辽河油田海1块“2+3”调驱提高原油采收率技术先导性试验

Pilot Test for "2+3" Profile Control Technology for Increasing Oil Recovery in Hai-1 Block of Liaohe Oilfield

针对辽河油田注水开发稠油油藏海1块,提出了"2+3"调驱来提高原油采收率,对其适应性进行了评价研究。室内实验和矿场先导性试验结果表明,"2+3"调驱技术可进一步改善水驱开发效果。室内非均质高低渗双管物理模型实验表明,注入0.3 PV"2+3"调驱体系,驱油效率提高了18%以上。3个试验井组共对应13口油井,措施后10口井有增油效果,最高日增油量29.8 t,综合含水率降低了7.2%。截至到2009年12月累计增油量38 609 t,阶段提高采收率2.7%,调驱效果明显。

A ＂2 ＋ 3＂ profile control technology for increasing oil recovery in Hai -1 Block, a waterflood- ing heavy oil reservoir of Liaohe Oihqeld was developed, and the suitability of this profile control technology was evaluated. The results of laboratory tests and the pilot tests in oil field have shown that the ＂2 ＋ 3＂ profile control technology can improve the effect of flooding development further. The laboratory high permeability and low permeability dual tubing physical model experiments have shown that the oil displacement efficiency can be increased by more than 18% for the most part when 0.3 PV of ＂2 ＋ 3＂ profile control system are used. The three well groups in which the tests were conducted included thirteen oil weUs. The oil production in ten of the oil wells were increased with maximum average daily oil production increase at average level of 29.8 t, and the general water percentage was reduced by 7.2% after the profile control system was used. Up to December of 2009, accumulated oil production increase reached 38 609 t and the oil recovery efficiency was increased by 2.7%, indicating that the effect of the profile control system was good.