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石油与天然气化工
CHEMICAL ENGINEERING OF OIL & GAS
CO，刺激响应型清洁压裂液的室内研究
李雨威12黄志宇1杨玲玲敬显武鲁红升 1.西南石油大学化学化工学院2.中国石化西南工程有限公司固井分公司
2017
摘要合成正辛酸酰胺丙基叔胺(DOAPTA)与阴离子表面活性剂油酸钠(NaOA)复配.得到一种能够对CO?刺激响应的清洁压裂液。当DOAPTA-NaOA以物质的量比为0.8：1配制成总浓度为 100mmol/L的溶液，在C02作用下，黏度上升最高达2.92Pa·s。流变性测试表明：体系具有黏弹性流体行为；之后滴加NaOH溶液，体系即可转变至最初的低黏状态，实现彻底破胶。该体系增黏和破胶均容易进行，悬砂能力较强（1.64～1.8cm/h），耐温性能好（60℃），有望用于油田压裂作业中。
关键词清洁压裂液蠕虫状胶束CO刺激响应性能评价
中图分类号：TE357.1+2文献标志码：ADOI；10.3969/j.issn.1007-3426.2017.05.015
Laboratorystudyof theCO2-responsivecleanfracturingfluid Li Yuwei'-2, Huang Zhiyu' , Yang Lingling', Jing Xianwu' , Lu Hongsheng
1. College of Chemistry and Chemical Engineering ,Southwest Petroleum University, Chengdu,
Sichuan,Chind; 2. Cementing Compamy of Sinopec Xinan Oilfield Seruice Corporation, Deyang, Sichuan, Chind Abstract: N, Ndimethyl octylamide-propyl tertiaryamine (DOAPTA)was synthesized and then interacted with the anionic surfactant sodium oleate (NaOA ), a CO2-responsive clean fracturing fluid system was obtained. When the mixed solution of DOAPTA-NaOA was prepared at the concentration of 100 mmol/L with the molar ratio of O.8 : 1, followed by the introduction of CO2, the apparent viscosity of solution reached up to the maximum (2.92 Pa · s). Rheological test indicated that the solution system behaved as a viscoelastic fluid , which confirmed the formation of wormlike micelle structure. Moreover, it switched back to the original low-viscosity state by subsequent adding 1% aqueous solution of NaOH, then led to the breakdown of fracturing fluid. The thickening and breaking glue of the system are easy to carry out , sand.carrying ability is strong (1.64-1.8 cm/h), and temperature performance is very good (6o C). It is expected to be used in oilfield fracturing operation
Key words : clean fracturing fluid , wormlike micelle, CO2 -response, performance evaluation
压裂是改善低渗透油藏的主要开发手段，是提高
低渗透油田开采效率的有效措施之一。由于低渗透油藏的物性条件复杂，对压裂液的敏感性强。因此，有效控制和降低压裂液的伤害，进一步提高压裂措施效果，
基金项目：四川省教育厅创新团队项目（13TD0025）。
是低渗透油田开发的关键。目前，常规压裂液主要采用改性羟丙基瓜胶压裂液，但始终存在水不溶物和破胶不彻底现象，不可避免地对储层造成伤害[2-3]
黏弹性清洁压裂液是指在盐水中添加表面活性剂
作者简森霞威（1989一），助理工程师，2012年毕业于西南石油大学应用化学专业。现就读于西南石油大学化学化工学院化学工程专业额数据6级。E-mail；82599160@qq-com