注入段塞对空气泡沫驱油效果的影响

The slug affect oil displacement in the air foam flooding

泡沫驱特有的高粘度及在油层孔隙介质中渗流时不停消泡与起泡特点,使其即具有聚合物改善流度比、提高波及效率的作用,也能够抗高温高盐。通过室内驱替实验和数值模拟技术,依托高温高盐稠油的鲁克沁油田地质情况,研究泡沫注入段塞对驱油效果的影响。结果表明空气泡沫驱最佳注入段塞为:以改善水驱为主的深部调驱段塞(0.15 PV)和以段塞驱油为主的大段塞(0.45 PV)。泡沫段塞0.15 PV时,提高的采收率为8.59%OOIP,吨起泡剂增油量187.47 t/t,综合指数16.10;泡沫段塞0.45 PV时其提高的采收率为14.65%OOIP,吨起泡剂增油量106.60 t/t,综合指数15.62。

Foam flooding have high viscosity and keep defoaming and foaming in reservoir, make it improve mobility ratio, improve sweep efficiency as polymer flooding, can also resis- tance to high temperature and high salt. It researched foam injection slug for oil displacement effect through the indoor displacement experiment and numerical simulation technology on high temperature and high salt of thick oil field geological situation. The results show that best injection slug of air foam flooding is： to improve water flooding primarily deep adjustable drive slug （0.15 PV） and to slug oil displacement as long plug （0.45 PV）.Slug is 0.15 PV, enhanced recovery is 8.59 % 00IP,tons of foaming agent incremental oil 187.47 t/t, the comprehensive index 16.10,slug is 0.45 PV, enhanced recovery is 14.65 % OOIP,tons of foaming agent incremental oil 106.60 t/t, the comprehensive index 15.62.