砾岩油藏水驱剩余油分布特征及技术对策

Characteristics of Remaining Oil Distribution in Conglomerate Reservoirs after Water Flooding and Technical Countermeasures

针对准噶尔盆地百口泉油田百21井区砾岩油藏水驱控制程度低、井网极不完善的问题,以油藏工程方法与储层地质学为指导,应用动、静态资料开展储层构型精细研究,分析油藏构造、沉积、储层非均质特征以及油水分布规律,完善注采井网。研究结果表明:文中提出的“层系异策、分区调控、单井分类、方式优化”的注水优化调整思路对百口泉油田十分有效。通过开展百21井区三叠系剩余油分布特征以及油藏注采井网研究,应用流线模拟技术综合分析识别出56个优势渗流通道,提交动用石油地质储量975.00×10^(4)t,累计增油16.60×10^(4)t。该研究对同类油藏的注采井网完善及高效挖潜具有借鉴作用。

In response to the problems of low water flooding control degree in conglomerate reservoirs and extremely imperfect well networks in Wellblock Bai 21,Baikouquan Oilfield in the Junggar Basin,the reservoir engineering method and reservoir geology are used as guidance to conduct fine research on reservoir architecture by applying dynamic and static data,analyze reservoir structure,sedimentation,reservoir in-homogeneous characteristics and oil and water distribution law,and improve the injection-production well patterns.The study results show that The idea of water injection optimization and adjustment“different strategies for different layer systems,adjustment and control by zone,classification by single well,and optimization of method”proposed in the article is very effective for the Baikouquan Oilfield.By carrying out the study on the distribution characteristics of the remaining oil and the reservoir injection and production well patterns in the Triassic system of Wellblock Bai 21,56 dominant seepage channels were identified through comprehensive analysis by applying flowline simulation technology,and the submitted producing petroleum geological reserves were 975.00×10^(4)t,and the accumulated oil increase was 16.60×10^(4)t.This study has a reference effect for the improvement of injection and production well patterns and efficient tapping of similar reservoirs.