冀中坳陷长洋淀地区“古储古堵”潜山成藏模式
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摘要
"新生古储"潜山成藏模式对以华北油田为代表的一大批古潜山油气田的勘探起到了重要作用。但是,随着勘探程度的提高,此类油藏已无新的发现。利用钻井、测井、化验分析和高品质三维地震资料,对长洋淀潜山内幕地层反射结构、储盖组合及分布特征的研究发现:该区潜山内幕地层自上而下为下古生界寒武系、新元古界青白口系和中元古界蓟县系,发育了寒武系府君山组为储层、馒头组为盖层和中元古界蓟县系雾迷山组为储层、新元古界青白口系为盖层的两套储盖组合。储层主要为白云岩,裂缝发育,具有较好的储集物性,而且新元古界青白口系可以形成对中元古界蓟县系雾迷山组的有效封堵,油源来自于下第三系,以断层和不整合面为主要供油通道,形成了"古储古堵"新类型潜山成藏模式。根据这一模式钻探了长3井,获得了高产油流。
The buried-hill reservoir-forming mode of "new source rock-old reservoir" provided the exploration direction for a great number of buried-hill oil and gas fields such as Huabei Oilfield.With the increase of exploration degree,this kind of reservoir has been run out.The strata reflection texture,precisely reservoir-cap assemblages and distribution of buried-hill stratigraphy in Changyangdian area were studied by using available information of drilling,logging,laboratory test and high-quality 3D seismic data.The buried-hill stratigraphy includes the Lower Paleozoic Cambrian system,the New Proterozoic Qingbaikou system and the Middle Proterozoic Jixian system from top to bottom.Two reservoir-cap rock assemblages(the Cambrian Fujunshan Formation as reservoir and Mantou Formation as cap rock,and Wumishan Formation of the Middle Proterozoic Jixian system as reservoir and the New Proterozoic Qingbaikou system as cap rock) were developed.The reservoirs with predominated dolomites have good physical properties and developed fractures.Qingbaikou Formation of the New Proterozoic could be acted as the effective sealing formation for Wumishan Formation of the Middle Proterozoic.The hydrocarbon was derived from the Palaeogene,and the migration paths of hydrocarbon mainly included fault and unconformity surface.The buried-hill reservoir-forming mode of "old reservoir-old sealing formation" consequently generated.This mode was used to drill Chang3 Well where the high-yield oil production was obtained.
The buried-hill reservoir-forming mode of "new source rock-old reservoir" provided the exploration direction for a great number of buried-hill oil and gas fields such as Huabei Oilfield.With the increase of exploration degree,this kind of reservoir has been run out.The strata reflection texture,precisely reservoir-cap assemblages and distribution of buried-hill stratigraphy in Changyangdian area were studied by using available information of drilling,logging,laboratory test and high-quality 3D seismic data.The buried-hill stratigraphy includes the Lower Paleozoic Cambrian system,the New Proterozoic Qingbaikou system and the Middle Proterozoic Jixian system from top to bottom.Two reservoir-cap rock assemblages(the Cambrian Fujunshan Formation as reservoir and Mantou Formation as cap rock,and Wumishan Formation of the Middle Proterozoic Jixian system as reservoir and the New Proterozoic Qingbaikou system as cap rock) were developed.The reservoirs with predominated dolomites have good physical properties and developed fractures.Qingbaikou Formation of the New Proterozoic could be acted as the effective sealing formation for Wumishan Formation of the Middle Proterozoic.The hydrocarbon was derived from the Palaeogene,and the migration paths of hydrocarbon mainly included fault and unconformity surface.The buried-hill reservoir-forming mode of "old reservoir-old sealing formation" consequently generated.This mode was used to drill Chang3 Well where the high-yield oil production was obtained.
引文
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[6]杨彩虹,刘俊奇,王权,等.冀中坳陷深层油气成藏条件分析及勘探前景[G]∥谯汉生,罗治斌,李先奇.中国东部深层石油勘探论文集.北京:石油工业出版社,2001:179-203.Yang Caihong,Liu Junqi,Wang Quan,et al.Reservoir-formingcondition and exploration potential of deep formation in JizhongDepression[G]∥Qiao Hansheng,Luo Zhibin,Li Xianqi.Symposiaof deep petroleum exploration in Eastern China.Beijing:PetroleumIndustry Press,2001:179-203.
[7]袁选俊,靳久强,孟庆仁,等.冀中坳陷杨村斜坡结构成因及油气成藏模式[J],石油学报,2004,25(4):19-22.Yuan Xuanjun,Jin Jiuqiang,Meng Qingren,et al.Genetic charac-teristics and hydrocarbon accumulation model of Yangcun Slope inJizhong Depression[J].Acta Petrolei Sinica,2004,25(4):19-22.
[8]张吉光,王金奎,秦龙卜,等.海拉尔盆地贝尔断陷苏德尔特变质岩潜山油藏特征[J],石油学报,2007,28(4):21-25.Zhang Jiguang,Wang Jinkui,Qin Longbo,et al.Characteristics ofmetamorphic buried hill reservoir in Sude’erte of Beir Fault De-pression in Hailar Basin[J].Acta Petrolei Sinica,2007,28(4):21-25.
[2]马立驰.济阳坳陷碳酸盐岩潜山油气藏勘探技术综述[J].石油学报,2004,25(6):44-47.Ma Lichi.Overview of exploration techniques for carbonate bur-ied-hill reservoir in Jiyang Depression[J].Acta Petrolei Sinica,2004,25(6):44-47.
[3]李丕龙,张善文,王永诗,等.断陷盆地多样性潜山成因及成藏研究———以济阳坳陷为例[J].石油学报,2004,25(3):28-31.Li Pilong,Zhang Shanwen,Wang Yongshi,et al.Multiplex buried-hill genesis and pool-forming in rifted basin[J].Acta Petrolei Sin-ica,2004,25(3):28-31.
[4]邹伟宏,张放,崔占堂,等.冀中油气区中元古—古生界及沉积环境[M].北京:石油工业出版社,2001:133-143.Zou Weihong,Zhang Fang,Cui Zhantang,et al.Middle Proterozo-ic-Paleozoic and sedimentary environment of Jizhong hydrocarbonarea[M].Beijing:Petroleum Industry Press,2001:133-143.
[5]余家仁,陶洪兴,樊哲仁,等.华北潜山油藏碳酸盐岩储集层研究[M].北京:石油工业出版社,1993:50-60.Yu Jiaren,Tao Hongxing,Fan Zheren,et al.Carbonate reservoirof buried-hill in Huabei Oilfield[M].Beijing:Petroleum IndustryPress,1993:50-60.
[6]杨彩虹,刘俊奇,王权,等.冀中坳陷深层油气成藏条件分析及勘探前景[G]∥谯汉生,罗治斌,李先奇.中国东部深层石油勘探论文集.北京:石油工业出版社,2001:179-203.Yang Caihong,Liu Junqi,Wang Quan,et al.Reservoir-formingcondition and exploration potential of deep formation in JizhongDepression[G]∥Qiao Hansheng,Luo Zhibin,Li Xianqi.Symposiaof deep petroleum exploration in Eastern China.Beijing:PetroleumIndustry Press,2001:179-203.
[7]袁选俊,靳久强,孟庆仁,等.冀中坳陷杨村斜坡结构成因及油气成藏模式[J],石油学报,2004,25(4):19-22.Yuan Xuanjun,Jin Jiuqiang,Meng Qingren,et al.Genetic charac-teristics and hydrocarbon accumulation model of Yangcun Slope inJizhong Depression[J].Acta Petrolei Sinica,2004,25(4):19-22.
[8]张吉光,王金奎,秦龙卜,等.海拉尔盆地贝尔断陷苏德尔特变质岩潜山油藏特征[J],石油学报,2007,28(4):21-25.Zhang Jiguang,Wang Jinkui,Qin Longbo,et al.Characteristics ofmetamorphic buried hill reservoir in Sude’erte of Beir Fault De-pression in Hailar Basin[J].Acta Petrolei Sinica,2007,28(4):21-25.
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