塔里木盆地顺9井区柯坪塔格组下段沉积微相与储层展布  

The Microfacies and Reservoir Distribution of the Lower Member of Kepingtage Formation in Shun 9 Well Area in Tarim Basin

作　　者：孙乃泉[1,2] 云露 蒲仁海[1] 杨素举 

机构地区：[1]西北大学大陆动力学国家重点实验室/地质学系,西安710069 [2]长安大学地质工程与测绘学院,西安710054 [3]中石化西北油田分公司研究院,乌鲁木齐830011

出　　处：《吉林大学学报（地球科学版）》2013年第6期1716-1725,共10页Journal of Jilin University：Earth Science Edition

基　　金：国家科技重大专项项目(2008ZX05001-003);中石化西北油田分公司勘探开发研究院协作项目(KY2011-S-036)

摘　　要：近期在塔里木盆地顺托果勒地区顺9井发现了下志留统柯坪塔格组下段原生油藏。通过岩心、测井和三维地震综合解释认为:柯坪塔格组下段沉积期间,顺托果勒地区经历了半深海-浅海-三角洲沉积过程,油层砂岩属于柯坪塔格组下段上部的由北向南的三角洲河口坝与分流河道沉积。南部附近的塔中隆起虽然距顺9井较近,但并未提供陆源碎屑物质。由于后期构造南抬北降,所以油藏区现今构造属于北倾缓坡背景,其上局部发育低幅度构造。圈闭类型主要为三角洲砂体岩性圈闭,其次为低幅度构造圈闭和岩性构造复合圈闭。有利圈闭区位于三角洲前缘主砂体发育带和局部构造圈闭叠合区。In the Shun 9 well area an oringinal oil pool has been found in the Lower Member of Kepingtage Formation in Shuntuoguole region in Tarim basin. The sedimentary environment is analyzed that is from bathyal to shallow sea to delta, based on integrated interpretation of core, log and seismic data. The sandstone reservoirs are considered to be delta frontal channel mouth bar and distributary channel sand bodies form north to south, in the upper part in the Lower Member of Kepingtage Formation. Tazhong uplift that is closer to Shun 9 well area does not provide terrigenous clastic masses. But during the late deposition of Lower Member of Kepingtage Formation the environment transformed gradually into deltaic and tidal flat. Due to the late tectonic north-dip tilting, the present structure background of oil field belongs to an north dipping slope developed locally low amplitude structures. The founded types of oil pools are dominated by lithological traps associated delta sand body upward pinchout, with partial low amplitude structure traps and lithologie-structural compound traps. Favorable traps are located in the delta front and some structural highs.

关 键 词：原生油藏 岩性-构造圈闭 沉积体系 柯坪塔格组下段 储层预测 

分 类 号：P618.13[天文地球—矿床学]