摘要
对于高含水油藏后期开采,采用气水交替技术可以提高波及效率、改善油层的动用程度,达到提高原油采收率的目的。由于泡沫可以作为驱替介质的流度控制剂,如果在气水交替注入方式中采用合适的泡沫,则可以改善吸水(吸气)剖面,提高油层动用程度,从而显著改善气水交替注入方式的开采效果。针对油藏地质特点,在不同条件下对几种起泡剂的发泡能力和稳定性进行了测试评价并优选了起泡剂用量。综合考虑几种因素后选择出性能最佳的一种起泡剂,能够满足气驱过程中选择性地堵塞高含水层的要求,起到调驱和调剖的作用。
For production of high-water-cut reservoirs, water alternating gas (WAG) process could be adopted to improve the sweep efficiency, increase the producing reserves and enhance the oil recovery. Foamer as a mobility-control agent for a displacing medium could be properly used in WAG process in order to adjust the water or gas injection profile, improve the productivity and obtain better development effectiveness. In view of specific reservoir and geologic features, the behavior such as foamability and stability of several foamers are tested and evaluated under the different conditions, and the foamer volumes are optimized. By considering the relevant factors, the best foaming agent is obtained, which can meet the requirements of selectively plugging the water zones by its displacing adjustment and profile control during the process of gas drive.
出处
《新疆石油地质》
CAS
CSCD
2004年第6期644-646,共3页
Xinjiang Petroleum Geology
基金
"油气藏地质及开发工程国家重点实验室"开放基金资助项目(编号:PLN9901)
