陆相箕状断陷缓坡带层序地层学研究与勘探实践——以埕岛东坡东营组为例
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摘要
济阳坳陷陆相箕状断陷缓坡带地层是逐渐超覆于中生界、古生界潜山上的披覆状沉积。这类沉积在渤海湾下第三系地层中广泛发育,并极大地受古地貌特征的控制。在特定的古地貌条件下,基准面旋回控制下的沉积充填序列及生储盖组合的分析加深了对储层及隐蔽油气藏成藏机理的认识,并对济阳坳陷缓坡带油气勘探具有较大的指导作用。埕岛地区东部斜坡带东营组勘探程度相对较低,进行层序地层学研究、建立其地层格架是油气勘探的重要研究内容。将层序地层学原理应用于陆相断陷盆地缓坡带,并结合沉积发育特征、厘定地层界线、划分地震旋回,建立层序地层序列,有效地指导了济阳坳陷缓坡带油气的勘探。
The gentle slope formation in the continental half graben of the Jiyang depression is a gradual drape deposition overlapping on the Mesozoic and Paleozoic buried hills.Such deposits had widely developed in the lower Tertiary of the Bohai Bay,and are greatly dominated by palaeogeomorphology.Under certain palaeogeomorphic conditions,the analysis of sedimentary filling sequence and source-reservoir-cap assemblage controlled by base level cycles has enhanced the understanding of hydrocarbon accumulation mechanism of the reservoirs and subtle reservoirs,thus guiding oil and gas exploration on the gentle slope of the Jiyang depression.The Dongying formation in the eastern slope of the Chengdao region is relatively less explored,so that performing sequence stratigraphy study and constructing stratigraphic framework are crucial issues for oil and gas exploration.Oil and gas exploration on the gentle slope of the Jiyang depression has been carried out effectively by applying sequence stratigraphy,coupling with deposition characteristics,determining stratigraphic boundary,delineating seismic cycle and establishing stratigraphic sequence.
The gentle slope formation in the continental half graben of the Jiyang depression is a gradual drape deposition overlapping on the Mesozoic and Paleozoic buried hills.Such deposits had widely developed in the lower Tertiary of the Bohai Bay,and are greatly dominated by palaeogeomorphology.Under certain palaeogeomorphic conditions,the analysis of sedimentary filling sequence and source-reservoir-cap assemblage controlled by base level cycles has enhanced the understanding of hydrocarbon accumulation mechanism of the reservoirs and subtle reservoirs,thus guiding oil and gas exploration on the gentle slope of the Jiyang depression.The Dongying formation in the eastern slope of the Chengdao region is relatively less explored,so that performing sequence stratigraphy study and constructing stratigraphic framework are crucial issues for oil and gas exploration.Oil and gas exploration on the gentle slope of the Jiyang depression has been carried out effectively by applying sequence stratigraphy,coupling with deposition characteristics,determining stratigraphic boundary,delineating seismic cycle and establishing stratigraphic sequence.
引文
[1]威尔格斯C K.层序地层学原理(海平面变化综合分析)[M].徐怀大译.北京:石油工业出版社,1993:1-21.
[2]Zeng HL,Ambrose W A,Villalta E.Seismic sedimentolo-gy and regional depositional systems in Mioceno Norte,lake Maracaibo,Venezuela[J].Leading Edge,2001,20(1):1260-1269.
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[4]周海民,董月霞,谢占安,等.断陷盆地精细勘探-渤海湾盆地南堡凹陷精细勘探实践与认识[M].北京:石油工业出版社,2004:23-37.
[5]邢国才,曲兆选.层序地层学原理在地震剖面解释中的应用[J].特种油气藏,2004,11(2):24-25.
[6]Liu Chuanhu.Seismic Responses of Texture-sequenceModels and Their Applications in Hydrocarbon Explora-tion[J].Applied Geophysics,2005,2(1):21-25.
[7]冯磊,姜在兴,田继军.东营凹陷沙四上亚段层序地层格架研究[J].特种油气藏,2009,16(1):16-19.
[8]朱筱敏,王贵迎.内蒙古钱家庄凹陷侏罗系层序地层与岩性圈闭[J].石油勘探与开发,2000,27(2):48-52.
[9]邓宏文.高分辨率层序地层学-原理及应用[M].北京:地质出版社,2002:10-17.
[2]Zeng HL,Ambrose W A,Villalta E.Seismic sedimentolo-gy and regional depositional systems in Mioceno Norte,lake Maracaibo,Venezuela[J].Leading Edge,2001,20(1):1260-1269.
[3]樊太亮,李卫东.层序地层学应用于陆相油藏预测的成功实例[J].石油学报,1999,20(2),12-17.
[4]周海民,董月霞,谢占安,等.断陷盆地精细勘探-渤海湾盆地南堡凹陷精细勘探实践与认识[M].北京:石油工业出版社,2004:23-37.
[5]邢国才,曲兆选.层序地层学原理在地震剖面解释中的应用[J].特种油气藏,2004,11(2):24-25.
[6]Liu Chuanhu.Seismic Responses of Texture-sequenceModels and Their Applications in Hydrocarbon Explora-tion[J].Applied Geophysics,2005,2(1):21-25.
[7]冯磊,姜在兴,田继军.东营凹陷沙四上亚段层序地层格架研究[J].特种油气藏,2009,16(1):16-19.
[8]朱筱敏,王贵迎.内蒙古钱家庄凹陷侏罗系层序地层与岩性圈闭[J].石油勘探与开发,2000,27(2):48-52.
[9]邓宏文.高分辨率层序地层学-原理及应用[M].北京:地质出版社,2002:10-17.
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