乌干达Albert湖凹陷陡坡带成藏模式
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摘要
乌干达Albert湖凹陷是世界上最年轻的生烃凹陷,至今仍处于断陷伸展阶段,特殊的地质背景使其具有独特油气富集特征。为了预测Albert湖西部陡坡带的勘探潜力,利用地震、钻井等资料开展了凹陷构造特征研究,系统分析了陡坡带石油地质条件和成藏模式。研究表明,板式陡坡带油气侧向运移,成藏条件优越;台阶式陡坡带以垂向运移为主,侧向运移为辅,成藏条件一般。运移和保存是Albert湖陡坡带油气富集的主控因素,西部陡坡带一台阶是有利勘探区带,资源潜力较大。此研究对非洲陆内裂谷油气勘探具有重要的指导作用。
As the youngest petroliferous basin in the world,the sag of Lake Albert has still undergone rifting up to present.This specific geologic condition leads to a special model of oil and gas enrichment.In order to evaluate and predict the exploration potential on west side of the Lake Albert,we applied seismic and drilling data for studies of the structural characteristics of the sag,and the petroleum geological conditions and accumulation pattern of oil and gas on the steep slope zone.Results show that one-step slope is perfect for lateral hydrocarbon migration and accumulation.Two-step slope is fair,but dominated by vertical migration.Migration and preservation are believed the main controlling factors for oil and gas enrichment on a steep slope as such in the Lake Albert.In the western steep slope,first step slope is favorable zone for exploration.
As the youngest petroliferous basin in the world,the sag of Lake Albert has still undergone rifting up to present.This specific geologic condition leads to a special model of oil and gas enrichment.In order to evaluate and predict the exploration potential on west side of the Lake Albert,we applied seismic and drilling data for studies of the structural characteristics of the sag,and the petroleum geological conditions and accumulation pattern of oil and gas on the steep slope zone.Results show that one-step slope is perfect for lateral hydrocarbon migration and accumulation.Two-step slope is fair,but dominated by vertical migration.Migration and preservation are believed the main controlling factors for oil and gas enrichment on a steep slope as such in the Lake Albert.In the western steep slope,first step slope is favorable zone for exploration.
引文
[1]张兴,童晓光.艾伯特裂谷盆地含油气远景评价——极低勘探程度盆地评价实例[J].石油勘探与开发,2001,28(2):102-106.
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[12]朱俊章,石和生,龙祖烈,等,珠一坳陷半地堑成藏系统成藏模式与油气分布格局[J].中国石油勘探,2015,20(1):24-37.
[13]王永诗,鲜本忠.车镇凹陷北部陡坡带断裂结构及其对沉积和成藏的控制[J].油气地质与采收率,2006,13(6):5-8.
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[15]王家亮,张金川,张杰,等.海拉尔盆地贝尔凹陷的油气运聚分析[J].现代地质,2003,17(4):459-465.
[16]尹丽娟.济阳坳陷陡坡带油气富集特征[J].海洋石油,2012,32(1):45-48.
[17]汪立,屈红军,张功成,等.东非坦桑尼亚盆地油气地质特征与勘探前景[J].海洋地质前沿,2017,33(12):46-52.
[18]杨小丽,房磊,徐伟,等.裂谷盆地高凝油藏扇三角洲沉积演化模式[J].特种油气藏,2016,25(1):19-23.
[19]于水,韩文明,赵伟,等.裂谷盆地陡断带三角洲沉积特征与成因模式[J].中国海上油气,2013,25(6):31-35.
[20]董朔朋,祝彦庆.乌干达Albert地堑中新—上新统沉积特征及控制因素[J].海洋地质前沿,2015,32(2):29-37.
[21]李明诚.石油与天然气运移[M].第四版.北京:石油工业出版社,2013.
[2]张可宝,史卜庆,徐志强,等.东非地区沉积盆地油气潜力浅析[J].天然气地球科学,2007,18(6):869-874.
[3]金宠,陈安清,楼章华,等.东非构造演化与油气成藏规律初探[J].吉林大学学报:地球科学版,2012,42(2):121-130.
[4]窦立荣,王建君,程顶胜,等.乌干达Albertine地堑石油地质条件与油气勘探潜力[J].地质学报,2004,78(4):506.
[5]陈经覃,胡滨.乌干达N油田流体面积初探[J].内蒙古石油化工,2015(18):43-45.
[6]赵伟,韩文明,胡滨,等.东非裂谷Albertine地堑石油地质条件和成藏规律[J].四川地质学报,2016,36(2):275-279.
[7]蔡文杰,韩文明,许志刚,等.东非Lake Albert盆地构造调节带特征及其对油气成藏的控制作用[J].地质科技情报,2015,34(4):120-123.
[8]程顶胜,窦立荣,王建君,等.乌干达Albertine地堑含沥青砂岩的发现及其地球化学意义[J].地球化学,2002,31(6):532-538.
[9]Chorowicz J.The East African rift system[J].Journal of African Earth Seiences,2005,43:379-410.
[10]Karner G D,Byamungu B R,Ebinger C J,et al.Distribution of crustal extension and regional basin architecture of Albertine rift system,East Africa[J].Marine and Petroleum Geology,2000,17:1131-1150.
[11]童晓光,窦立荣,田作基,等.苏丹穆格莱特盆地的地质模式和成藏模式[J].石油学报,2004,25(1):19-24.
[12]朱俊章,石和生,龙祖烈,等,珠一坳陷半地堑成藏系统成藏模式与油气分布格局[J].中国石油勘探,2015,20(1):24-37.
[13]王永诗,鲜本忠.车镇凹陷北部陡坡带断裂结构及其对沉积和成藏的控制[J].油气地质与采收率,2006,13(6):5-8.
[14]王志刚,东营凹陷北部陡坡构造岩相带油气成藏模式[J].石油勘探与开发,2003,30(4):10-12.
[15]王家亮,张金川,张杰,等.海拉尔盆地贝尔凹陷的油气运聚分析[J].现代地质,2003,17(4):459-465.
[16]尹丽娟.济阳坳陷陡坡带油气富集特征[J].海洋石油,2012,32(1):45-48.
[17]汪立,屈红军,张功成,等.东非坦桑尼亚盆地油气地质特征与勘探前景[J].海洋地质前沿,2017,33(12):46-52.
[18]杨小丽,房磊,徐伟,等.裂谷盆地高凝油藏扇三角洲沉积演化模式[J].特种油气藏,2016,25(1):19-23.
[19]于水,韩文明,赵伟,等.裂谷盆地陡断带三角洲沉积特征与成因模式[J].中国海上油气,2013,25(6):31-35.
[20]董朔朋,祝彦庆.乌干达Albert地堑中新—上新统沉积特征及控制因素[J].海洋地质前沿,2015,32(2):29-37.
[21]李明诚.石油与天然气运移[M].第四版.北京:石油工业出版社,2013.