大港南部复杂断块油藏不同含水期开发调整方向分析研究

Study on adjustment of the exploitation plan of complex fault block reservoirs in different water-cut stage of development,southern Dagang oilfield

大港南部油田油藏类型多,各区块处于不同的开发阶段。其开发稳产难度逐年加大,本文从中低含水、高含水和特高含水油藏的不同含水期开发调整的最佳协同进行研究分析论证,对不同开发阶段油藏的稳产界限、注采井数比、采油速度、采液速度、极限含水和极限单井产量和注采井网重新细分组合调整等基本开发理念进行了分析,并对不同油藏的开发潜能和存在的危机进行了研究,提出了相应的技术对策。这对处于各个开发阶段的各类型油藏的高效开发具有重要的借鉴意义。

Southern Dagang oilfield consists of many reservoir types,and different blocks are in various stages of development.The difficulty of stable production is increasing year after year.The best adjustment of the exploitation plan is analyzed in the different stages of water cut from low to high.Based on stable production limits,injection-to-production-well ratio,oil recovery rate,liquid withdraw rate,limited water cut,limits of economic output and optimization of injection-production pattern,development potential and existing crisis of different reservoirs are studied.Then,corresponding technical countermeasures are put forward in the paper.This paper has an important referential significance for the efficient development of reservoirs in the different stages of exploitation.