西峰油田庄58区块长8储层特低渗透成因

综合应用测井资料和铸体薄片、扫描电镜、X衍射、粒度、压汞等分析化验资料,对西峰油田庄58区块长8储层的特低渗透成因和主控因素进行了分析。结果表明,特低渗透成因主要受沉积作用和成岩作用的共同影响,主要表现为：沉积微相对储层物性的影响较大,水下分流河道和河口坝明显好于水下分流间湾,而且成分成熟度低和粒度偏细也是造成特低渗的主要因素之一;成岩压实作用和胶结作用使得储层孔隙减小、渗透性变差,而溶蚀作用和少量成岩微裂缝的产生又为储层中油气的附存和渗流、运移提供了有利条件;水下分流河道与河口坝砂体是研究区的主要储层分布相带。

Genesis of extra-low permeability for Chang 8 reservoir of Block Zhuang 58 in Xifeng Oilfield

Based on the synthetical use of well logging data and testing data such as cast slice, scanning electron microscope, X-ray diffraction, grain size and mercury penetration, this paper studied the genesis and main controlling factors of extra-low permeability for Chang 8 reservoir of Block Zhuang 58 in Xifeng Oilfield. The study results show that the genesis of extra-low permeability is mainly affected by sedimentation and diagenesis. The sedimental microfacies had a great influence on the reservoir physical ...