成都理工大学学报（自然科学版）2016，Vol.43Issue(2)：233-240,8.DOI:10.3969/j.issn.1671-9727.2016.02.10
鄂尔多斯盆地西缘克里摩里组古喀斯特洞穴特征及发育控制因素
Characteristics and controlling factors of paleokarst caves in Kelimoli Formation,west Ordos Basin,China
摘要
Abstract
Paleokarst caves developed in Lower Ordovician Kelimoli Formation in west of Ordos Basin are proved as potential reservoir,but the caves are difficult to predict and the exploration of oil and gas is full of risk.Study of drilling core,thin section,logging and seismic data shows that the caves exist in grain limestone and distribute stably in vertical and horizontal directions.According to characteristics of petrology,logging and seismic data,the caves can be divided into two types, collapse filled and underground river filled caves,and the latter can be further divided into breccia filled and mud filled caves.These caves are dissolved by layer of atmosphere fresh water,and are controlled by lithology,paleogeomorphic and geological conditions.It shows that the grain limestone is the optimal rock,paleokarst slope provides favorable hydrodynamic condition,the fractures of Caledonian period offers seepage channel,and the coverage determines the cave type and cave filling degree.关键词
喀斯特储层/顺层溶蚀/颗粒灰岩/古地貌/溶蚀机理Key words
karst reservoir/corrosion by layer/grain limestone/paleogeomorphic/dissolution mechanism分类
天文与地球科学引用本文复制引用
苏中堂,呼尚才,刘宝宪,任军峰,白海峰..鄂尔多斯盆地西缘克里摩里组古喀斯特洞穴特征及发育控制因素[J].成都理工大学学报（自然科学版）,2016,43(2):233-240,8.基金项目
国家自然科学青年基金项目（41302087）。 （）
