压裂改造在沙埝低渗透油藏开发中的实践与认识

The practice and cognition of fracturing in the development of Shanian Oilfield with low permeability

陈军

Chen Jun

中国石化江苏油田分公司地质科学研究院, 江苏扬州 225009

Geologic Science Research Institute of Jiangsu Oilfield Branch of SINOPEC, Yangzhou 225009, China

沙埝油田是江苏油区一个以低渗透砂岩油藏为主的复杂断块群油藏,在开发中存在低产井多、特低渗区块难以动用、注水受效差、层间矛盾突出等问题。针对油田特有的地质、油藏特征,选择压裂改造作为改善油田开发效果的主要措施,并进行了压裂工艺的分析,实施后取得了显著的增产效果,最后通过总结沙埝油田压裂改造成功的经验,得到了关于压裂成功与失败的基本条件和初步认识。

Shanian Oilfield, which consists of many small fault blocks, is a low permeability and extremely low sandstone reservoir. Unfortunately, the productivity, injectivity index and heterogeneity are unfavorable. According to the special characteristics of the geology in this area, we put forward fracturing to improve the effect of development. At the same time, we optimize fracturing design and the effect of fracturing is very obvious. Finally, both the applicable condition and work experience are suggested in this paper.