鄂尔多斯盆地西南缘延长组湖盆底形演化研究
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摘要
鄂尔多斯盆地西南缘延长组具有非常丰富的油气资源,是近年来增储上产的主要领域,明确盆地底形的演化规律对今后的油气勘探具有非常重要的意义。通过对主要目的层的砂体堆砌样式、半深湖—深湖区的迁移规律研究,结合盆地大量存在的事件沉积,表明:上三叠统长7期是盆地西南缘秦岭造山最活跃的时期,地震频繁、火山喷发、物源区发生隆升,造山带前缘快速下沉,湖盆中心迅速向西南缘迁移,南陡北缓的不对称湖盆形成。湖盆底形由对称变为不对称、沉积相由曲流河三角洲转变为辫状河三角洲,浊积岩、凝灰岩、砂岩脉的形成均与秦岭造山有密切关系。根据湖盆底形的演化规律,认为盆地西南缘的华池—庆城—正宁地区长7段浊积岩砂体具有良好的油气勘探前景。
Southwest Ordos Basin has become a popular target in petroleum exploration and production,recently,which has plenty of petroleum resources,so a clear understanding of rules of basin bottom morphology is of greatsignificance in petroleum exploration. A study of stacking style of sandstones and migrating rules of deep lakeregion,together with,many event depositions show that the center of basin migrated from northeast to southwestalong with frequency earthquakes,lava,source uplift and front subside caused by Qinling orogenesis in period ofChang 7 Formation deposition. So,braided delta and turbidite formed in southwest basin because of asymmetricalbasin in which the south is steep and the north is slow. Basin bottom configuration changes from symmetrical toasymmetrical,and sedimentary facies changes from meandering delta to braided delta. At the same time,turbidite,tuff and sand dike are formed by Qinling orogenesis. Based on the evolution history of the lake basin bottom,theturbidite in Huachi,Qinchen and Zhenning area will be a potential petroleum exploring target.
Southwest Ordos Basin has become a popular target in petroleum exploration and production,recently,which has plenty of petroleum resources,so a clear understanding of rules of basin bottom morphology is of greatsignificance in petroleum exploration. A study of stacking style of sandstones and migrating rules of deep lakeregion,together with,many event depositions show that the center of basin migrated from northeast to southwestalong with frequency earthquakes,lava,source uplift and front subside caused by Qinling orogenesis in period ofChang 7 Formation deposition. So,braided delta and turbidite formed in southwest basin because of asymmetricalbasin in which the south is steep and the north is slow. Basin bottom configuration changes from symmetrical toasymmetrical,and sedimentary facies changes from meandering delta to braided delta. At the same time,turbidite,tuff and sand dike are formed by Qinling orogenesis. Based on the evolution history of the lake basin bottom,theturbidite in Huachi,Qinchen and Zhenning area will be a potential petroleum exploring target.
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.
[2]武富礼,李文厚,李玉宏,等.鄂尔多斯盆地上三叠统延长组三角洲沉积及演化[J].古地理学报,2004,6(3):307–315.
[3]蔺宏斌,侯明才,陈洪德,等.鄂尔多斯盆地上三叠统延长组沉积体系特征及演化[J].成都理工大学学报:自然科学版,2008,35(6):674–680.
[4]郑希民,宋广寿,王多云,等.陕甘宁盆地陇东地区长8油组厚层非均质砂体的沉积学解剖[J].2003,21(2):272–277.
[5]邓秀芹,李文厚,刘新社,等.鄂尔多斯盆地中三叠统与上三叠统地层界线讨论[J].地质学报,2009,83(8):1089–1096.
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[10]杨明慧,刘池洋,郑孟林,等.鄂尔多斯盆地中晚三叠世两种不同类型边缘层序构成及对构造活动响应[J].中国科学D辑:地球科学,2007,37(增刊I):173–184.
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[12]王起琮,李文厚,赵虹,等.鄂尔多斯盆地东南部三叠系延长组一段湖相浊积岩特征及意义[J].地质学报,2006,41(1):54–63.
[13]庞军刚,李文厚,石硕,等.陕北地区长7沉积相特征及石油地质意义[J].西北大学学报:自然科学版,2010,40(3):488–492.
[14]陈全红,李文厚,郭艳琴,等.鄂尔多斯盆地南部延长组浊积岩体系及油气勘探意义[J].地质学报,2006,80(5):656–663.
[15]李克勤.鄂尔多斯盆地大地构造对油气的控制作用[M]//李德生.中国含油气盆地构造学.北京:石油工业出版社,2002.
[16]丁晓琪,张哨楠,刘朋坤.镇泾区块延长组层序格架内油层分布规律研究[J].西南石油大学学报:自然科学版,2008,30(2):49–53.
[17]邓秀芹,蔺晓晓,刘显阳,等.鄂尔多斯盆地三叠系延长组沉积演化及其与早印支运动关系的探讨[J].古地理学报,2008,10(2):159–166.
[18]张文正,杨华,彭平安,等.晚三叠世火山活动对鄂尔多斯盆地长7优质烃源岩发育的影响[J].地球化学,2009,38(6):573–582.
[19]国吉安,庞军刚,王桂成,等.鄂尔多斯盆地晚三叠世延长组湖盆演化及石油聚集规律[J].世界地质,2010,29(2):277–283,291.
[20]马德波,李明,崔文娟,等.陇东地区延长组长6—长7段浊积岩分布规律[J].新疆石油地质,2010,31(1):33–36.
[21]Carrie A R,Peter S M,Mahoney J B,et al.Oriented clas-tic dike swarms as indicators of paleoslope?An exam-ple from the upper cretaceous nanaimo group,Canada[J].JournalofSedimentaryResearch,2002,72(1):192–200.
[22]刘化清,李相博,白云来,等.鄂尔多斯盆地“崆峒山砾岩”成因初步分析[J].天然气地球科学,2006,17(5):668–671.
[23]何自新,杨华,袁效奇.鄂尔多斯盆地地质剖面图集[M].北京:石油工业出版社,2004.
[24]吕强,赵俊兴,陈洪德,等.鄂尔多斯盆地南部中生界延长组物源与盆地底形分析[J].成都理工大学学报:自然科学版,2008,35(6):610–616.
[25]张国伟,孟庆仁,于在平,等.秦岭造山带的造山过程及其动力学特征[J].中国科学D辑:地球科学,1996,26(3):193–200.
[26]刘少峰,张国伟,程顺有,等.东秦岭—大别山及邻区挠曲类盆地演化与碰撞造山过程[J].地质科学,1999,34(3):336–346.
[27]鄢继华,陈世悦,宋国奇,等.三角洲前缘滑塌浊积扇形成过程初探[J].沉积学报,2004,22(4):573–578.
[28]张关龙,陈世悦,鄢继华,等.三角洲前缘滑塌浊积体形成过程模拟[J].沉积学报,2006,24(1):50–55.
[2]武富礼,李文厚,李玉宏,等.鄂尔多斯盆地上三叠统延长组三角洲沉积及演化[J].古地理学报,2004,6(3):307–315.
[3]蔺宏斌,侯明才,陈洪德,等.鄂尔多斯盆地上三叠统延长组沉积体系特征及演化[J].成都理工大学学报:自然科学版,2008,35(6):674–680.
[4]郑希民,宋广寿,王多云,等.陕甘宁盆地陇东地区长8油组厚层非均质砂体的沉积学解剖[J].2003,21(2):272–277.
[5]邓秀芹,李文厚,刘新社,等.鄂尔多斯盆地中三叠统与上三叠统地层界线讨论[J].地质学报,2009,83(8):1089–1096.
[6]张哨楠,胡江柰,沙文武,等.鄂尔多斯盆地南部镇泾地区延长组的沉积特征[J].矿物岩石,2000,20(4):25–30.
[7]贾承造,魏国齐,李本亮,等.中国中西部两期前陆盆地的形成及其控气作用[J].石油学报,2003,24(2):13–17.
[8]贾承造,宋岩,魏国齐,等.中国中西部前陆盆地的地质特征及油气聚集[J].地学前缘,2005,12(3):3–13.
[9]汪泽成,刘和甫,熊宝贤,等.从前陆盆地充填地层分析盆山耦合关系[J].地球科学中国地质大学学报,2001,26(1):33–39.
[10]杨明慧,刘池洋,郑孟林,等.鄂尔多斯盆地中晚三叠世两种不同类型边缘层序构成及对构造活动响应[J].中国科学D辑:地球科学,2007,37(增刊I):173–184.
[11]赵红格,刘池洋,王建强,等.鄂尔多斯盆地西部晚三叠世构造属性探讨[J].中国地质,2007,34(3):384–391.
[12]王起琮,李文厚,赵虹,等.鄂尔多斯盆地东南部三叠系延长组一段湖相浊积岩特征及意义[J].地质学报,2006,41(1):54–63.
[13]庞军刚,李文厚,石硕,等.陕北地区长7沉积相特征及石油地质意义[J].西北大学学报:自然科学版,2010,40(3):488–492.
[14]陈全红,李文厚,郭艳琴,等.鄂尔多斯盆地南部延长组浊积岩体系及油气勘探意义[J].地质学报,2006,80(5):656–663.
[15]李克勤.鄂尔多斯盆地大地构造对油气的控制作用[M]//李德生.中国含油气盆地构造学.北京:石油工业出版社,2002.
[16]丁晓琪,张哨楠,刘朋坤.镇泾区块延长组层序格架内油层分布规律研究[J].西南石油大学学报:自然科学版,2008,30(2):49–53.
[17]邓秀芹,蔺晓晓,刘显阳,等.鄂尔多斯盆地三叠系延长组沉积演化及其与早印支运动关系的探讨[J].古地理学报,2008,10(2):159–166.
[18]张文正,杨华,彭平安,等.晚三叠世火山活动对鄂尔多斯盆地长7优质烃源岩发育的影响[J].地球化学,2009,38(6):573–582.
[19]国吉安,庞军刚,王桂成,等.鄂尔多斯盆地晚三叠世延长组湖盆演化及石油聚集规律[J].世界地质,2010,29(2):277–283,291.
[20]马德波,李明,崔文娟,等.陇东地区延长组长6—长7段浊积岩分布规律[J].新疆石油地质,2010,31(1):33–36.
[21]Carrie A R,Peter S M,Mahoney J B,et al.Oriented clas-tic dike swarms as indicators of paleoslope?An exam-ple from the upper cretaceous nanaimo group,Canada[J].JournalofSedimentaryResearch,2002,72(1):192–200.
[22]刘化清,李相博,白云来,等.鄂尔多斯盆地“崆峒山砾岩”成因初步分析[J].天然气地球科学,2006,17(5):668–671.
[23]何自新,杨华,袁效奇.鄂尔多斯盆地地质剖面图集[M].北京:石油工业出版社,2004.
[24]吕强,赵俊兴,陈洪德,等.鄂尔多斯盆地南部中生界延长组物源与盆地底形分析[J].成都理工大学学报:自然科学版,2008,35(6):610–616.
[25]张国伟,孟庆仁,于在平,等.秦岭造山带的造山过程及其动力学特征[J].中国科学D辑:地球科学,1996,26(3):193–200.
[26]刘少峰,张国伟,程顺有,等.东秦岭—大别山及邻区挠曲类盆地演化与碰撞造山过程[J].地质科学,1999,34(3):336–346.
[27]鄢继华,陈世悦,宋国奇,等.三角洲前缘滑塌浊积扇形成过程初探[J].沉积学报,2004,22(4):573–578.
[28]张关龙,陈世悦,鄢继华,等.三角洲前缘滑塌浊积体形成过程模拟[J].沉积学报,2006,24(1):50–55.
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