驱油体系／原油间的瞬时界面张力

TRANSIENT INTERFACIAL TENSIONS BETWEEN COMBINATION FLOODING SYSTEMS AND CRUDE OIL

考察了活性剂浓度、碱浓度和聚合物种类及浓度对复合驱油体系与原油间瞬时界面张力（γｔ）的影响。结果表明，在一定碱和盐浓度条件下，０．３％的石油磺酸盐存在即可使γｔ降至超低。室内模拟驱油试验结果表明，化学驱提高采收率２７．５％。本研究对于三次采油具有一定指导意义。

Transient interfacial tension between mixed systems of petroleum suuonate(PS)/alka-line/polyacrylamide consisting of n-C4H9OH,NaCl and Shengli crude oil have been studied.Experimental results indicated that transient interfacial tension of mixed systems were ultra-low when the PS and Na2CO3 come up to a certain concentration,Synergistic effect betweenPS and petroleum acid soap have been observed.The oil recovery of a system with 0.3%PS,1.2%Na2CO3,0.09%polyacrylamide,1.0%n-C4H9OH and 0.6%NaCl in core is 27.5%.On the average,21. 3cm3 oil was displaced with each gram of chemical agent.