Research on the Depositional Environment and Resources Potential of the Oil Shale in the Chang 7 Member,Triassic Yanchang Formation in the Ordos Basin

摘要: The Chang 7 member of the Triassic Yanchang Formation in Ordos Basin contains wealthy oil shale resources.It is mostly distributed southern part basin and thickness these layers from 15 to 30 meters(with thickest exceeds 40 meters) with 5% 10% yield.The development reached its culmination sedimentary period lake was largest area during epoch.Based on research relationship between distribution character facies epoch,we suggest that remarkably controlled by depositional environment then.The formed under deep half are higher yield thicker wider range.The very rich resource volume resources 10 476×10~8t.Moreover,because structure simple,their exploitation conditions good.So potential for prospecting exploitation.