延安地区上三叠统长6期沉积特征及其演化  

Sedimentary characteristics and evolution during Upper Triassic Chang 6 stage in Yan'an Area

作　　者：王震[1] 吴汉宁[1] 李英[1] 王靖华[1] 柏冠军[1] 赵希刚[1] 

机构地区：[1]西北大学大陆动力学教育部重点实验室/地质学系,陕西西安710069

出　　处：《煤田地质与勘探》2005年第6期17-20,共4页Coal Geology & Exploration

基　　金：国家"973"基金资助项目(2003CB214600)

摘　　要：通过对川口油田测井曲线和岩心分析,总结了延安地区上三叠统长6期沉积微相特征,建立了长6期岩性和测井曲线的响应模式。再结合分析沉积的演化过程、电性和物性特征、骨架砂体的几何形态和沉积演变,得出该地区沉积相和演化模式。认为从长64到长61期沉积环境为湖泊、三角洲前缘、三角洲平原亚相到河流相。长61、长62是主力储层,其物性最好。According to analysis results of logging curve and cores in Chuankou oilfield, the study area＇ s rock-logging model of Chang 6 is established. Moreover, the sedimentary facies and evolution model are also established through analyzing sedimentary evolution processes, logging and physical characters, the geometry form of sandbody framework. A conclusion is got that the facies of lake, delta front and plain and river appear in turn. The intervals of Chang 61 and Chang 62 are the main oil-bearing intervals and their characters are the best among 4 oil-bearing intervals of Chang 6.

关 键 词：长6油层组 沉积特征 沉积相与演化模式 延安地区 

分 类 号：P512.2[天文地球—地质学]