鄂尔多斯盆地东部张台区长6油层组沉积微相特征与控油因素分析  

Study on sedimentary microfacies and oil-controlling factors of Chang-6 reservoirs in Zhangtai area,Eastern Ordos Basin

作　　者：孟选刚[1] 单旭光[1] 代晓旭[1] 李沼[1] 朱海涛[1] 王宝萍[1] 

机构地区：[1]延长油田股份有限公司七里村采油厂,陕西延安717111

出　　处：《西安石油大学学报（自然科学版）》2015年第3期12-17,23,共7页Journal of Xi’an Shiyou University（Natural Science Edition）

基　　金：国家自然科学基金(编号:41102083)

摘　　要：位于鄂尔多斯盆地东部的张台区主要产油层段长6油层组的岩性以浅灰色、灰色细粒长石砂岩为主,夹深灰色、灰黑色泥页岩。通过岩心观察、薄片鉴定、粒度分析和物性分析认为,长6油层组砂岩储层为湖泊三角洲沉积产物,发育三角洲平原和三角洲前缘两大亚相类,有多种微相。油层分布主要受沉积特征控制,水上、水下河道砂体是最主要的含油部位,但同时局部也受其他因素的影响。The lithology of the Chang-6 formation in Zhangtai area,Eastern Ordos Basin,is mainly gray and grayish fine-grained feldspathic sandstones,in which there are interbeds of dark gray mudstone and gray-black shale. According to core observation,slice identification,particle-size analysis and physical property analysis,it is held that the Chang-6 sandstone reservoirs are mainly lacustrine delta deposits,in which two subfacies of delta plain and delta front are developed,and there are a variety of microfacies. The distribution of oil reservoirs is controlled mainly by sedimentary characteristics,and parts are also affected by other factors. The distributary channels of delta plains and the underwater distributary channels of the delta front are main oil-bearing sand-bodies.

关 键 词：沉积微相 油气分布 延长组 张台区 鄂尔多斯盆地 

分 类 号：TE122[石油与天然气工程—油气勘探]