用油气运移痕迹的统计结果确定仓储层厚度--以东营凹陷为例

在对东营凹陷网毯式油气成藏体系结构进行研究的基础上，针对其中、东部的特殊地质情况，对仓储层进行了精细划分。以钻井油气显示和试油数据为依据，研究了仓储层中的油气运移规律，提出了仓储层厚度的界定方法，并指出厚度是影响仓储质量的关键因素，只有在构成仓储层的砂砾岩体达到一定厚度时才能成为有效仓储层。仓储层厚度越大的地方，越有利于油气的运移和聚集成藏。同时在仓储层中显示油气成藏和有油气运移痕迹所要求的砂砾岩体厚度是相近的，而与无油气运移痕迹的砂砾岩体厚度有明显的差别。并且随着埋藏深度的增加，要求作为仓储层的砂砾岩体厚度也随之增大。因此，可以通过计算仓储层厚度来评价仓储层的质量。该方法在实际应用中简便可行，对于评价类似地区的网毯式油气成藏体系仓储层的仓储质量有借鉴作用。

Determination of storage - layer thickness using the statistical result of the hydrocarbon migration trace-taking Dongying Sag as an example

Based on the research of the structure of meshwork - carpet type oil and gas pool - forming system in Dongying Sag, the storage -layers were divided in detail according to the distinctive geologic condition in east and central area of Dongying Sag. According to the data of drilling oil - gas shows and formation testing,oil - gas migration rule in the storage - layers was studied, the determining method of storage - layer thickness was put forward. It was pointed out that the thickness is the key factor of storage quality, the effective storage - layer can only be formed when the thickness of glutenite body reaches a certain value. The thicker the storage layer, the easier the migration and pool - forming of hydrocarbon. The thickness of glutenite body required for storage layers and hydrocarbon migration trace was close,which was very different from thickness without migration trace. With the burial depth increasing,the thickness of glutenite body as storage layer should be thicker. So the storage - layer quality can be quantita-tive evaluated by its thickness. It is feasible and can be referential to evaluate the storage - layer quality of meshwork - carpet type oil and gas pool - forming system in the same type of the oilfield.