砂砾岩储层物性演化及影响因素研究

我国东部断陷盆地陡坡带中砂砾岩储层的勘探与开发越来越受到重视，但其储层物性演化及影响 因素研究相对薄弱。 以东营凹陷北部陡坡带古近系砂砾岩为研究对象，将 22 口取心井的物性数据按深 度从浅至深排列起来，得到了孔隙度演化曲线。 结合岩石薄片、地层水、物性分析及粒度分析等资料，从 成岩与沉积作用 2 方面对地层水矿化度、碳酸盐含量、粒径及分选性等影响砂砾岩孔隙发育的因素进行 了分析，得出胶结和溶蚀作用在垂向上均具有明显的分带性，并受地层水性质的影响和控制的结论，进而 建立了该带砂砾岩垂向物性演化模型，为预测油气有利储层及判断成岩环境均提供了依据。

Physical property evolution of glutenite reservoir and its influencing factors: A case study from northern steep slope zone in Dongying Sag

The exploration and development of glutenite reservoir in the steep slope zone of fault basin in eastern China becomes more and more important, but the studies on the physical property evolution and influencing factors are relatively weak, which restricts the further exploration of oil and gas. Taking Paleogene glutenite in northern steep slope zone of Dongying Sag as an example, this paper used physical property data from 22 cored wells to obtain the evolution curve of porosity. Based on the data of thin slice, formation water, physical properties and grading analysis,the influencing factors such as formation water salinity, carbonate content, grain diameter and sorting coefficient etc, were analyzed from the aspects of diagenesis and sedimentation, which affects pore evolution of glutenite reservoir. It is found that cementation and dissolution are different in vertical zone, and the features of pore evolution are mainly affected and controlled by the character of formation water. The model of physical property evolution of glutenite in vertical was established. The result is very important for forecasting favorable reservoir and judging diagenetic environment.