东营凹陷北部陡坡带沙河街组四段砂砾岩成岩作用  

Glutenite diagenesis in the fourth member of Shahejie formation in the north slope of Dongying depression

作　　者：万欢[1] 黄文辉[1] 王华军[1] 

机构地区：[1]中国地质大学,北京100083

出　　处：《特种油气藏》2012年第3期39-42,152,共4页Special Oil & Gas Reservoirs

基　　金：国家重大专项"油气勘探新领域地层地质与油气评价"(2009ZX05009-005)

摘　　要：在整理已收集资料的基础上,对普通和铸体薄片镜下观察认为:东营凹陷北部陡坡带沙河街组四段岩性主要为砂砾岩,砂岩主要是岩屑长石砂岩、长石岩屑砂岩和长石砂岩,填隙物主要为钙质、硅质胶结物和泥质杂基,结构和成分成熟度较低。成岩作用类型主要有压实作用、胶结作用、交代作用和溶蚀作用,其中前2种作用对储层的孔隙空间破坏很大,而溶蚀作用可以显著地改善储层的储集性能。Based on available data and cast thin section observation,it is found that glutenite is the dominant lithology in the fourth member of Shahejie formation in the north slope of Dongying depression;sandstone mainly includes lithic arkose,feldspathic litharenite and arkose;interstitial materials are mainly calcareous and siliceous cements and muddy matrix;and both texture maturity and compositional maturity are low.The types of diagenesis include compaction,cementation,metasomatism and dissolution,of which the first two types damage reservoir pore space,while dissolution can significantly improve reservoir property.

关 键 词：成岩作用 砂砾岩 沙河街组 北部陡坡带 东营凹陷 

分 类 号：TE122.3[石油与天然气工程—油气勘探]