玉门油田老君庙构造带白杨河组层序地层及沉积体系特征

doi:10.11743/ogg20150312

摘要/Abstract

摘要：

为揭示老君庙构造带白杨河组层序地层特征及沉积体系分布规律，应用层序地层学及沉积学理论和方法，综合利用大量岩心、钻井、测井、地震及邻区露头资料，建立了酒西盆地老君庙构造带白杨河组层序地层格架，确定了研究区沉积相类型及分布特征，明确了其演化规律及控制因素。研究结果表明，老君庙构造带古近系白杨河组可划分为一个完整的三级层序，其内部可以细分为7个准层序组。在层序内识别出冲积扇、辫状河、辫状河三角洲及湖泊等沉积相。明确了沉积相的分布规律，垂向上形成由冲积扇到辫状河三角洲，再到湖泛泥岩，最后是三角洲的沉积体系;平面上呈近南东-北西向上展布的沉积体系，整体构成一个水进、水退的沉积序列。古地貌影响了三级层序低位域沉积物的展布特征，气候不仅影响了沉积物类型，且和湖平面变化共同控制了沉积物的叠置样式及演化规律。

关键词: 白杨河组, 层序地层, 沉积体系, 老君庙构造带, 玉门油田, 酒西盆地

Abstract:

Sequence-stratigraphic and sedimentologic theories and methods were employed in the study of sequence stratigraphic features and sedimentary system distributions in the Baiyanghe Formaiton of the Laojunmiao structural belt in Yumen oilfield, Jiuxi Basin, northwestern China.Data gathered through core and outsrrop observation and analyses, drilling and logging, and sesimic events, were resorted to establish sequence stratigraphic framework, determine the types and distribution of sedimenatry facies, and understand evolution pattern and controlling factors in the Formation.The result shows that the Formation can be described as a complete three-order sequence, which can be divided into 7 quasi-sequence sets.Sedimentary facies including alluvial fans, braided rivers, braided river deltas and lake depostis, were recognized in the sequence.Depositional facies varied vertically from alluvial fans to braided river delta and then to lake flooding mudstone and finally to delta.Horizontally, the facies presents itself as a near southeast-northwest sedimenatry system-a sedimentary sequence of water transgression and regression.Paleogeomorphology controlled the distribution of the sediments of lowstand system tract of the three-order sequence and climate affected the types of sediments and controlled the superimposed style and evolution pattern of the sediment in the Formation.

Key words: Baiyanghe Formation, sequence stratigraphy, depositional system, Laojunmiao structural belt, Yumen oilfield, Jiuxi Basin

中图分类号:

TE122.2

喻宸,吴胜和,杜文博,等. 玉门油田老君庙构造带白杨河组层序地层及沉积体系特征[J]. 石油与天然气地质, 2015, 36(3): 437-446. doi: 10.11743/ogg20150312 Yu Chen,Wu Shenhe,Du Wenbo,et al. Sequence stratigraphy and depositional system of the Baiyanghe Formation in the Laojunmiao structural belt,Yumen oilfield,Jiuxi Basin,Northwest China[J]. Oil & Gas Geology, 2015, 36(3): 437-446. doi: 10.11743/ogg20150312

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