再论我国发展注气提高采收率技术

RE-DISCUSSION OF EOR WITH GAS INJECTION IN CHINA

在我国未来的石油工业中，提高石油采收率处于愈来愈重要的地位，这将是一项迫切而重大的战略任务。我国油田类型多，地质情况复杂，应该多元化地发展该项技术，尤其是我国的低渗透油藏，虽然地质储量在50×10^8t以上，但动用程度很差。现根据最近在美国、加拿大查阅的资料，再论注气技术，希望对近混相驱注气技术、注N2推动与原油能混相的气体段塞（CO2、富含C2～C5中间分子量烃等）的混相驱技术、利用注气体混合物（CO2／C1、CO2／N2、C3／N2等）来改善单井吞吐的增产效果技术和轻质油油藏注空气驱（低温氧化）技术等予以重视，以此促进我国注气技术的发展。

EOR will play a more and more important role in China's future petroleum industry and will be an urgent and great strategic task. China's oilfields are various in types and complex in geologic conditions, thus multiple EOR technologies should be developed, especially for the low permeability oil reservoirs with total oil in place over 5 billion tons but few producing reserves. Based on the data obtained in America and Canada recently, gas injection technologies are discussed again. It is hoped to attach importance to the following EOR technologies, such as near-miscible displacement technology with gas injection, gas mixture injection technology (CO_2/C_1, CO_2/N_2, and C_1/N_2 etc.) and air injection in light oil reservoirs (low temperature oxidization), so as to promote the development of gas injection technologies in China.