第43卷第4期
石油与天然气化工
CHEMICAL ENGINEERING OF OIL & GAS
川中沙溪庙致密油藏压裂液技术研究及应用
孙川刘友权熊颖郑凯吴文刚陈鹏飞张倩
（中国石油西南油气田公司天然气研究院）
摘要川中沙溪庙致密油藏为特低孔、低渗致密储层，压裂工艺要求先以滑溜水大排量泵注
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方式在地层中形成复杂缝网，再以冻胶压裂液造主缝，形成大规模的连通性体积缝网。将聚丙烯酰胶”混合压裂液技术。其中,滑溜水具有低摩阻、高效防膨等特点；冻胶压裂液具有耐剪切、低伤害等特点；混合压裂液体系的破乳效果好、返排能力强。现场试验表明：“滑溜水十冻胶”混合压裂液技术具有良好的储层改造效果，在G36并、G117并应用获得成功，现场降阻率达61.5%～64.8%、返排率>40%，返排液油水界面清晰，获井口测试产油45.1t/d。
关键词沙溪庙压裂滑溜水冻胶破乳伤害
中图分类号：TE357.1
文献标志码：A
D0I:10.3969/j.issn.1007-3426.2014.04.014
Research and application of tight oil reservoir fracturing fluid in
Shaxi Temple layer of Central Sichuan
Sun Chuan,Liu Youquan,Xiong Ying,Zheng Kai,Wu Wengang,Chen Pengfei,Zhang Qian(Research Institute of Natural Gas Technology,PetroChina Southwest Oil and
Gasfield Company,Chengdu610213,Sichuan,China)
Abstract: The tight reservoir of Sichuan Shaxi Temple layer has characteristics of extremely low porosity and low permeability , and the fracturing process requires to pump slickwater with large emission to form complex fracture networks in formation,then pump gel fracturing fluid to create main fracture and form a large volume of connective fracture network . Due to the compos-ite application of polyacrylamide slickwater and low molecular guar gum fracturing fluid , a mixed fracturing fluid technology of "slickwater + crosslinked gel has been developed, which is suit-able to Shaxi Temple reservoir in Central Sichuan . Slickwater has characteristics of low friction and high clay stable performance , crosslinked fracturing fluid has characteristics of excellent shear resistance and low core damage , and the mixed fracturing fluid has good demulsification performance and high flow back rate . Field test results show that slickwater + crosslinked gel" technology has good effect of reservoir stimulation , which was successful applied in G36 well, G117 well, the drag reduction rate reached 61.5% ~64.8% , flowback rate was more than 40% , interface of the flowback fluid and the oil is clear and testing oil production achieved 45 .lt /d.
Key words : Shaxi Temple ,fracturing slickwater , crosslinked gel ,demulsification ,damage 项目来源：中国石油股份公司科技部科研计划项目“四川盆地保罗系石油勘探开发关键技术研究”（2012E-2601）。
作者简介：孙川（1985一），硕士，工程师。2010年毕业于西南石油大学并获硕士学位，现在中国石油西南油气田公司天然气研究院从事压裂液方面的研究工作。地址：(610213)四川省成都市华阳天研路218号天然气研究院。电话：028-85604526。 E-mail ;sun_chuar@ petrochina .com .cn