泡沫稳定性能评价及泡沫分流效果试验研究

提供了一种泡沫分流酸化试验研究方法,对起泡剂、稳泡剂的性能进行了试验分析,采用多用途分流酸化试验装置分别进行了泡沫对岩芯的分流效果试验,不同渗透率岩芯的分流效果试验,模拟实际酸化施工过程的分流酸化试验。结果表明,采用泡沫分流技术,对并联岩芯酸化时能有效地实施分流,使低渗透岩芯吸酸量增大,能均匀改善不同渗透性岩芯的最终渗透率,提高酸化效果,同时采用该项技术有效地解决渗透率差异较大的多层油气藏均匀吸酸及均匀解堵问题,无需进行其它分层措施。

FOAM STABILITY EVALUATION AND EXPERIMENT STUDY OF DIVERTING EFFECT

A new approach to foam diverting acidizing has been put forward. The performance of foaming agent and foam stabilizer has been analyzed and some diverting effect experiments including foam temporary plugging effect experiment, cores with different permeability and diverting acidizing experiment simulating actual acidizing treatment have been conducted by using versatile acidizing diverting experimental rig. Results show that thefoam divert technique can divert effectively in the experiment when acidizing parallel cores, increase the acid intake of low permeability core, improve equably the final permeability of cores of different permeability and enhance acidizing effect.This technique can solve problems of even acid intake and evenremoving plug in multi-zone reservoir with different permeability and do not need special separate method.