鄂尔多斯盆地延113井区山西组沉积微相研究  

Sedimentary microphase study of Shanxi formation in Yan 113 well area,Ordos Basin

作　　者：孙萌思 SUN Mengsi(School of Petroleumn Engineering and Environmental Engineering,Yan'an University,Yan'an Shaanxi 716000,China)

机构地区：[1]延安大学石油工程与环境工程学院,陕西延安716000

出　　处：《石油化工应用》2024年第9期69-73,共5页Petrochemical Industry Application

基　　金：陕西省自然科学基础研究计划项目(2020JQ-798);延安大学博士科研启动项目(YDBK2018-31);大学生创新训练计划(D2023123)。

摘　　要：本文综合应用岩心、测井和分析测试等资料,以鄂尔多斯盆地延113井区山西组为研究对象,总结了岩石学特征、泥岩颜色、粒度分析、沉积层理等相标志特征,开展了延113井区山西组沉积微相类型、特征及沉积相展布规律研究。研究结果表明:研究区整体为三角洲前缘沉积环境,包括水下分流河道和分流间湾两种沉积微相。山2段水下分流河道呈北东-南西向展布,河道宽广,分布范围大。山1段海平面大幅下降,三角洲前缘水下分流河道向南进一步延伸,四条主河道由北往南全区贯通,且河道向南变窄分叉,水下分流河道沉积微相是研究区的主要储集相带。This paper comprehensively applies the data of core,logging and analytical testing,and takes the Shanxi formation in Yan 113 well area of Ordos Basin as the research object,summarizes the petrological characteristics,mudstone color,grain size analysis,sedimentary stratification and other phase signatures,and carries out the research on the type and characteristics of sedimentary microphase and sedimentary phase spreading law of the Shanxi formation in the Yan 113 well area.The results of the study show that the whole study area is a delta front sedimentary environment,including two sedimentary microphases,the underwater diversion channel and the diversion bay. The underwater diversion channel in the Shan 2 section spreads in a north-east-south-west direction, with a wide channel and a large distribution range. As the sea level drops significantly in the Shan 1 section, the underwater diversion channels at the front edge of the delta extend further to the south, and the four main channels are connected from north to south, and the channels narrow and bifurcate to the south, and the underwater diversion channel sedimentary microphase is the main reservoir phase zone in the study area.

关 键 词：沉积微相 水下分流河道 三角洲前缘 相标志 

分 类 号：TE121.3[石油与天然气工程—油气勘探]