东非Morondava盆地Tsimiroro稠油油田成藏特征

发布时间：2018-01-14 00:16

本文关键词：东非Morondava盆地Tsimiroro稠油油田成藏特征　出处：《地质科技情报》2017年05期 　论文类型：期刊论文

【摘要】：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。
[Abstract]:In order to deeply understand the reservoir forming characteristics and distribution of Tsimiroro heavy oil field in Madagascar Morondava basin of East Africa, the oil and gas accumulation theory is based on. The reservoir forming conditions of Tsimiroro heavy oil field are analyzed in detail, and the model of heavy oil reservoir formation is established. The main controlling factors of reservoir formation are defined. The results show that the reservoir formation conditions of the 1: Tsimiroro heavy oil field are superior, "double concave" for hydrocarbon supply and fault transportation. In the late Jurassic-early Cretaceous, the crude oil from the east and west sag zones moved along the oil-source fault to the central uplift belt to accumulate in the structural trap of the central uplift zone. Because of the fault development and shallow burial, the crude oil suffered from serious biodegradation and thickening. Hydrocarbon generation depression distribution pattern. The tectonic uplift of the central uplift zone and the oil-source faults and traps developed therefrom directly control the spatial distribution of the reservoir.
【作者单位】：长江大学资源与环境学院;南京大学地球科学与工程学院;中海油能源发展股份有限公司工程技术分公司;
【基金】：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)
【分类号】：P618.13
【正文快照】： 在全球石油资源中,稠油(API重度≤22.3°)和超稠油(API重度≤10.0°)资源相当丰富,仅加拿大西部和委内瑞拉东部的稠油总储量就达5.296×1012bbl,而全球石油资源大概是8.8×1012~13.2×1012bbl[1],占比40%~60%。由于稠油资源比常规石油开发成本高,其勘探开发形势易随国际原油价

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