NNMB／NAPS二元体系与原油界面张力研究

STUDY OF INTERFACIAL TENSION BETWEEN NNMB/NAPS BINARY SYSTEM AND CRUDE OIL

室内在模拟中原油田油藏温度条件下研究了双子表面活性剂NNMB与疏水缔合聚合物NAPS二元复合体系与原油的界面张力。考察了NNMB、NAPS、NaCl对二元体系／原油界面张力的影响。结果表明：NAPS对NNMB溶液界面张力值没有明显的影响；NNMB／NAPS二元体系中加入一定量的氯化钠,可以增加表面活性剂降低界面张力的效率；该体系与原油间的最低瞬态界面张力均低至10^(-3)mN／m。这种新型二元体系对于高矿化度油藏提高原油采收率具有很大的应用前景。

Based on the choice of NNMB/NAPS as a new binary system, the interfacial tension between NNMB/NAPS binary system and crude oil has been studied under imitating conditions of Zhongyuan oilfield, including effects of thickness of NNMB, NAPS and NaCl on the interfacial tension. Results show that NAPS has no obvious effect on the interfaciai tension NNMB so- lution, adding NaCI to NNMB/NAPS binary system helps surfacrant reduce interfacial tension, the interfacial tension between NNMB/NAPS binary system and crude oil is as low as 10^(-3) mN/ m. The new kind of binary system has wide application prospect in enhancing oil recovery of high - salty reservoir.