东营凹陷滩坝砂体油藏地质特征及压裂优化选层

针对东营凹陷滩坝砂岩油藏由于横向上变化快、单层薄、区域上单砂体连通性差、油气充满程度存在差异等因素导致各井储层改造效果差异较大的问题, 分别从储层含油性、物理性能、厚度、储层流体充满程度4个方面, 并结合压裂改造工艺现状, 分析了压裂效果的影响因素, 认为储层流体充满程度是决定压裂效果的最重要因素, 并建立了地区优化选层的经验图版, 对今后类似的滩坝砂岩储层压裂优化选层有一定的借鉴意义。

The Geological Feature and Fracturing Layer Optimization in Beach-Bar Sandbody Reservoir of Dongying Depression

Due to the severe lateral variation of the reservoir, thin thickness of the layer, poor regional connection of the sandbody and different oil saturation, well stimulation effect varies much in beach-bar sand reservoir of Dongying Depression. Combing current fracturing technology, the authors analyze factors controlling fracturing effects from the following 4 aspects including oil saturation, petrophysical properties, pay zone thickness and reservoir fluid saturation. It indicates that fluid saturation is the most influential factor in fracturing. An empirical chart is established for optimized layer selection, which can be reference for similar beach-bar sandbody reservoirs in fracturing in the future.