鄂尔多斯盆地姬塬地区三叠系延长组长9油层组沉积体系特征

Sedimentary systems in the Chang-9 oil measures of the Triassic Yanchang Formation in the Jiyuan region,Ordos Basin

摘要: 对姬塬地区三叠统延长组长9油层组沉积体系的类型及特征进行了系统的研究:姬塬地区延长组长9油层组为辫状河三角洲平原沉积,包括分流河道、决口扇、天然堤等微相。详细研究了长91、长92沉积相平面展布特征,建立了研究区辫状河三角洲的沉积模式。

Abstract: The present paper deals,in detail,with the types and characteristics of the sedimentary systems in the Chang-9 oil measures of the Triassic Yanchang Formation in the Jiyuan region,Ordos Basin on the basis of cores and well logs.The Chang-9 oil measures in the Triassic Yanchang Formation is assigned to the braided delta plain deposits,including the distributary channel,crevasse splay and natural levee microfacies.The sedimentary model is proposed for the braided delta deposits in this paper.