摘要
为了拓宽海上油田提高采收率技术的选择范围，有效开发海上稠油油田，选取满足泡沫调驱技术油藏筛选条件的QHD32—6油田北区开展了氮气泡沫调驱室内实验研究。在考虑海上平台空间有限的情况下，评价和研究了较低气液比（1：2）氮气泡沫在岩心中的流动特点。实验结果表明：海上稠油油田氮气泡沫驱的合理气液比为1：2～2：1，最佳泡沫剂质量分数为0．3％～O．5％；气液比为1：2时，氮气泡沫调驱能够较好地改善水驱效果，提高原油采收率幅度在26％左右。
In order to enlarge selection of EOR techniques and efficiently develop offshore oilfields, a laboratory research on nitrogen foam adjustment of oil displacement was made for the northern QHD32-6 oilfield which meets the technique requirements of nitrogen foam adjustment. Considering the limited space of offshore platforms, the flow behavior in cores of nitrogen foam with a lower gas-fluid ratio （1：2） was studied and evaluated. According to the research results, the reasonable gas-fluid ratio is 1 ： 2 to 2 ： 1, and the optimal foam mass fraction is 0.3 % to 0.5 % for Bohai offshore heavy oilfields. When the fluid-ratio is 1：2, nitrogen foam adjustment can quite greatly improve water flooding efficiency, and increase oil recovery by around 20%.
出处
《中国海上油气》
CAS
2008年第5期308-311,共4页
China Offshore Oil and Gas
基金
中海油田服务股份有限公司科技攻关项目(JSKF2004YJ23)部分研究成果
