南海某油田中块流一段细分层系方案研究

Research on subdivision of series of strata in L1 member of middle block in Nanhai Oilfield

南海某油田中块流一段处于开发中期,现在存在的主要问题是多层合采/合注层间干扰严重,油井含水量上升快,产量递减快,油井严重结垢,修井比较困难。文中主要综合了生产测井资料、调整井的测井解释结果及储层精细描述,分析剩余油的分布特征,进而分析流一段的潜力,在此基础上提出中块流一段各生产井细分层系方案。细分层系实施效果好,提高了流一段的采收率。

During the middle production period in Liu-1 member of the middle block in a oilfield,there are the major problems as follows:a)multi-layers production and multi-layers injection cause a bad interference;b)water cut quickly rise and oil production quickly decrease;c)oil well scales seriously and repairing well are very difficult.Aiming at these problems,this paper analyzes the characteristics of the residual oil distribution with production logging and fine reservoir description,and the producing potential of Liu-1 member.Based on the analysis,we put forward the technology of subdivision of series of strata,which enhances the recovery ratio of Liu-1 member.