喇嘛甸油田泡沫复合驱油效果室内研究

多元泡沫复合体系由聚合物、碱、表活剂、天然气组成.喇嘛甸油田聚合物驱取得了较好的效果,但仍有50%左右的剩余储量.为进一步提高聚驱后采收率,在喇嘛甸油田开展了聚驱后泡沫复合驱现场试验.在试验中,通过对表活剂种类及浓度的筛选、碱浓度的筛选、聚合物体系对性能的影响以及水质对泡沫体系性能的影响等研究,初步确定了泡沫体系配方.通过室内岩心驱油实验,研究了聚合物相对分子质量、气液比、注入速度、注入方式等对泡沫体系聚驱后驱油效果的影响,为矿场试验提供了有效的依据与指导.

Lab research on displacement effect of foam flooding in Lamadian Oilfield

The foam multisystem consists of polymer, alkaline, surfactant and natural gas. The polymer flooding in Lamadian oilfield has achieved good displacement results, but there is about 50% remaining reserves there. In order to further enhance the oil recovery factor, the test of foam muhisystem flooding after polymer flooding is progressed in Lamadian oilfield. Through the test, the foam system formula is determined primarily based on the selection of surfactant type and concentration, selection of alkaline concentration, effect of polymer system on the performance and effect of water quality on foam system, etc. According to core displacement tests, the effect of some factors, such as polymer molecular weight, gas fluid ratio, injection rate and injection mode, on foam system after polymer flooding is studied. The research is useful for field test.