国内外注气提高石油采收率技术回顾与展望

Review and prospects for the development of EOR by gas injection at home and abroad.

提高或改善石油采收率 (EOR或IOR)是油田开发永恒的研究主题之一。本文对世界注气EOR技术的发展作了概述 ,着重阐述了注气油田油藏描述、水气交替 (WAG)混相驱、近混相驱、轻油油藏注空气 (低温氧化 )采油、应用水平井进行气驱及注气单井吞吐等重要问题。综合国外经验和我国具体情况 ,指出发展我国注气事业的关键是气源问题 ,应采取多种途径解决。当前 ,要抓好注气驱先导试验 ,加强注气提高采收率的理论和实验研究 。

EOR or IOR is one of the eternal subjects of oilfield development. In this paper, a brief account of the development of EOR by gas injection in the world is given; some key problems are set forth in particular, such as reservoir description of gas injection oilfields, miscible flooding by water alternating gas (WAG), near miscible flooding, air injection (lowtemperature oxidation) recovery in light oil reservoirs, gas drive in horizontal wells, single well stimulation by gas injection and so on. According to the foreign experiences and concrete conditions in China, it is pointed out that the key problem for developing our business on gas injection is gas sources, which should be solved in many ways. Currently, we should pay attention to pilot tests of the gas drive, deepen the study of the theory and experiments on EOR by gas injection and reserve technologies and qualified persons.