【摘要】 柴达木盆地东部经历了多期次构造运动,形成了多个不整合。在测井曲线分析的基础上,以不整合的成因机制及地震反射特征为基础,将柴达木盆地东部地区不整合划分为褶皱、断褶、削截、超覆和平行5种类型。风化剥蚀程度的不均一性使不整合具有典型的层状结构,将不整合面上、下划分为底砾岩、风化黏土层和半风化淋滤带。构造运动、地势的高低与剥蚀量的大小决定了不整合类型在平面上的分布具有区带性,不同类型的不整合具有不同的控油机制,而不同的不整合剖面类型形成不同的油气成藏模式,其中断褶不整合和褶皱不整合是最有利的控油不整合。更多还原

【Abstract】 Qaidam Basin has undergone many tectonic movements and formed several unconformities.According to the hydrocarbon accumulation of unconformities and their origins and seismic reflection characteristics,the unconformities of East Qaidam Basin can be divided into five kinds:fold unconformity,fault-fold unconformity,truncation unconformity,onlap unconformity and parallel unconformity.The zonal distribution law of unconformity type is decided by the tectonic movements,sea level elevation and denudation.Laminar textures due to uneven weathering and denudation processes are typical of unconformities,and the unconformity surfaces in vertices are divided into three parts including basal conglomerate,weathering clay stone and semi-weathering leached zone.The different types of unconformity show different hydrocarbon accumulation mechanism and hydrocarbon patterns.The fold unconformity and fault-fold unconformity are of most favorable types for hydrocarbon accumulation.更多还原