塔里木盆地上泥盆—下石炭统层序地层格架与古地理  

Sequence stratigraphic framework and palaeogeography of the Upper Devonian to Lower Carboniferous in Tarim Basin

作　　者：辛仁臣[1] 贾进华[2] 杨波[1] 

机构地区：[1]中国地质大学(北京)海洋学院,北京100083 [2]中国石油勘探开发研究院,北京100083

出　　处：《古地理学报》2011年第6期665-676,共12页Journal of Palaeogeography：Chinese Edition

基　　金：国家科技重大专项(编号:2008ZX05001)资助

摘　　要：利用110余口钻井的录井和测井资料,结合地震资料,运用沉积学原理和层序地层学原理,建立了塔里木盆地上泥盆—下石炭统层序地层格架。自下而上,塔里木盆地上泥盆—下石炭统发育东河层序(SQd)、巴楚1层序(SQb1)、巴楚2层序(SQb2)、卡拉沙依1层序(SQk1)共4个三级层序,每个层序均可划分出海侵体系域(TST)和高位体系域(HST)。查明了各层序的地层分布和古地理格局,自下而上,各层序的地层分布范围逐层扩展超覆,古地理格局由SQd发育时期的浅海海湾—半岛演化为SQb1和SQb2发育时期的浅海—孤岛,到SQk1发育时期,塔北地区全部沉没于水下,形成广阔的浅海。SQd、SQb1、SQb2地层向"半岛"和"孤岛"超覆,"半岛"和"孤岛"的周缘是有利的地层圈闭发育区带。Based on logging curves and well logging data of 110 drilling wells, combining with seismic data, the sequence stratigraphic framework of the Upper Devonian to Lower Carboniferous was estab- lished in the Tarim Basin using sedimentologic and sequence stratigraphic principles. From bottom to top, 4 third-order sequences were developed from the Upper Devonian to Lower Carboniferous in the Tarim Basin namely as SQd, SQbl, SQb2 and SQkl, and each sequence can be subdivided into transgression systems tract （TST） and high systems tract （HST）. The stratigraphic distribution and palaeogeography framework of each sequence was also studied. From bottom to top, the stratigraphic distribution of each sequence widened and overlapped. The palaeogeography evolved from shallow sea bay-peninsula during the depositional period of SQd to shallow sea-isolated island during the depositional periods of SQbl and SQb2, and the northern Tarim Basin was all sank below the water which led to the formation of a broad shallow sea. Strata of SQd, sula＂ and ＂isolated island＂, and the surrounding areas of the ＂pe during the depositional period of SQkl SQbl and SQb2 overlapped to ＂peninninsula＂ and ＂isolated island＂ are potential zone for the development of stratigraphic traps.

关 键 词：塔里木盆地 上泥盆—下石炭统 层序地层 地层分布 古地理格局 

分 类 号：P539.2[天文地球—古生物学与地层学]