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临13沙二下油藏历经30余年的开发调整,目前已进入中后期开发。因构造复杂,断块破碎,储层非均质性严重,历史上水井大段合注,油井大段合采,致使油层平面、纵向水淹程度不均,剩余油高度分散,挖潜难度加大。加之水井套破、管柱卡等原因,造成注采井网二次不完善,稳产基础不牢。本文针对油藏开发中存在的问题,在重建地质模型的基础上,通过井网优化技术,优化注水产液结构,水驱效果明显改善。
Pro 13 Sha 2 reservoir after 30 years of development and adjustment, has now entered the development in the late. Due to the complex structure, the broken blocks and the serious reservoir heterogeneity, a large section of well in the history has been co-injected with a large section of the well to cause uneven horizontal and vertical flooding of the reservoir and high residual oil dispersion, which made it more difficult to tap the potential . Coupled with water wells sets of broken, such as string cards, resulting in injection well pattern is not perfect, stable production base is not strong. In this paper, based on the reconstruction of geological model and the well pattern optimization technology, the waterflooding effect is obviously improved for the existing problems in reservoir development.