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延气2井区块盒8段低孔低渗储层成岩作用特征及其对储层的影响 被引量:2

Diagenetic characteristics and its effect on reservoir of the lower porosity and permeability Sandstones of the 8th member of Shihezi in Yanqi 2 borefild
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摘要 根据常规薄片、铸体薄片、扫描电镜、X衍射等资料分析,对延气2井区块盒8段砂岩储层岩石学特征、成岩作用类型、成岩阶段划分及其对储层的影响进行了研究。结果表明:研究区盒8段储层岩石类型主要为石英砂岩、岩屑石英砂岩。研究区现今成岩作用已普遍进入晚成岩A期阶段,少量进入晚成岩B期阶段的早期。经历的成岩作用有压实作用、胶结作用、交代作用、溶蚀作用、破裂作用。其中,压实作用、胶结作用是主要的破坏性成岩作用,而溶蚀作用、破裂作用是主要的建设性成岩作用。 The data of cast slice, thin sections, scanning electron microscopy and X-diffraction were applied to analyze the petrology, diagenesis, diagenetic stage division and its effect on the reservoir of Yanqi 2 borefild in Ordos Basin. The results show that, the rock types are quartz sandstone, lithic quartz sandstone in the study area of He 8 reservoir. These sandstones have already been in stage A of the later diagenetic stage, a small amount has been in stage B of the later diagenetic stage. They experienced compaction, cementation, metasomatism, dissolution and fracturing. Among them, compaction and cementation are the main destructive diagenesis; dissolution and fracturing are major constructive diagenesis.
出处 《石油化工应用》 CAS 2012年第3期63-65,69,共4页 Petrochemical Industry Application
基金 西北大学研究生科研实验资助项目 项目编号:10DZSY012
关键词 成岩作用 盒8段 鄂尔多斯盆地 低孔低渗 diagenesis He 8 member Ordos basin lower porosity and oermeabilitv
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