摘要
对系统取心井岩心样品的岩石学研究表明，下奥陶统亮甲山组结晶白云岩中的硅岩并非交代成因，而是后期充填在由怀远运动（亮甲山期末）形成的淋滤孔洞中的充填物，因为在硅岩内，具有明显的沉积特征和孔洞充填特征。以化学方式为主的充填作用，是造成这套白云岩地层储集性变差的主要原因。
Based on the petrological study on core samples, the author discovered that in Yeli and Liangjiashan Formation of Lower Ordovician, there are distinct characteristics of pore-space filled with silicalite which may not result from the replacement, but the materials filling lately the leached pore-space formed by Huaiyuan movement, because the silicalite has obvious sedimentation and pore-spaces filling characters. This kind of filling dominated by chemical depositing is the main reason making the dolomite reservoir poor in quality.
出处
《石油勘探与开发》
EI
CAS
CSCD
北大核心
1996年第4期39-41,共3页
Petroleum Exploration and Development
关键词
华北地台
早古生代
岩溶作用
硅质岩
成因
Huabei platform, Early paleozoic era, Karstification, Silica rock, Origin
