成都理工大学学报（自然科学版）Issue(1)：59-67,9.DOI:10.3969/j.issn.1671-9727.2016.01.06
绿泥石环边的再研究--来自镇泾地区延长组砂岩的证据
Further study of chlorite rim in sandstone:evidences from Yanchang Formation in Zhenjing area,Ordos Basin,China
摘要
Abstract
Chlorite rim is the most important occurrence of authigenic chlorite as a common kind of clay cements in sandstone,and it is attracted by peoples’special attention because it always accompanies with the high quality sandstone reservoirs.Aiming at some debates about chlorite rim in the previous researches,this paper studies the sandstone of Chang 9 oil-bearing segment of Triassic Yanchang Formation in the Zhenjing area of Ordos Basin.Through researching casting thin section,scanning electron microscope and porosity-permeability data,this paper discusses such questions again,that is, the forming stage of chlorite rim,the effect of chlorite rim on diagenesis,and the relationship of chlorite rim with the reservoir quality of sandstone.On the basis of the research results,some opinions different from the previous research are acquired and the following conclusions are obtained. 1)The chlorite rim forms at the A-B phase of earlier diagenesis stage.2)The chlorite rim can not enhanced the mechanical strength of rocks and the ability of resisting compaction.3 )The reason of the ability of the chlorite rim preventing the secondary enlargement of quartz is that the pore-water forming the chlorite rim has different pH value and Sr concentration from the pore-water suitable for quartz growing.However,the chlorite rim bears no relationship with the forming of authigenic quartz.4)The chlorite rim can not enhance the reservoir quality of sandstone obviously.However, the appearance of the chlorite rim indicates the abundance of the primary intergranular pore in sandstone.关键词
绿泥石环边/成岩阶段/压实作用/硅质胶结作用/储集性能Key words
chlorite rim/diagenesis stage/compaction/silicious cementation/reservoir quality分类
天文与地球科学引用本文复制引用
向芳,冯钦,张得彦,江凌飞,王誉婉,赵俊兴..绿泥石环边的再研究--来自镇泾地区延长组砂岩的证据[J].成都理工大学学报（自然科学版）,2016,(1):59-67,9.基金项目
国家自然科学基金资助项目（41072083）；油气藏地质及开发工程国家重点实验室（成都理工大学）开放基金资助项目（PLC201307）；成都理工大学中青年骨干教师培养计划资助项目。 （）
