砂砾岩油田上倾尖灭带开发技术对策探讨

砂砾岩油田开发进入到特高含水后期，挖掘油层上倾尖灭带附近的剩余油潜力显得日趋重要起来。上倾尖灭带油层薄、物性差、分布系数低；剩余油分布线长，面窄、厚度小、井网控制程度差；新井投产产能低、稳产期相对较长。因此，必须采用特殊的挖潜方式，对单一油层部署水平井，对叠瓦状油层部署大斜度定向井，对参差不齐的多油层部署多底井，对上倾尖灭带与零散小油砂体的组合部署多靶心井。同时，还要严格执行油层保护措施，采用行之有效的喷砂射孔等技术。

Development Technique for Updip Pinch Out Zone of Glutenite Oilfield

It is important to redevelop the residual oil potential in the updip pinch out zone of reservoirs in glutenite oilfields at ultra-high water cut stage. Updip pinch out zones are characterized by thin oil layers, poor physical properties and low distribution factors. Features of residual oil distribution are long length, narrow width, thin thickness and poor control of well pattern. Wells newly putted into production have the characters of low production capacity and relatively long stable production period. Special ways are needed to redevelop the residual oil potential in updip pinch out zones. Specific well spacing patterns include using horizontal wells in single layer, extended reach wells in imbricated oil layers; multiple wells in uniform multiple layers and multiple bull's-eye wells in layers with small sporadic oil sand bodies in updip pinch out zones. Meanwhile, strict reservoir protection measures should be taken and jetted particle perforation technology should be used.