吴起油田长8沉积相特征及其控油规律  

Sedimentary facies of Member 8 oil-bearing unit of the Triassic Yanchang Formation and its controlling rule on oil distribution in the wuqi Oilfield,Ordos Basin

作　　者：李广涛[1] 许强[2] 陈明奇[1] 

机构地区：[1]西安石油大学油气资源学院,陕西西安710065 [2]延长石油集团吴起采油厂

出　　处：《内蒙古石油化工》2008年第23期128-130,共3页Inner Mongolia Petrochemical Industry

摘　　要：吴起油田长8油层组储层岩石以细粒长石砂岩沉积为主。根据对研究区岩性、沉积结构与构造、垂向序列、测井曲线特征及沉积环境的成因标志综合分析,认为吴起油田长8主要为深湖相的三角洲前缘亚相沉积,砂体以三角洲前缘水下分流河道沉积为主,主要有水下分流河道、分流间湾2种微相类型。该区沉积微相对油水分布具有明显的控制作用,但并非唯一的控制因素。The oil--bearing strata in the Wuqi Oilfield, Ordos Basin, belonging to the Upper Triassic Yangchang Formation,are mainly composed of fine grain feldspar--porphyry sandstones. According to the analyses of lithologic character, sedimentary texture and structure, vertical series, the characteristic of logs and the origin character of depositional environments show that the sand bodies of the Chang 8 oil-- bearing unit are mainly delta front subfacies of lake facies including distributary channel deposit and distributary estuary deposit. The sedimentary facies and structure in the study area have significant effects on oil and gas distribution and production,but it is. not the unique effects.

关 键 词：鄂尔多斯盆地 吴起油田 延长组 沉积相 油气分布 

分 类 号：P618.130.2[天文地球—矿床学] P512.2[天文地球—地质学]