层序地层学在秦南凹陷东南斜坡隐蔽油气藏勘探中的应用
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摘要
探讨隐蔽油气藏在层序格架内的展布规律及预测方法。在层序地层学理论指导下,综合运用钻井、测井以及地震资料,对渤海秦南凹陷东南斜坡区古近系东营组层序地层特征进行了精细研究,把东营组划分为3个Ⅲ级层序:东三、东二和东一层序,并建立东三层序的沉积模型,总结了隐蔽油气藏成藏模式。研究结果表明:在东三层序晚期水体下降,物源供给充足,储层十分发育并且分布范围广,与东二层序稳定分布的泥岩相配合可形成大规模的地层油气藏;早期水体逐渐上升,可形成超覆尖灭岩性油气藏。东二层序厚层泥岩之下,受湖平面变化控制的砂体展布特征和油气输导条件是隐蔽油气藏的成藏主控因素。秦南凹陷隐蔽油气藏勘探潜力巨大。
This paper discusses the distribution laws and prediction methods of the subtle oil and gas reservoir in a sequence framework.Guided by the sequence stratigraphic theories,this paper studies the sequence stratigraphy features of Paleogene Dongying Formation in the southeast slope of the Qinnan depression in Bohai Bay in detail by using well drilling,logging and seismic data.Dongying Formation is divided into 3third-order sequences,that is Sequence Dong 3,Sequence Dong 2andSequence Dong 1.The depositional model of Sequence Dong 3is constructed and the petroleum accumulation model of the subtle oil and gas reservoir is concluded.The research results show that in the late period of Sequence Dong 3reservoir well developed and widely distributed with water level falling and the abundant material supplying,which can form a large-scale formation reservoir combined with the stable distribution of mudstone in Sequence Dong 2.In the early stage,the water gradually rises and an overlap pinch-out lithologic reservoir can be formed.Below the thick mudstone of Sequence Dong 2,the main controlling factors of the petroleum accumulation for the subtle oil and gas reservoir are the sand distribution characteristics controlled by the change of lake level.The exploration potential is great in subtle reservoirs of the Qinnan depression.
引文
[1]Haq B U,Hardenbol J,Vai1P R.Chronology of fluctuating sea levels since the Triassic[J].Science,1987,235:1156-1167.
    [2]Vail P R.Seismic stratigraphy interpretation using sequence stratigraphy,Part 1:Seismic stratigraphy interpretation procedure[J].American Association of Petroleum Geologists,Studies in Geology,1987,27:1-10.
    [3]侯明才,陈洪德,田景春.层序地层学的研究进展[J].矿物岩石,2001,21(3):128-134.Hou M C,Chen H D,Tian J C.The progress of sequence stratigraphy[J].Journal of Mineralogy and Petrology,2001,21(3):128-134.(In Chinese)
    [4]罗立民.河湖沉积体系三维高分辨率层序地层学[M].北京:地质出版社,1999.Luo L M.River and Lake Sedimentary System of 3D High Resolution Sequence Stratigraphy[M].Beijing:Geological Publishing House,1999.(In Chinese)
    [5]Cross T A.High-resolution stratigraphic correlation from the perspective of base-level cycles and sediment accommodation[C]//Precedings of Northwestern European Sequence Stratigraphy Congree.1994:105-123.
    [6]郑荣才,吴朝容,叶茂才.浅谈陆相盆地高分辨率层序地层研究思路[J].成都理工学院学报,2000,27(3):241-244.Zheng R C,Wu C Z,Ye M C.Research thinking of high-resolution sequence stratigraphy about a terrigenous basin[J].Journal of Chengdu Institute of Technology,2000,27(3):241-244.(In Chinese)
    [7]肖传桃,刘莉,陈志勇.层序地层学的研究状况及有关理论问题探讨[J].石油天然气学报,2006,28(6):1-7.Xiao C T,Liu L,Chen Z Y.Current situation of sequence stratigraphy and discussion on related theoretic problems[J].Journal of Oil and Gas Technology,2006,28(6):1-7.(In Chinese)
    [8]贾承造,赵文智,邹才能,等.岩性地层油气藏勘探研究的两项核心技术[J].石油勘探与开发,2004,31(3):3-9.Jia C Z,Zhao W Z,Z C N,et al.Two key technologies about exploration of stratigraphic/lithological reservoirs[J].Petroleum Exploration and Development,2004,31(3):3-9.(In Chinese)
    [9]项华,徐长贵.渤海海域古近系隐蔽油气藏层序地层学特征[J].石油学报,2006,27(2):11-15.Xiang H,Xu C G.Sequence stratigraphic characteristics of subtle oil-gas pool in the Paleogene of Bohai Sea area[J].Acta Petrolei Sinica,2006,27(2):11-15.(In Chinese)
    [10]郭永华,周心怀,李建平,等.渤中凹陷北部QHD34-4-1井钻探的油气地质意义[J].中国海上油气,2008,20(6):367-378.Guo Y H,Zhou X H,Li J P,et al.Oil and gas geology of drilling well QHD34-4-1in the northern Bozhong sag,Bohai Sea[J].China Offshore Oil and Gas,2008,20(6):367-378.(In Chinese)
    [11]赖维成,徐长贵,王晓刚,等.秦南凹陷古近系层序地层和沉积体系研究及油气勘探方向探讨[J].中国海上油气,2007,19(5):300-305.Lai W C,Xu C G,Wang X G,et al.A study on Paleogene sequence stratigraphy and sedimentary systems and a discussion on hydrocarbon exploration directions in Qinnan depression[J].China Offshore Oil and Gas,2007,19(5):300-305.(In Chinese)
    [12]魏泽典.渤中凹陷古近系层序地层与隐藏圈闭有利勘探区带预测[D].北京:中国地质大学,2006.Wei Z D.Sequence stratigraphic and the prediction of the favourable exploration targets of subtle oil-gas pool in Bozhong sag[D].Beijing:China University of Geosciences,2006.(In Chinese)
    [13]徐长贵,周心怀,杨波,等.渤中凹陷石南陡坡带构造-岩性复合圈闭的形成及分布规律[J].现代地质,2009,23(5):887-893.Xu C G,Zhou X H,Yang B,et al.Froming and distribution regularity of the structural-lithologic composite traps in the Shinan slope zone,Bozhong sag[J].Geoscience,2009,23(5):887-893.(In Chinese)
    [14]关达,付强.地震解释技术新进展[J].勘探地球物理进展,2003,26(5/6):367-373.Guan D,Fu Q.Advances in seismic interpretation[J].Progress in Exploration Geophysics,2003,26(5/6):367-373.(In Chinese)

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