网毯式油气成藏体系的仓储层定量评价探讨——以东营凹陷为例

Discussion of quantitative evaluation on the storage layer in meshworkcarpet type oilgas poolforming system—taking Dongying sag as example.

在网毯式油气成藏体系概念指导下 ,研究了东营凹陷网毯式油气成藏体系结构 ,提出了仓储质量系数的概念 ,指出仓储质量系数主要取决于仓储层的厚度、物性参数、断层网质量系数和环境系数。断层网质量系数等于单位仓储层面积供油断层的条数与单位仓储层面积之比 ;环境系数通常与距离生油凹陷的远近及与三角洲前缘砂体的接触程度等外部环境因素有关。通过模拟试验和实际资料研究认为 :仓储质量系数大于或等于 0 .7为好仓储层 ;仓储质量系数大于或等于 0 .3,小于 0 .7为中等仓储层 ;仓储质量系数小于 0 .3,为差仓储层。仓储质量系数越大 。

Guided by the concept of meshworkcarpet type oilgas poolforming system, the meshworkcarpet type oilgas poolforming system structure of Dongying sag is researched. The definition of storage quality coefficient is put forward. It points out that the storage quality coefficient is mainly determined by the storage layer thickness, physical parameters, regmatic network quality coefficient and environment coefficient. The regmatic network quality coefficient equals to the number of oil feeding fault in unit area of the storage layer. The environment coefficient usually relates to some external environment factors, such as the distance to genetic sag and the contact degree to frontal sand body of delta. The simulation experiment and actual data research showed that: the storage layer with storage quality coefficient greater than or equal to 0.7 is good layer; the storage layer with storage quality coefficient greater than or equal to 0.3 and less than 0.7 is medium layer; and the storage layer with storage quality coefficient less than 0.3 is poor layer. The storage quality coefficient of petroleum enrichment area is bigger.