学术
吐鲁番坳陷中-下侏罗统沉积体系再认识
姚丽景[1] 于炳松[1] 樊太亮[2] 董洪奎[1] 郭刚[2]
[1]中国地质大学地质过程与矿产资源国家重点实验室,北京100083 [2]中国地质大学能源学院,北京100083
摘 要:
吐哈盆地是新疆3大含油气盆地之一，是我国目前已知的，唯一南侏罗系煤成烃形成大规模油气聚积的盆地。为了正确认识吐鲁番坳陷中-下侏罗统的沉积体系，以便更好地指导岩性地层油气藏的勘探，本文通过详细的露头剖面观察和钻井岩心、测井分析，对吐鲁番坳陷中-下侏罗统的沉积相进行了重新认识，结果发现，其沉积相类型除了已被普遍认识的辫状河-辫状河三角洲-滨浅湖沉积体系、冲积扇-扇三角洲-浅湖沉积体系以外，还存在典型的曲流河-曲流河三角洲-滨浅湖沉积体系。在沉积相纵向演化和横向对比研究的基础上，指出吐鲁番坳陷中-下侏罗统从八道湾组以辫状河-辫状河三角洲沉积体系为主，向上至西山窑组和三间房组演化为以曲流河-曲流河三角洲沉积体系为主，至顶部七克台组则发育以滨浅湖沉积体系为主，纵向上构成一个明显的基准面上升的退积序列；南北坡沉积体系的构成具有较大差异，南坡以发育辫状河三角洲、曲流河三角洲为特征，北坡则以发育辫状河三角洲、扇三角洲为特征。在此基础上，建立了吐鲁番坳陷中-下侏罗统的沉积模式。[著者文摘]
文章出处:
《现代地质》-2007年21卷2期 -397-405页
分 类 号:
文献标识码:
A
文章编号:
1000-8527（2007）02-0397-09
Sedimentary System Rerecognition of Mid-Lower Jurassic in Turpan Depression
YAO Li-jing , YU Bing-song , FAN Tai-liang, DONG Hong-kui , GUO Gang （ 1. State Key Laboratory of Geological Processes and Mineral Resources, China University of Geosciences, Beijing 100083, China; 2. School of Energy Resources, China University of Geosciences, Beijing 100083, China）
Abstract:
Turpan-Hami basin is one of the three biggest oil and petroleum sources in XinJiang Province, which is the first Jurassic coal measures-related oil basin in China. The sedimentary systems of Mid-Lower Jurassic in Turpan depression were rerecognized through the analyses of outcrop sections, cores and loggings to direct the prospecting for oil-gas effectively. The result shows that there are also meandering river-meandering delta-lacustrine systems except for braided river-braided delta-lacustrine and alluvial fan-fan delta-lacustrine sedimentary systems which have been realized before. On the basis of research on depositional evolution in time and distribution in space, it suggests that in Turpan depression braided river-braided river delta systems were common in Badaowan Formation, meandering river-meandering delta systems are predominant upward in Xishanyao and Sanjianfang formations, and the lacuatrine facies are widespread developed to the top of the research strata in Qiketai Formation, which shows an obviously retrogradational sequence. There were great differences between south and north of the depressions. On the south, it is characteristic as braided and meandering deltas, while on the north it is characteristic as braided delta and fan delta. Finally, a sedimentary model is constructed for the Mid-Lower Jurassic in Turpan depression.[著者文摘]
Key words:
sedimentary system ; sedimentary model ; Mid-Lower Jurassic ; Turpan depression
基金资助:
国家自然科学基金项目（40472064.40672079） 国家“973”项目（2005CB422103,2006CB202302）.
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