发展三次采油为主的提高采收率新技术

发展三次采油为主的提高果收率新技术，具有很大的潜力。如果通过各种三次采油方法提高采收率１２．４％，那么由此增加的可采储量相当于全国目前剩余可采储量的５６％。鉴于各种三次采油方法中，聚合物驱非常适合我国陆相储层的地质条件，在当前应首先抓紧矿场聚合物驱的工业化试验应用，尽快形成生产能力。其次是加强化学复合驱提高采收率机理的研究，因为这项技术提高采收率的幅度是聚合物驱的两陪多。但是此法使用的表面活性剂量太大，机理复杂，技术难度大，目前推广使用困难多，故需进一步加强研究。第三是积极探索微生物采油技术、注气混相驱和非混相驱、热采、各种物理场提高采收率等技术的研究。

Development of new techniques for raising tertiary recoveryratio

he developfnent of new techniques for raising tertiary recovery ratio is very necessary.If all tertiary recovery techniques increase recovery ratio by 12- 4%, the increased recover-able oil reserves will be 56% of present remaining recoverable reserves in China. First of all ,we must realize the industrial application of polymer flooding as early as possible because it isvery applicable to the geological conditions of continental reservoirs in China. The mecha-nism of chernical combination flooding must be studied because its increased recovery ratio istwo times that of polymer flooding. Chemical conibination flooding is characterized by toomuch surface active agent for use, complicated mechanism and difficult popularization;therefore, thefurther research on it is necessary. Furtherrnore , we need to seek other tech-niques to improve recovery ratio, such as microbial recovery, gas injection niiscible (or non-miscible) drive . thermal recovery and various physical field rnethods.