三次采油化学驱油技术发展现状

Strategic Development of Enhance Oil Recovery In China

三次采油是油田开发技术上的一次飞跃,与二次采油相比,它借助物理和化学的双重作用,提高驱油的波及体积和效率。经过近20年的研究和实践,中国的化学驱在技术、规模、效果等方面均已走在世界前列。近30个矿场的表明,聚合物驱可提高采收率10%,复合驱可提高采收率15%~20%。1997年,中国聚合物驱增油量达303×104t,＂九五＂期间增油1500×104t。中国的油田多为陆相沉积和陆相生油,预测二次采油的平均采收率为34.2%,近百亿吨储量留在地下。这一条件为中国的三次采油提供了巨大潜力。今后,中国的三次采油要在驱油机理、深化对油藏的认识、降低驱油剂成本和用量、先期深度调剖、提高工程的整体经济效益等诸方面加强研究,最大限度地提高采收率和经济效益。

Enhanced Oil Recovery is a leap in oil and gas development engineering field.Compared with water flooding,it enhances swept volume and improves efficiency of water flooding by use of the dual function of physical and Chemical.After near 20 year research and the practice,the technology of Chinese chemical flooding advanced to another nation in scale and efficiency and so on in the world.Nearly 30 experiments indicated that the polymer flooding could be possible to enhance recovery ratio 10%.Compound flooding could be possible to enhance recovery ratio 15%~20%.In 1997,the oil mass of Chinese polymer flooding increased to 303×104t.During the ＂95＂ period the number increased to 1500×104t.Most of Chinese oil fields belong to oil-generating strata and were built-up by continental deposit People forecast that the average recovery ratio of water flooding is 34.2%,and the nearly 10 billion tons oil reserves remain underground.This condition has provided the great potential for Chinese enhanced oil recovery.From now on,Chinese enhanced oil recovery must be improved in the oil displacement mechanism,the deeply understanding the reservior,reducing cost and amount of the chemical agent,the depth profile controlled,enhancing the whole economic efficiency and so on.Then the recovery and economic efficiency could be abtained in most degree.