坡折带在鄂尔多斯盆地岩溶储层演化中的意义  

SIGNIFICANCE OF SLOPE BREAK ZONE IN EVOLUTION OF KARST RESERVOIR IN ORDOS BASIN

作　　者：李林涛[1] 庞雄奇[1] 庞宏[1] 石小虎[2] 刘海峰[2] 

机构地区：[1]中国石油大学资源与信息学院 [2]中国石油长庆油田公司勘探开发研究院

出　　处：《天然气工业》2007年第12期65-67,共3页Natural Gas Industry

摘　　要：鄂尔多斯盆地奥陶系顶部风化剥蚀面在本溪期—早中三叠世的演化过程中起伏形态稳定,具有盆地中部高、东部低的构造格局。研究发现,在盆地中部隆起与东部坳陷之间存在着一个陡坡带,可将其归为构造与侵蚀双重作用成因的坡折带。为此,将该盆地岩溶演化过程与坡折带理论相结合,分析了浅埋藏期至深埋藏期岩溶储层发育与其坡折带背景之间的关系。进而指出,坡折带位置是岩溶储层发育的最有利区域。Weathering crust on the top Ordovician in the Ordos Basin kept stable relief during the evolution from the Benxi stage to the early Middle Triassic and was high in the central part but low in the eastern part. A steep slope zone is recognized between the central uplift and the eastern depression and can be classified as a slope break zone resulted from the double action of tectonism and erosion. Therefore, the karst evolution process of the basin is integrated with the slope break zone theories to analyze the relations between the development of karst reservoirs and the background of slope break zone during the shallow burial to deep burial stages. It is proposed that the slope break zone is the most favorable area for the development of karst reservoirs.

关 键 词：鄂尔多斯盆地 坡折带 埋藏期 岩溶 储集层 勘探区 

分 类 号：P642.25[天文地球—工程地质学]