新疆吐哈盆地鲁克沁地区二叠系梧桐沟组沉积特征及沉积模式  

Sedimentary characteristics and models of the Permian Wutonggou Formation in Lükqün area,Turpan-Hami Basin,Xinjiang

作　　者：司学强 李亚哲 王少霞 窦洋 Si Xue-Qiang;Li Ya-Zhe;Wang Shao-Xia;Dou Yang(PetroChina Hangzhou Research Institute of Geology,Hangzhou 310023,Zhejiang;Research Institute of Exploration&Development,PetroChina Turpan-Hami Oilfield Company,Hami 839009,Xinjiang)

机构地区：[1]中国石油杭州地质研究院,浙江杭州310023 [2]中国石油吐哈油田分公司勘探开发研究院,新疆哈密839009

出　　处：《古地理学报》2018年第5期803-814,共12页Journal of Palaeogeography：Chinese Edition

基　　金：国家"十三五"科技重大专项(编号:2017ZX05001-002);中国石油天然气股份有限公司重大科技专项(编号:2012E-34-06)联合资助~~

摘　　要：在岩心观察的基础上,结合录井及多种分析化验资料,对吐哈盆地鲁克沁地区二叠系梧桐沟组沉积相标志、物源方向、沉积相展布及沉积模式进行研究。结果表明,梧桐沟组沉积时期,鲁克沁地区湖盆经历了由断陷湖盆向坳陷湖盆转换的过程。梧桐沟组一段沉积时期,研究区东西两侧发育水下扇沉积,扇中水道形成多期叠置的厚层泥质砂砾岩沉积,砂砾岩分布面积大,物性较差。梧桐沟组二段和三段沉积时期,湖盆水体变浅,湖岸坡度变缓,研究区东西两侧发育扇三角洲沉积,前缘水下分流河道形成了几套厚10~15 m的砂砾岩沉积,分选性好于水下扇形成的砂砾岩,物性相对较好。相比较而言,扇三角前缘水下分流河道砂体和水下扇砂体顶部的含砾砂岩是较好的储集体。该研究成果将对鲁克沁稠油聚集带储集层预测及区带优选具有指导意义。Using core observation,logging data and various analytical data,the provenance direction,sedimentary facies and models of the Permian Wutonggou Formation in Lükqün area of Turpan-Hami Basin were documented.Results from the current research suggest that the Wutonggou Formation of the Turpan-Hami Basin experienced the depositional change from the rift lake basin to depression-lacustrine basin.Subaqueous fans are developed on both sides of the study area during the first stage of the Wutonggou Formation.The multi-stage superimposed thick muddy conglomerate formed in the channel of the subaqueous fans.The regionally extensive glutenite has poor physical property.The water body of the lake basin became shallow at the end of the stage of the Wutonggou Formation,and the slope of the lake shore became gentler.Fan delta deposits were developed in the study area.The subaqueous distributary channels on fan delta fronts were filled by a few sets of glutenite of about 10-15￣￣m.The sorting degree of glutenite in this period is better than that of the submarine fan,with good physical properties.The subaqueous distributary channel sand bodies in the fan delta fronts and the pebbly sandstone at the top of each submarine fan sand body represent good reservoirs.

关 键 词：吐哈盆地 梧桐沟组 扇三角洲 水下扇 沉积相 

分 类 号：P534.612[天文地球—古生物学与地层学]