【摘要】 结合前人对鄂尔多斯盆地延长组深水重力流的大量实践和研究,选取鄂尔多斯盆地合水地区为研究区块,通过岩心观察、测井解释成果等资料对该研究区深水重力流沉积类型及特征分小层进行描述。将长7油层组三分,精细剖析了长7油层组各小层岩心资料,总结其重力流沉积特征与规律。结果表明:合水地区长7段重力流沉积类型以砂质碎屑流、似涌浪浊流、准稳态浊流和滑塌沉积为主,各小层略有差异;平面上以"朵体"的形式沿斜坡向研究区中心滑动。利用岩心资料分析了滑动岩体、滑塌沉积、砂质碎屑流沉积和浊流沉积的发育特征,得出了重力流沉积沿搬运方向以滑塌沉积-浊流沉积-砂质碎屑流沉积渐变的分布规律。更多还原

【Abstract】 Based on a large number of previous studies on deep-water gravity flow in Yanchang Formation of Ordos Basin,the sedimentary types and characteristics of deep-water gravity flow in each sublayer of Yanchang Formation in Heshui area of Ordos Basin are described through core observation and log interpretation. Chang 7 reservoir group are divided into three small layers,core data of the small layers are analyzed carefully,and their distribution characteristics and rules are summarized. The results show that in Heshui area,the gravity flow deposits of Chang 7 Member are mainly sandy clastic flow,surge-like turbidity flow,quasi-steady turbidity flow and slump deposits,with slight differences among the small layers. On the plane,they slides along the slope to the center of the study area in the form of " flower-body". The development characteristics of sliding rock mass,slump deposit,sandy clastic flow deposit and turbidity flow deposit are analyzed by using core data,and the gradual distribution of gravity flow deposit along the transport direction of slump deposit-turbidity deposit-sandy clastic flow deposit is obtained.更多还原