东非Morondava盆地Tsimiroro稠油油田成藏特征Heavy Oil Accumulation Characteristics of the Tsimiroro Oilfield in Morondava Basin,Eastern Africa
何文祥,江凯禧,万欢,郭清正,李晶晶,赵才顺
摘要(Abstract):
为深入认识东非马达加斯加Morondava盆地Tsimiroro稠油油田成藏特征和分布规律,基于油气成藏理论,对Tsimiroro稠油油田成藏条件进行了详细分析,建立了其稠油成藏模式,明确了成藏主控制因素。研究结果表明:Tsimiroro稠油油田成藏具有生储盖条件优越、"双凹"供烃、断裂输导、近源运聚及凸起带富集的特征。在晚侏罗世-早白垩世,来自东、西部2个凹陷带的原油沿油源断裂近距离运移至中央凸起带构造圈闭中聚集成藏,由于断裂发育及埋藏浅,原油遭受了严重生物降解而稠变。生烃凹陷的分布格局、中央凸起带构造抬升及由此发育的油源断裂和构造圈闭则直接控制了油藏的空间分布范围。
关键词(KeyWords): 稠油;主控因素;成藏特征;Tsimiroro油田;Morondava盆地
基金项目(Foundation): 国家科技重大专项大型油气田及煤层气开发(2011ZX05033004-003);; 国家青年基金项目(41403030)
作者(Author): 何文祥,江凯禧,万欢,郭清正,李晶晶,赵才顺
DOI: 10.19509/j.cnki.dzkq.2017.0509
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