蒙古国宗巴音凹陷三维区下白垩统沉积相
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摘要
蒙古国宗巴音凹陷总体勘探程度及认识程度较低。应用三维地震资料及钻井资料,对宗巴音凹陷三维区下白垩统沉积相特征及分布规律进行了深入研究。结果表明,宗巴音凹陷下白垩统经历了断陷和拗陷2个完整的演化阶段。受区域构造背景影响,研究区查二段、下宗巴音组上段及上宗巴音组主要发育辫状河三角洲沉积,下宗巴音组下段及中段主要发育半深湖—深湖沉积。总体来看,研究区湖盆水体经历了由浅—深—浅的变化过程,相应形成了辫状河三角洲前缘和滨浅湖、半深湖—深湖、辫状河三角洲前缘以及滨浅湖的相序组合,物源主要为西部的宗巴音低凸起。辫状河三角洲前缘亚相为该区有利沉积相带;宗巴音构造及宗巴音东构造为有利的勘探区带。
Due to lack of sufficient data previous research mostly studied the petroleum geology character with limited 2D seismic data and logging data, so, the understanding is limited. On the basis of former understanding, and combined the 3D seismic data with core,well logging and logging data of new wells, we deeply studied the sedimentary facies and rules of distribution of down-Cretaceous in Zuunbyan sub-basin 3D work area, the author thought that, in the period of down-Cretaceous deposition, under the control of adjacent structure, the lake basin water body of study area went through shallow to deep to shallow, and relevantly formed phase sequence from stream delta front, shallow to semi-deep and deep lacustrine to delta front. Source of favorable sediments are mainly from west hog of Zuunbyan sub-basin.
Due to lack of sufficient data previous research mostly studied the petroleum geology character with limited 2D seismic data and logging data, so, the understanding is limited. On the basis of former understanding, and combined the 3D seismic data with core,well logging and logging data of new wells, we deeply studied the sedimentary facies and rules of distribution of down-Cretaceous in Zuunbyan sub-basin 3D work area, the author thought that, in the period of down-Cretaceous deposition, under the control of adjacent structure, the lake basin water body of study area went through shallow to deep to shallow, and relevantly formed phase sequence from stream delta front, shallow to semi-deep and deep lacustrine to delta front. Source of favorable sediments are mainly from west hog of Zuunbyan sub-basin.
引文
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[2]刘传鹏,查明,李晓清,等.蒙古国东戈壁盆地宗巴音凹陷油气资源评价[J].油气地质与采收率,2009,16(1):38-40.
[3]赵玉华,李晓清,程有义.蒙古国戈壁盆地群地质特征及含油气性[J].沉积与特提斯地质,2003,23(3):102-105.
[4]Prost G L.Tectonics and hydrocarbon systems of the East Gobiba sin,Mongolia[J].AAPG Bulletin,2004,88(4):483-513.
[5]Johnson C L,Greene T J,Zinniker D A,et al.Geochemical char acteristics and correlation of oil and nonmarine source rocks from Mongolia[J].AAPG Bulletin,2003,87(5):817-846.
[6]王伟,张欣,张丽艳.蒙古国宗巴音油田查干组沉积相研究[J].天然气勘探与开发,2010,33(3):1-4,9.
[7]王春田.东戈壁盆地宗巴音凹陷构造研究[D].青岛:中国海洋大学,2003.
[8]朱本华,赵玉华,彭波.宗巴音凹陷地层特征[J].黑龙江科技信息,2008,2(9):137-138.
[9]冯增昭.沉积岩石学[M].北京:石油工业出版社,1993.
[10]赵澄林,祝玉衡,季汉成,等.二连盆地储层沉积学[M].北京:石油工业出版社,1996.
[11]姜本勇.蒙古国查干油田基本石油地质特征[J].油气地质与采收率,2010,17(2):45-47.
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