鄂尔多斯盆地华池地区三叠系延长组长4+5油层组沉积相研究  

Study on sedimentary facies of Chang 4+5 oil unit in Triassic Yanchang formation in Huachi area of Ordos Basin

作　　者：张慧元[1] 李文厚[1] 张慧军[2] 田发国[3] 谭晨曦[1] 

机构地区：[1]大陆动力学国家重点实验室西北大学,陕西西安710069 [2]中油吐哈油田分公司,新疆鄯善838202 [3]中油长庆油田分公司,陕西西安710018

出　　处：《特种油气藏》2010年第2期27-30,共4页Special Oil & Gas Reservoirs

基　　金：国家重点基础研究发展计划(973计划)项目(2003CB214602)部分成果

摘　　要：以露头、岩心、测井曲线为基础,通过对研究区内的岩性特征、测井曲线形态及沉积微相特征进行分析,对该区的沉积特征有了更清楚的认识。认为华池地区延长组长4+5油层组主要由三角洲沉积体系和湖泊沉积体系组成,并进一步分为多种亚相。三角洲沉积体系既有北东向的曲流河三角洲沉积,也有南西向的辫状河三角洲沉积。这将有助于在更深层次上对长4+5油层组的储层特征与展布、油气富集规律、圈闭的成藏机理等问题的认识,为该区油气勘探提供一些依据。This paper studies the sedimentary characteristics through analysis of lithology,logs and sedimentary microfacies based on outcrop,core and well logging data of the study area. It is thought that the Chang 4+5 oil unit of Yanchang formation in Huachi area mainly comprises delta and lacustrine depositional systems which can be further divided into many subfacies. This delta depositional system includes not only NE-trending meandering river delta sedimentation but also SW-trending braided river delta sedimentation. This study deepens the understanding of reservoir characteristics and distribution,hydrocarbon enrichment regularity,and reservoir-forming mechanism in traps,and provides certain guidance for petroleum exploration in this area.

关 键 词：沉积体系 三角洲 湖泊 亚相 沉积微相 华池地区 

分 类 号：TE121.3[石油与天然气工程—油气勘探]