酒泉盆地窟窿山构造特征与油气成藏规律
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摘要
窟窿山构造是酒泉盆地南缘山前冲断带最重要的控油构造,已发现亿吨级的青西油田。以断层相关褶皱和冲断构造理论为指导,利用地震、钻测井及地面露头资料合理建立了窟窿山构造模式,落实了整体构造形态。指出窟窿山构造整体上为一个完整的北西向大型断层转折背斜构造,发育多条北北东向调节断层,将其切割为五个北东向断块(窿107,窿11,窿8—窿7,窿15和窿14)。油气勘探表明,不同断块由于地层、岩相(性)不同,特别是裂缝发育程度的差异,造成油气富集程度的差异。综合评价认为其中的窿15区块是下步油气勘探有利目标,窟窿山构造深层也具有较大的勘探潜力。
Kulongshan structure is the most important oil-controlled structure of foreland thrust belt in southern margin of Jiuquan basin,in which the Qingxi Oilfield with ten million-ton-rank of reserve has been discovered.Taking the theory of fault-related folds and thrust structure as a guide and using seismic,drilling,logging and outcrops data to reasonably build up the structural mode of Kulongshan structure,which determined the total structural configuration,the paper points out that the Kulongshan structure is complete and large-scaled fault-turned anticline structure with NW direction on the whole and is cut to five fault blocks with NE direction by many developed adjustment faults with NNE direction,Long-107,Long-11,Long-8-Long-7,Long-15 and Long-14.The oil/gas exploration shows that since differences in formation and petrofacies(lithology),and especially in fracture-developing degree,the different fault blocks have different oil/gas-rich degree.Comprehensive appreciation knows that the Long-15 block among 5 blocks is perspective target in next oil/gas exploration,and the deep of Kulongshan structure has also the better exploration potential.
Kulongshan structure is the most important oil-controlled structure of foreland thrust belt in southern margin of Jiuquan basin,in which the Qingxi Oilfield with ten million-ton-rank of reserve has been discovered.Taking the theory of fault-related folds and thrust structure as a guide and using seismic,drilling,logging and outcrops data to reasonably build up the structural mode of Kulongshan structure,which determined the total structural configuration,the paper points out that the Kulongshan structure is complete and large-scaled fault-turned anticline structure with NW direction on the whole and is cut to five fault blocks with NE direction by many developed adjustment faults with NNE direction,Long-107,Long-11,Long-8-Long-7,Long-15 and Long-14.The oil/gas exploration shows that since differences in formation and petrofacies(lithology),and especially in fracture-developing degree,the different fault blocks have different oil/gas-rich degree.Comprehensive appreciation knows that the Long-15 block among 5 blocks is perspective target in next oil/gas exploration,and the deep of Kulongshan structure has also the better exploration potential.
引文
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[2]潘良云,谢结来等.酒泉盆地中新生代区域构造演化与油气勘探.石油与天然气地质,27(1):62～69
[3]赵贤正,夏义平,潘良云,谢结来.酒泉盆地南缘山前冲断带构造特征与油气勘探方向.石油地球物理勘探,2004,39(2):222～227
[4]贾承造,何登发,雷振宇等.前陆冲断带油气勘探.北京:石油工业出版社,2000
[2]潘良云,谢结来等.酒泉盆地中新生代区域构造演化与油气勘探.石油与天然气地质,27(1):62～69
[3]赵贤正,夏义平,潘良云,谢结来.酒泉盆地南缘山前冲断带构造特征与油气勘探方向.石油地球物理勘探,2004,39(2):222～227
[4]贾承造,何登发,雷振宇等.前陆冲断带油气勘探.北京:石油工业出版社,2000
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