一种选择性堵水界面凝胶的研制  

Development of Selective Water Plugging Interfacial Gel

作　　者：李军[1,2] 王犁[2,3] 李勇[1] 陈启龙 王莎[1] 鲁红升 Li Jun;Wang Li;Li Yong;Chen Qilong;Wang Sha;Lu Hongsheng(Sinopec Northwest Oilfield Company,Urumqi,Xinjiang 842012,China;Southwest Petroleum University,Chengdu,Sichuan 610500,China;Oil&Gas Field Applied Chemistry Key Laboratory of Sichuan Province,Chengdu,Sichuan 610500,China)

机构地区：[1]中国石化西北油田分公司,新疆乌鲁木齐842012 [2]西南石油大学,四川成都610500 [3]油气田应用化学四川省重点实验室,四川成都610500

出　　处：《特种油气藏》2023年第3期155-160,共6页Special Oil & Gas Reservoirs

基　　金：国家自然科学基金“基于CO_(2)/N_(2)开关特性的O/W型稠油乳状液的构建和性能研究”(21403173);四川省杰出青年基金“面向含油废固处理技术的新型CO_(2)开关溶剂体系”(2019JDJQ0047);油气田应用化学四川省重点实验室开放基金“油诱导增稠型离子液体表面活性剂的制备及其作为非均相驱油剂的应用初探”(YQKF202112)。

摘　　要：针对高分子聚合物选择性堵水凝胶油水选择性差、注入压力大等缺点,利用N,N-二甲基环己胺分别与硬脂酸、花生酸、山嵛酸,通过酸胺中和反应合成小分子凝胶因子,该小分子凝胶因子能够在油水界面上自发形成界面凝胶。利用偏光显微镜及流变仪探究了界面凝胶的微观形貌以及流变学性能,利用驱替实验考察了小分子凝胶因子在油水界面的选择性堵水性能。结果表明:小分子凝胶因子在油水界面形成的界面凝胶的黏度可达105 mPa·s以上,屈服应力高达100 Pa;驱替实验证明,小分子凝胶因子能够选择性封堵水通道,突破压力梯度达到2.74 MPa/m,采收率提高了21.3个百分点。该小分子凝胶因子具有良好的油水选择性,能够有效提高原油采收率,具有推广应用价值。In response to the disadvantages of poor oil-water selectivity and high injection pressure of high polymer selective water plugging gels,small-molecule gel factors were synthesized through the acid-amine neutralization reaction between N,N-dimethylcyclohexylamine and stearic acid,arachidic acid and behenic acid respectively,which can spontaneously form interfacial gels at the oil-water interface.The microscopic appearance and rheological properties of the interfacial gels were investigated by polarizing microscope and rheometer,and the selective water plugging performance of the small-molecule gel factor at the oil-water interface was investigated by displacement experiments.The results show that the viscosity of the interfacial gel formed by the small-molecule gel factor at the oil-water interface can reach 105 mPa·s or more,and the yield stress is as high as 100 Pa;the displacement experiment proves that the small-molecule gel factor can selectively block the water channel,the breakthrough pressure gradient is up to 2.74 MPa/m,and the recovery rate is enhanced by 21.3 percentage points.The small-molecule gel factor has good oil-water selectivity and can effectively enhance the recovery of crude oil,so it is worth to be promoted and applied.

关 键 词：选择性堵水 小分子凝胶因子 界面凝胶 脂肪酸 

分 类 号：TE39[石油与天然气工程—油气田开发工程]