A区块单砂体剩余油赋存特征及挖潜技术应用

Occurrence characteristics of remaining oil in single sand body of block A and application of tapping potential technology

由于不同沉积环境水动力条件的复杂性,层内非均质性的存在,渗透性的差异,导致在单砂体内部水驱不均匀,容易形成剩余油的富集。而高含水阶段剩余油仍然富集于主力厚油层内。本文在精细刻画单砂体内部“建筑结构”基础上,根据不同单砂体剩余油赋存特征,采取单砂体注采结构优化重组技术,提高单砂体的水驱控制程度,从而增加可采储量,提高采收率。

Because of the complexity of hydrodynamic conditions in different sedimentary environments,the heterogeneity and the difference of permeability,the water flooding in single sand body is not uniform,and it is easy to form the remaining oil enrichment.However,the remaining oil in high water cut stage is still enriched in the main thick oil layer.Based on the detailed description of the internal structure of single sand body and the characteristics of remaining oil in different single sand bodies,this paper adopts the technology of optimizing and recombining the injection-production structure of single sand body to further improve the water drive control degree of single sand body,thus increases the recoverable reserves,enhances the recovery factor.