PETROLEUM SYSTEM IN THE SUFYAN DEPRESSION OF MUGLAD BASIN IN SUDAN
-
摘要: 苏丹穆格莱德(Muglad)盆地位于中非巨型走滑断裂带的东端部,是一个大型中生代含油气裂谷盆地。苏夫焉(Sufyan)凹陷位于该盆地北区块的最北侧,下白垩统阿布加布拉(Abu Gabra)组是烃源岩、Abu Gabra组的三角洲砂体和本蒂组(Bentiu)组的河道砂岩是主要储集层;上白垩统达尔富尔(Darfur)群为区域盖层;油气圈闭类型主要为断背斜、断鼻和断块等。苏夫焉凹陷含油气系统纵向上划分为二个亚系统,第一套沉积旋回Abu Gabra组自生自储自盖亚系统及第一套和第二套沉积旋回组成的下生上储盖亚系统,即Abu Gabra组生油岩、Bentiu组河道厚砂岩储层和Darfur群泥岩盖层组合,它们都是本区有利的勘探组合。该凹陷中部构造带是油气有利聚集区带,有些良好的勘探前景。Abstract: The Muglad Basin in Sudan is located the eastern boundary of Central Africa Strike-slip Fault Zone,is a large Mesozoic petroliferous rift basin.The Sufyan Depression is located most north end in this basin.Lower Cretaceous Abu Gabra Formation is an effective hydrocarbon source rock.Favorable reservoir in this area is the Abu Gabra Formation channel sandbody in delta or fan delta.Upper Cretaceou Darfur Group is the region cap rock.The hydrocarbon trap types have fault antiCline,fault nose and fault block etc.The Sufyan Depression has two petroleum subsystems vertically,among which Abu Gabra Fm subsystem has favorable assemblage with self generating,collecting and sealing.While the other petroleum subsystem is composed of Abu Gabra Fm source rock,Bentiu Fm channel sandstone reservoir and Darfur Group shale seal.Both they are favorable for exploration.The Central structure belt of the Sufyan Depression is most favorable for exploration.
-
[1] Chull T J.Rift basins of interior Sudan:petroleum exploration and discvery[J].AAPG Bulletin,1988,72:1128~1142 [2] Allen P A,Allen J R.Basin analysis:principles and applications[M].Oxford:Blackwell Scientific Publications,1990 [3] Genik G J.Petroleum geology of Cretaceous-Tertiary rift basin in Niger,Chad and Central African Republic[J].AAPG Bulletin,1993,78(8):1405~1434 [4] 张亚敏,陈发景.穆格莱德盆地形成特点与勘探潜力[J].石油与天然气地质,2002,23(3):236~240 [5] 张亚敏,漆家福.穆格莱德盆地构造地质特征与油气富集[J].石油与天然气地质,2007,28(5):669~674 [6] Schandelmeier H,Pudlo D.The Central African Fault Zone(CAFZ) in Sudan:a possible continental transform fault[J].Berl Geowiss Abh A,1990,120(1):31~44 [7] 李德江,朱筱敏,杨俊生.苏丹Muglad盆地Fula坳陷白垩系Abu Gabra组地震相研究[J].石油与天然气地质2007,28(1):55~62 [8] 姜辉,于兴河,李庆明等.Muglad盆地Nugara坳陷东凹Darfur群地震层序格架和地震相[J].油气地质与采收率,2006,13(5):24~27 [9] 马永生,傅强,郭彤楼等.川东北地区普光气田长兴-飞仙关气藏成藏模式与成藏过程[J].石油实验地质,2005,27(5):455~460 [10] 童晓光,窦立荣,田作基等.苏丹穆格莱德盆地的地质模式和成藏模式[J].石油学报,2004,25(1):21~26 [11] 张亚敏.中非 Muglad 盆地北区构造特征[J].石油勘探与开发,2007,34(4):502~507 [12] 黄先雄,王升兰.苏丹裂谷盆地高酸值原油成因分析[J].油气地质与采收率,2006,13(5):43~46 [13] 黄泽光,高长林.南华北中生代火山岩与前渊盆地[J].石油实验地质,2006,28(1):1~7 [14] 张亚敏,陈发景.穆格莱德盆地构造调节带与勘探前景[J].中国石油勘探,2006,11(3):79~83 -
计量
- 文章访问数: 1036
- HTML全文浏览量: 140
- PDF下载量: 392
- 被引次数: 0