塔里木盆地古城4井区上寒武统-奥陶系储集层特征  

Upper Cambrian-Ordovician reservoir characteristics in Well Gucheng-4 area,Tarim Basin

作　　者：朱长见[1] 肖中尧[1] 张宝民[2] 金英爱[1] 桑洪[1] 刘永福[1] 党青宁[1] 

机构地区：[1]中国石油塔里木油田公司勘探开发研究院,新疆库尔勒市841000 [2]中国石油勘探开发研究院

出　　处：《石油勘探与开发》2008年第2期175-181,共7页Petroleum Exploration and Development

摘　　要：根据岩心、薄片资料,结合区域地质背景,研究塔里木盆地古城4井区上寒武统—奥陶系沉积相特征和储集层特征,进而指出古城坡折带的勘探潜力和方向。研究表明,古城4井区上寒武统为台地边缘上斜坡垮塌沉积,奥陶系蓬莱坝组、鹰山组和一间房组为台地前缘浅缓坡中低能砂屑滩与灰泥丘相沉积,吐木休克组为台地前缘深水缓坡瘤状灰岩沉积,却尔却克组为斜坡—深水陆棚—超补偿浅水盆地沉积;古城4井上寒武统白云岩受沉积环境、白云岩化和构造裂缝影响,储集层物性较好;而奥陶系灰岩原生孔隙发育差,且多期胶结作用充填了大部分原生孔隙,属于非储集层;古城4井以西、以北地区为中、下奥陶统高能滩体和有利储集层发育的部位。Based on the data of regional geologic background, core and thin section, this paper studies the characteristics of sedimentary facies and reservoirs of the Upper Cambrian-Ordovician in Well Gucheng-4, Tarim Basin, and points out the potential and targets of petroleum exploration in the Gucheng break-slope. Collapsed breccias of platform margins are deposited in the Upper Cambrian, arenite and lime mud mound facies of shallow glacis of platform frontal-margin are deposited in the Ordovician Penglaiba, Yingshan and Yijianfang Formations, knollenkalk of deep-water glacis of platform frontal-margin is deposited in the Ordovician Tumuxiuke Formation, and slope-continental shelf-abyssal basin facies is deposited in the Ordovician Queerqueke Formation. The Upper Cambrian dolomite is a better reservoir which is controlled by deposition environment, dolomitization and structural fractures. The Ordovician limestone reservoir is poor because of most primary pores being filled by cementation. The favorable exploration targets are in the north and west of the Well Gucheng-4 area.

关 键 词：塔里木盆地 古城4井 坡折带 沉积相 储集层特征 

分 类 号：TE121.3[石油与天然气工程—油气勘探]