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经多年开发双河油区长6油藏地层压力下降,产量持续递减,严重制约了油藏的有效开发。以Arps产量递减方法为基础对研究区产量递减规律及其递减原因进行分析研究,结果表明,双河油区长6油层组产量递减属于双曲线递减,注水量下降及供液不足是产量递减的主要原因。同时针对近年来低产低效井比例逐年增加的现状,从地质、开发等因素对低产低效井成因进行分析,针对储层物性差,天然能量较弱,注采井距偏大,注采对应率低。提出了4种相应的调整对策:整体压裂,加强注水,减小注采井距,增加注水井及注水井补孔压裂。这对于减缓油田产量递减,提高油田原油采收率,改善开发效果具有重要意义。
After years of development, the reservoir pressure of Chang6 reservoir in Shuanghe oil field has been reduced and the output has been decreasing continuously, which has seriously restricted the effective development of the reservoir. Based on the Arps production declining method, the law of diminishing production and its decreasing causes were analyzed. The results show that the decrease of production in Chang 6 reservoir belongs to hyperbolic decrease, the decrease of water injection quantity and the lack of liquid supply are the production declining main reason. In view of the current situation that the proportion of low-productivity and low-efficiency wells has increased year by year in recent years, the causes of low-productivity and low-efficiency wells are analyzed from the aspects of geology and development. In view of poor reservoir physical properties, weak natural energy, large injection well spacing, Low rate. Four corresponding adjustment measures are put forward, such as overall fracturing, strengthening water injection, reducing the well spacing between injection and production, and increasing the fill fracturing of water injection well and water injection well. This is of great significance for reducing the production decline of oilfields, increasing the recovery rate of crude oil in oilfields and improving the development effect.