一种新型交联缔合清洁压裂液体系的研究及评价  

STUDY AND EVALUATION OF A NEW CROSSLINKING ASSOCIATION VISCOELASTIC SURFACTANT FRACTURING FLUID SYSTEM

作　　者：张兴 王超[1] 欧阳坚[1] 朱卓岩[1] 王源源[1] 徐鸿志[2] 张明峰[2] 邓君宇 

机构地区：[1]中国石油勘探开发研究院 [2]中国石油集团工程技术研究院

出　　处：《钻采工艺》2016年第4期72-75,6,共4页Drilling & Production Technology

基　　金：中国石油股份公司勘探生产分公司"低成本合成聚合物压裂液体系研究"(编号:2015-40222-000001)

摘　　要：针对国内清洁压裂液中普遍存在的耐温性能较差的问题,研发了一套新型疏水缔合聚合物压裂液体系。该压裂液体系主要应用于130℃高温油藏的压裂施工,最终配方为0.45%聚合物稠化剂+0.4%交联剂+1%KCl,并进行了室内试验,对该体系的流变性、黏弹性、悬砂性和破胶性能进行了测试。研究结果表明,该体系耐温耐剪切性能良好,在130℃、170 s^(-1)下剪切120 min后黏度仍能保持在50 m Pa·s以上,加入破胶剂后该压裂液体系破胶快速且彻底,无残渣,对地层伤害小,便于返排,有利于压裂施工。In view of the problem of the poor heat resistance performance of clean fracturing fluid in China,a new type of hydrophobic association polymer fracturing fluid system was studied,which was mainly applied to fracturing operation of130℃ high temperature reservoir.And the final formula was 0.45% polymer thickener + 0.4% crosslinking agent + 1% KCl.The rheological properties,viscoelasticity,suspending ability and gel breaking properties of the fracturing fluid system were tested.The results showed that this system had good heat-resistance and shear-resistance performance,and the apparent viscosity remained above 50 mP a·s after 120 min shearing under 130℃ 、170s^(-1)and gel breaking was quick and thorough,no residue after adding gel breaker in the fracturing fluid system.The formation damage was low and easy flowback,which was advantageous to the fracturing operation.

关 键 词：清洁压裂液 疏水缔合聚合物 耐温 耐剪切 

分 类 号：TE357.12[石油与天然气工程—油气田开发工程]