胜利油田高含水期油藏水驱精细调整技术方向

Fine Adjustment Direction of Water Flooding in High-Water Cut Oil Reservoirs of Shengli Oilfield

以胜利油田为代表的高含水期油藏精细描述和水驱调整技术向精细化方向发展,为适应高含水期油藏精细挖潜的需要,近几年储层构型研究、低级序断层描述和层内剩余油分布预测技术得到不断发展,层系细分重组,采取井网加密调整和完善注采系统等措施改善了油田水驱开发效果。分析了制约整装构造、复杂断块和低渗透油藏大幅度提高水驱采收率的问题,提出了不同类型油藏水驱精细调整的技术方向。在陆相油藏高含水后期开发阶段,需要进一步加大层系细分重组,采取井网立体加密调整、水平井单层开发、改善水质、调整注水产液结构等措施,在井网优化调整的基础上,综合应用各种工艺技术对储层进行控制和改造,实施精细注水和有效注水开发,提高注采系统的针对性和有效性,以均匀控制驱替剖面。

Fine reservoir description and adjustment technology for the high-water cut Oilheld such as Shengli Oilfield is developing. In order to meet the demands of fine potential tapping in the high-water cut reservoirs,reservoir structure, low-order fault description and remaining oil distribution description were growing in recent years. Strata subdivision recombination,infilling adjustment,improving the injection sys- tem and others improved the water flooding results. The problems constraining the oil recovery in entire structure,complex fault block and low permeability oil reservoirs were analyzed. Then fine adjustments of water flooding in different oil reservoirs are put forward. At the late stage of high water cut in onshore oil reservoirs,strata subdivision-recombination,infilling well arrangement, single layer production with horizontal well ,water quality improvement and injecting to production well ratio adjustment should be imple- mented. Based on the well pattern optimization,domprehensive application of technology should be used to control and transform the reservoir. Fine and effective water injection should be used to improve the relevance and effectiveness of injection system. And the uniform displacement profile should be explored.