【摘要】 综合利用岩心、测井及地震等资料,对板桥凹陷A井区沙一段下亚段进行了深入研究。A井区沙一段下亚段砂岩段为湖底扇的重力流沉积,断裂对重力流的发育起到了主控作用。断裂不仅为重力流提供了沉积空间,更重要的是当沉积空间不足以容纳重力流沉积时,它对重力流起到了阻挡作用,使重力流砂体展布方向由北北东向转为北东东向。建立了发育于斜坡且由主控断层控制的重力流沉积模式,该模式将为板桥凹陷隐蔽圈闭油气藏的寻找和评价提供依据。更多还原

【Abstract】 According to the data of drill core,seismic and well logging,the sedimentary characteristics and model of the lower of the first member of Shahejie Formation was researched in A area of Banqiao Depression. The sedimentary facies was gravity flow of sub-lacustrine fan. And gravity flow was mainly controlled by faults, which provided sedimentary space for gravity flow, and blocked the gravity flow when the sedimentary space can’t accommodate the sedimentary deposit. Just because of fault blocking, the sand orientation of gravity flow changed from NNE to NEE. On the base of the analysis,the depositional model of fault-controlling gravity flow has been built. The model can provide useful information for prospecting and evaluating subtle traps.更多还原