针对超低渗储层分类评价中存在的不足, 引入近几年在储层研究方面发展起来的新技术, 提出了有用孔隙度、主流喉道半径、可动流体饱和度、启动压力梯度4 个超低渗储层分类评价参数,建立了“四元分类标准”。同时对9 个区块进行储层实际分类评价, 评价结果能够有效地反映超低渗透储层的渗流能力及有效储集空间。对油气田开发具有一定的指导意义。

Aimed at the shortage of classification evaluation for extra- low permeability reservoirs, several new techniques developed in reservoir research are introduced in recent years. Four classification evaluation parameters for extra-low permeability reservoir are proposed, including effective porosity, mainstream throat radius, movable fluid saturation and start-up pressure gradient. The reservoir classification evaluations are carried out to nine blocks. The results show that the seepage capacity and effective reservoir space could be effectively reflected. This classification method will be important to guide the oil/ gas field development.