一种新型压裂预前置液的研制

Development of a New Kind of Prepad

苗　宏¹,李明志¹,李凤霞¹,何　伟²,杨永平¹,余惠军³

Miao Hong , Li Mingzhi, Li Fengxia, et al

1.中原油田分公司采油工程技术研究院,2.中原油田分公司天然气管理事业部,3. 中原油田分公司信息中心

Oil Pruduction Engineering Technology Institute , Zhongyuan Oilfield Company , SINOPEC, Henan 457001 , P. R. China

针对气藏压裂改造中要求压裂液伤害低、返排率高、加砂规模大等特点,分析了压裂改造对地层造成的伤害,经室内试验研制了ZH - 1 压裂预前置液,并重点介绍了压裂预前置液的破乳、降低压裂液表(界) 面张力、助排等特点。现场试验表明,ZH - 1 预前置液对降低地层伤害、提高返排效率、提高压裂施工效果有着重要意义。

Based on such characteristics as low harm , high efficiency in fracture fluid returning and bigger injection of propant required , analysis has been made of the pollution which will be caused to reservoir formation. A new kind of prepad has been developed. In this article , detailed explanation has been exercised of such features as demulsibility , promotion of fluid dischange by the surfacetension of fracture fluid. The successful application of the prepad indicates the important significance of the prepad in terms of its such functions as low harm , high efficiency in fracture fluid returning and improvement of frac effectiveness.