准噶尔盆地南缘郝家沟剖面下侏罗统八道湾组辫状河三角洲沉积  

Braidedriver delta deposition of the Badaowan Formation of lower Jurassic in Haojiagou section,southern Junggar Basin

作　　者：李茂榕[1] 周洪瑞[1] 王训练[1] 刘智荣[1] 

机构地区：[1]中国地质大学(北京)地球科学与资源学院

出　　处：《油气地质与采收率》2007年第3期41-45,共5页Petroleum Geology and Recovery Efficiency

基　　金：中国石化集团公司"十五"科技攻关项目"准噶尔盆地腹部及西缘地区圈闭识别与成藏模式研究"(P03011)资助

摘　　要：准噶尔盆地南缘郝家沟剖面下侏罗统八道湾组为一套典型的辫状河三角洲沉积,主要为砾岩、砂岩、细砂岩、粉砂岩和泥岩构成的一套碎屑岩沉积组合。八道湾组辫状河三角洲可以划分为辫状河三角洲平原、辫状河三角洲前缘和前辫状河三角洲3个亚相。进积型沉积序列和退积型沉积序列在八道湾组辫状河三角洲中都有发育,但以退积型沉积序列为主。八道湾组一段和二段构成一个长期基准面旋回SQ1,八道湾组三段与三工河组一段构成另一个长期基准面旋回SQ2。SQ1由3个中期旋回组成,每个中期旋回又由数量不等的短期旋回构成;SQ2可进一步划分为3个中期旋回。The Badaowan Formation of lower Jurassic in Haojiagou section,southern Junggar Basin,is a typical braided-river delta deposition.This section mainly consists of a clastic rock sedimentary association of conglomerate,sandstones,packsands,silts tones and mudstones.The braided-river delta of Badaowan Formation can be divided into three subfacies:braided-river delta plain subfacies,braided-river delta front subfacies and pro-braided-river delta subfacies.Progradational sequence and retrograding sequence both can be found in the braided-river delta deposition,but the retrograding sequence constitutes the majority.Members of No.1 and No.2 in Badaowan Formation make up of a long-term base-level cycle named SQ1,and members of No.3 of Badaowan Formation and No.1 of Sangonghe Formation make up of another long-term base-level cycle named SQ2.SQ1 can be divided into three mid-term cycles and each mid-term cycle can also be divided into different numbers of short-term cycles.SQ2 also can be further divided into three mid-term cycles.

关 键 词：八道湾组 辫状河三角洲 进积型沉积序列 退积型沉积序列 准噶尔盆地 

分 类 号：TE112.21[石油与天然气工程—油气勘探]