摘要
天然羧酸盐驱油剂ZY5是以天然混合羧酸盐为主、复配以非离子和两性表面活性剂及助剂得到的表面活性剂驱油剂。研究了ZY5在高温、高盐、高钙镁条件下的界面张力及岩心驱油能力。结果表明 :ZY5可抗盐达 1.5×10 5mg/L ,同时抗钙离子 5 0 0 0mg/L ,抗镁离子 70 0mg/L ,40— 70℃时界面活性优异 ,界面张力保持 10 -3 mN/m ,70— 10 5℃时界面活性良好 ,界面张力保持 10 -2 mN/m ,在 70℃密闭老化 6 36小时后可基本保持界面活性 ,在高盐高钙条件下对模拟油有较强的增溶能力 ;在 14块天然岩心上进行的 5组驱油实验中 ,ZY5使高含水 (>95 % )岩心的采收率平均提高 12 .4%
ZY5 is composed of natural mixed carboxylate(77%), nonionic and amphoteric surfactants(10%) and auxiliaries(13%). The interfacial tension( IFT ) with crude oil and oil displacing efficiency of ZY5 solutions are investigated at the conditions of high temperature, high salinity and high Ca 2+ +Mg 2+ contents. It is shown that ZY5 is tolerent to salt up to 1.5×10 5 mg/L, to Ca 2+ —5×10 3 mg/L and to Mg 2+ —7×10 2 mg/L; maintains IFTs of 10 -3 mN/m at 40—70℃, of 10 -2 mN/m at 70—105℃, and less changed after ageing at 70℃ in 636 hrs; its solubilizing power for oil is rather strong. An enhancement in oil recovery of 12.4% in average is obtained in 5 sets of reservoir core flooding eperiments on 14 cores with ZY5 solutions(1.0—3.0 g/dL).
出处
《油田化学》
CAS
CSCD
北大核心
2001年第2期173-176,共4页
Oilfield Chemistry
关键词
驱油剂
天然混合羧酸盐
复配表面活性剂
界面张力
岩心驱油能力
高温高盐高钙镁油藏
Flooding Agent(EOR Agent)
Natural Mixed Carboxylate
Surfactants in Combination
Interfacial Tension
Oil Displacing Capacity in Cores
Hostile Resevoirs(High Temperature, Salinity and Ca 2+ +Mg 2+ Content Reservoirs)
