柴达木盆地西南缘乌南地区新近系下油砂山组沉积特征研究  

THE RESEARCH OF SEDIMENTARY CHARACTERISTICS IN THE LOWER YOUSHASHAN FORMATION,NEOGENE OF WUNAN AREA,SOUTHWESTERN QAIDAM BASIN

作　　者：杨剑萍[1,2] 张琳璞[3] 石勇[4] 

机构地区：[1]中国石油大学(北京)博士后流动站 [2]中国石油大学(华东),山东东营257061 [3]中国石油大学(华东) [4]中石油青海油田分公司采油二厂

出　　处：《新疆地质》2008年第2期167-171,共5页Xinjiang Geology

摘　　要：利用钻井取心、薄片鉴定、粒度分析及测井解释等资料和手段,对乌南地区新近系下油砂山组沉积特征进行研究.乌南地区下油砂山组共分为5个油层组.一、二油组为洪水-漫湖重力流沉积体系,主要发育洪水-漫湖相,洪水-漫湖相划分为漫湖亚相、沟道亚相及滩砂亚相;三、四、五油组为浅水湖泊-三角洲沉积体系,主要发育浅水湖泊型三角洲相.研究区内浅水湖泊型三角洲相主要划分为三角洲平原及三角洲前缘2个亚相.通过对各沉积相、亚相及微相的研究,认清沉积相演化特点及砂体微相分布规律,对砂体预测及储量估计具有指导意义.The Paleogene sedimentary characteristics from the lower Youshashan formation, Neogene of Wunan area have been studied by core observation, thin section identification, grain size analysis and log interpretation.The lower Youshashan formation of Wunan area can be divided into five formations. The first and second formations belong to flooded-lake gravity currents depositional system, mainly develop flooded-lake facies, and it is divided into lake subfacies, channel subfacies and sands subfacies. The third, forth and fifth formations is shadow lake-deltaic depositional system, mainly develop shadow lake delta facies. In the region of interest, shadow lake delta facies develops both delta plain and delta front facies. Through researched sedimentary facies, sub-facies and micro-facies, summarized the characteristic, recognized the evolution feature of sedimentary facies and sandbody distribution rules, it possesses guiding sense to the sandbody prediction and the calculation of reserves in the future.

关 键 词：柴达木盆地 下油砂山组 洪水漫湖 浅水湖泊型三角洲 

分 类 号：P618.13[天文地球—矿床学]