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安塞油田是我国陆上开发最早的特低渗透油田,开发进入中高含水期。近年来通过油藏工程分析、井网转换、井排距等论证,认为平面水驱优势方向受初始水平最大主应力控制,剩余油在注水井动态裂缝侧向呈不规则条带分布,确立裂缝侧向加密,形成排状注水、侧向驱油的开发模式,合理加密排距为100~140m。在长6油藏进行部署、验证后,效果显著,对油田有效开发具有重要指导意义。
Ansai Oilfield is the earliest ultra-low permeability oilfield developed in China and has been developed into a medium and high water-cut period. In recent years, based on reservoir engineering analysis, well pattern conversion and well spacing, it is considered that the dominant direction of plane waterflooding is controlled by the maximum principal stress at the initial level, and the residual oil distributes irregularly along the dynamic fracture lateral direction of the injection well, Lateral encryption to form a row of water injection, the lateral oil displacement development model, a reasonable encryption spacing of 100 ~ 140m. After the deployment and verification of Chang 6 reservoir, the effect is significant and has important guiding significance for the effective development of the oilfield.