影响压裂液的返排和增产,本文主要结合延长油田子长采油厂低渗或特低渗油层的情况,针对生物酶与过硫酸铵破胶各自机理,半乳甘露聚糖生物酶与压裂液添加剂的配伍性,两者与油层水质配伍性及胍胶残留物对地层的伤害情况和现场实际应用后的效果进行综合对比,寻求最佳的破胶剂为油田压裂破胶剂找到合理的解决方案。

The fracture is hypotonic or ultra-low injection wells by injection is an important step, permeability oil and gas production wells, fracturing fluid gel breaking is not timely, thorough and even the formation of cracks in the cake, reducing the diversion reservoir cracks capacity, so the gel breaking fracturing fluids directly influences the fracturing fluid flowback and production, combined with this paper to extend the oil extraction plant Zichang hypotonic conditions or ultra-low permeability reservoir for enzymes with ammonium persul- fate gel breaking their mechanism, galactomannan enzyme and fracturing fluid additive com- patibility, compatibility between the two and reservoir water quality and guanidine glue residue on the formation damage and field application of the results after a comprehensive comparison, to find the best breaker breaker for the oil field fracturing find a reasonable solution.