不整合面输导体系研究——以中国南海Q盆地深水区古近系L组为例
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摘要
针对中国南海Q盆地深水区古近系L组的地质实际,主要利用地震资料对4个三级层序界面上的不整合面输导体系特征进行了详细研究。结果发现,不整合面为该区油气运移输导的主要路径。发育在盆地或凹陷边部的大地层倾角的角度不整合面主要对油气的垂向运移起作用,而发育在盆地或凹陷中心部位的平行不整合面,特别是那些大面积分布的平行不整合界面,对油气的侧向运移输导起主要作用,上述两类不整合面的有机组合完成了油气在时空上的大范围运移输导。结合沉积相展布特征、断层发育特征及烃源岩发育特征,研究发现深水区L组优势运移通道主要发育于凸起边缘不受断层封堵的连片不整合面处,而与这些优势输导体系相连的扇三角洲、斜坡扇、盆底扇、浊积扇及滩坝是油气勘探的有利区域。
Aimed at the geological status characteristics of Paleogene L Formation of Q basin in South China Sea,traversed characteristics of unconformity surface pathway system was divided in to 4 third class sequences boundary by using seismic date.The results show that unconformity surface pathway system becomes mainly way of oil and gas migration.That angle unconformity developed at the edge of basin or depression play an important role in the process of petroleum migration in the upright direction,and the parallel unconformity developed in the center of the basin or depression,and especially developed at large-scale play an important role in the process of petroleum migration in the landscape orientation.The two kinds of pathway systems completed the process of hydrocarbon large-scale migration by effective combination.Combined the characteristics of sediment and faults,superiority pathway systems mainly developed at the edge,which is blocked by the faults,and fan deltas,slope fan,basin floor fan,turbidite fan,beach bar connected with superiority pathway system are favorable prospecting area.
Aimed at the geological status characteristics of Paleogene L Formation of Q basin in South China Sea,traversed characteristics of unconformity surface pathway system was divided in to 4 third class sequences boundary by using seismic date.The results show that unconformity surface pathway system becomes mainly way of oil and gas migration.That angle unconformity developed at the edge of basin or depression play an important role in the process of petroleum migration in the upright direction,and the parallel unconformity developed in the center of the basin or depression,and especially developed at large-scale play an important role in the process of petroleum migration in the landscape orientation.The two kinds of pathway systems completed the process of hydrocarbon large-scale migration by effective combination.Combined the characteristics of sediment and faults,superiority pathway systems mainly developed at the edge,which is blocked by the faults,and fan deltas,slope fan,basin floor fan,turbidite fan,beach bar connected with superiority pathway system are favorable prospecting area.
引文
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[2]Brenda Beitler Bowen,Brigette A.Reflectance spectroscopic mapping of diagenetic heterogeneities andfluid-flowpathwaysinthe Juras-sic Navajo Sandstone[J].AAPG Bulletin,2007,91(2):173～190.
[3]朱筱敏,刘成林,曾庆猛等.我国典型天然气藏输导体系研究——以鄂尔多斯盆地苏里格气田为例[J].石油与天然气地质,2005,26(6):724～729.
[4]Hindle A D.Petroleum migration pathways and charge concentration:a three-di mensional model[J].AAPG Bulletin,1997,81(9):1451～1481.
[5]姜建群,胡建武.含油气系统中流体输导体系的研究[J].新疆石油地质,2000,21(3):193～196.
[6]张照录,王华,杨红.含油气盆地的输导体系研究[J].石油与天然气地质,2000,21(2):133～135.
[7]龚再升.中国近海大油气田[M].北京:石油工业出版社,1997.
[8]蔡乾忠.中国海域油气地质学[M].北京:海洋出版社,2005.
[9]朱筱敏.层序地层学[M].东营:石油大学出版社,2000.
[10]张万选,张厚福,曾洪流等.陆相地震地层学[M].东营:石油大学出版社,1993.
[11]孙家振,李兰斌.地震地质综合解释教程[M].武汉:中国地质大学出版社,2002.
[12]陈中红,查明,朱筱敏.准噶尔盆地陆梁隆起不整合面与油气运聚关系[J].古地理学报,2003,5(1):120～126.
[13]杨勇,查明,洪太元等.不整合分类研究进展与新型分类方案[J].地层学杂志,2007,31(3):288～295.
[14]何登发.不整合面的结构与油气聚集[J].石油勘探与开发,2007,34(2):142～201.
[15]李丕龙,张善文,宋国奇等.断陷盆地隐蔽油气藏形成机制——以渤海湾盆地济阳坳陷为例[J].石油实验地质,2004,26(1):3～10.
[16]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.
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