鄂尔多斯盆地麻黄山地区延安组层序地层及沉积相分析
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摘要
已有的钻井资料表明,麻黄山地区延安组具有良好的油气勘探潜力。通过对地震资料、岩心资料、测井曲线、薄片鉴定等分析,认为鄂尔多斯盆地西缘延安组经历了下切河谷充填、三角洲平原、前三角洲、三角洲前缘、三角洲平原和曲流河沉积的演化过程,为一个完整的湖侵—湖退旋回。低位体系域主要为下切河谷充填砂岩,其分布受早侏罗世古地貌的控制,优先堆积在古地貌较低的区域;水进体系域为三角洲平原沉积,最大湖泛面处于前三角洲的黑色泥岩中;高位体系域由三角洲平原和曲流河沉积组成。最大湖泛面的存在将延安组油藏分为源外组合和远源组合。源外组合,特别是低位体系域的下切河谷充填砂岩具有砂体厚、储集物性好、离烃源岩近、圈闭类型丰富等成藏条件,利于油气的聚集;而远源组合只是源外组合破坏后,油气运移至高位体系中形成次生油藏。
Yan'an Formation has great potential for oil and gas exploration in Mahuangshan area of western Ordos Basin.Based on the analysis of seismic data,well cores,well logging and cast slice,it is believed that Yan'an Formation experiences evolvement of incised valley filling,delta plain,prodelta,and delta plain-meandering river,so it is a whole transgression and regression cycle.Low system tract is composed of filling sandstones of incised valley,of which the distribution is controlled by Early Jurassic palaeogeomorphology,and the sandstone deposited in lower places.Transgressive system tract consists of delta plain,and maximum flooding surface lies in black mudstones of prodelta.High system tract is composed of delta plain and meandering river.Outside-source play and distal-source play are distinguished by maximum flooding surface.Filling sandstones of incised valley of low system tract have thick sandstones,high reservoirs,near resources and plentiful traps,so outside-source can trap petroleum easily.However,distal-source plays are secondary reservoirs which formin high systemtract and are destroyed fromoutside-source play.
Yan'an Formation has great potential for oil and gas exploration in Mahuangshan area of western Ordos Basin.Based on the analysis of seismic data,well cores,well logging and cast slice,it is believed that Yan'an Formation experiences evolvement of incised valley filling,delta plain,prodelta,and delta plain-meandering river,so it is a whole transgression and regression cycle.Low system tract is composed of filling sandstones of incised valley,of which the distribution is controlled by Early Jurassic palaeogeomorphology,and the sandstone deposited in lower places.Transgressive system tract consists of delta plain,and maximum flooding surface lies in black mudstones of prodelta.High system tract is composed of delta plain and meandering river.Outside-source play and distal-source play are distinguished by maximum flooding surface.Filling sandstones of incised valley of low system tract have thick sandstones,high reservoirs,near resources and plentiful traps,so outside-source can trap petroleum easily.However,distal-source plays are secondary reservoirs which formin high systemtract and are destroyed fromoutside-source play.
引文
[1]何自新.鄂尔多斯盆地演化与油气[M].北京:石油工业出版社,2003:199-200.
[2]宋凯,吕剑文,凌升阶,等.鄂尔多斯盆地定边—吴旗地区前侏罗纪古地貌与油藏[J].古地理学报,2003,5(4):497-508.
[3]冯一波,丁晓琪,谢世文,等.麻黄山地区中生界油气分布规律及控制因素分析[J].岩性油气藏,2009,21(3):60-64.
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[6]王英民.对层序地层学工业化应用中层序分级混乱问题的探讨[J].岩性油气藏,2007,19(1):9-15.
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[9]丁晓琪,张哨楠,刘岩.鄂尔多斯盆地南部镇泾油田前侏罗纪古地貌与油层分布规律[J].地球科学与环境学报,2008,30(4):385-388.
[10]郭正权.鄂尔多斯盆地侏罗系古地貌油田的形成条件与分布规律[M]∥杨华.低渗透油气田研究与实践.北京:石油工业出版社,2001:51-60.
[11]丁晓琪,张哨楠.鄂尔多斯盆地西南缘延安组层序地层分析[J].成都理工大学学报(自然科学版),2008,35(6):681-686.
[12]Ye Liangmiao,Kerr D.Sequence stratigraphy of the middle Pennsyl-vanian Bartlesville sandstone,northeastern Oklahoma:A case of an underfilled incised valley[J].AAPG Bulletin,2000,84(8):1185-1203.
[13]时志强,韩永林,赵俊兴,等.鄂尔多斯盆地中南部中侏罗世延安期沉积体系及岩相古地理演化[J].地球学报,2003,24(1):49-54.
[14]邓秀芹,刘新社,李士祥.鄂尔多斯盆地三叠系延长组超低渗透储层致密史与油藏成藏史[J].石油与天然气地质,2009,30(2):156-161.
[15]Yang Yongtai,Li Wei,Ma Long.Tectonic and stratigraphic controls of hydrocarbon systems in the Ordos basin:A multicycle cratonic basin in central China[J].AAPG Bulletin,2005,89(2):255-269.
[16]谢世文,张哨楠,丁晓琪,等.鄂尔多斯盆地麻黄山地区油气分布及成藏特征[J].天然气地球科学,2010,21(2):238-242.
[17]丁晓琪,张哨楠,谢世文,等.鄂尔多斯盆地西缘麻黄山地区中生界油气分布规律[J].石油与天然气地质,2009,30(6):726-732.
[18]Kerr D R,Ye L M,Bahar A,et al.Glenn pool field,Oklahoma:A case of improved production from a mature reservoir[J].AAPG Bulletin,1999,83(1):1-18.
[2]宋凯,吕剑文,凌升阶,等.鄂尔多斯盆地定边—吴旗地区前侏罗纪古地貌与油藏[J].古地理学报,2003,5(4):497-508.
[3]冯一波,丁晓琪,谢世文,等.麻黄山地区中生界油气分布规律及控制因素分析[J].岩性油气藏,2009,21(3):60-64.
[4]Shanley K W,McCabe P J.Perspectives on the sequence stratigraphy of continental strata[J].AAPG Bulletin,1994,78(4):544-568.
[5]庞雄奇,陈冬霞,张俊.隐蔽油气藏的概念与分类及其在实际应用中需要注意的问题[J].岩性油气藏,2007,19(1):1-8.
[6]王英民.对层序地层学工业化应用中层序分级混乱问题的探讨[J].岩性油气藏,2007,19(1):9-15.
[7]熊翥.地层岩性油气藏勘探[J].岩性油气藏,2008,20(4):1-8.
[8]郭正权,张立荣,楚美娟,等.鄂尔多斯盆地南部前侏罗纪古地貌对延安组下部油藏的控制作用[J].古地理学报,2008,10(1):63-72.
[9]丁晓琪,张哨楠,刘岩.鄂尔多斯盆地南部镇泾油田前侏罗纪古地貌与油层分布规律[J].地球科学与环境学报,2008,30(4):385-388.
[10]郭正权.鄂尔多斯盆地侏罗系古地貌油田的形成条件与分布规律[M]∥杨华.低渗透油气田研究与实践.北京:石油工业出版社,2001:51-60.
[11]丁晓琪,张哨楠.鄂尔多斯盆地西南缘延安组层序地层分析[J].成都理工大学学报(自然科学版),2008,35(6):681-686.
[12]Ye Liangmiao,Kerr D.Sequence stratigraphy of the middle Pennsyl-vanian Bartlesville sandstone,northeastern Oklahoma:A case of an underfilled incised valley[J].AAPG Bulletin,2000,84(8):1185-1203.
[13]时志强,韩永林,赵俊兴,等.鄂尔多斯盆地中南部中侏罗世延安期沉积体系及岩相古地理演化[J].地球学报,2003,24(1):49-54.
[14]邓秀芹,刘新社,李士祥.鄂尔多斯盆地三叠系延长组超低渗透储层致密史与油藏成藏史[J].石油与天然气地质,2009,30(2):156-161.
[15]Yang Yongtai,Li Wei,Ma Long.Tectonic and stratigraphic controls of hydrocarbon systems in the Ordos basin:A multicycle cratonic basin in central China[J].AAPG Bulletin,2005,89(2):255-269.
[16]谢世文,张哨楠,丁晓琪,等.鄂尔多斯盆地麻黄山地区油气分布及成藏特征[J].天然气地球科学,2010,21(2):238-242.
[17]丁晓琪,张哨楠,谢世文,等.鄂尔多斯盆地西缘麻黄山地区中生界油气分布规律[J].石油与天然气地质,2009,30(6):726-732.
[18]Kerr D R,Ye L M,Bahar A,et al.Glenn pool field,Oklahoma:A case of improved production from a mature reservoir[J].AAPG Bulletin,1999,83(1):1-18.
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