摘要
为提高泡沫复合驱油技术在大庆油田聚驱后应用的可行性，利用高压泡沫驱油实验装置，考察了高压条件下发泡剂体系中聚合物浓度、系统回压、气液比等对泡沫复合驱油效率的影响。实验结果表明：在高压条件下，发泡剂体系中聚合物浓度在600～1000mg／L时，泡沫复合驱采收率较大；泡沫复合驱实验压力越高，驱油效果越差；气液比过大，易出现气体窜流现象，降低泡沫复合驱的效果，气液比为1：1时泡沫复合驱提高采收率效果最好。考虑到实际油层和剪切降解情况，建议选择聚合物浓度为1000mg／L。
In order to improve the feasibility of foam combination flooding technology in Daqing Oilfield after polymer flooding, the high-pressure foam flooding equipment is used to investigate the influence of polymer concentration, system backprcssure and gas/liquid ratio of the foaming agent system on the displacement efficiency of foam eombination flooding at high pressure. The experimental result shows that： when the polymer concentration in foaming agent system is between 600 - 1 000 mg/L at high pressure, the recovery factor of foam combination flooding is relatively high. The higher the pressure of foam combination flooding is, the worse the displacement effect is. If the gas/liquid ratio is too big, the phenomenon of gas channeling tends to appear easily, which reduces the effect of foam combination flooding ; when the gas/liquid ratio is 1 ： 1, the effect of foam combination flooding on enhancing oil recovery is the best. Considering the actual reservoir conditions and shear degradation, the suggested polymer concentration is 1 000 mg/L.
出处
《大庆石油地质与开发》
CAS
CSCD
北大核心
2011年第2期140-144,共5页
Petroleum Geology & Oilfield Development in Daqing
基金
中国石油天然气股份有限公司科技重大专项“聚合物驱后提高采收率技术”（2008E-1210）资助.
关键词
泡沫复合驱
聚合物
气液比
foam combination flooding
polymer
gas/liquid ratio
