Petroleum Geological Characteristics and Exploration Potential of Jurassic Play,Ogaden Basin,Ethopia
Received date: 2014-03-26
Revised date: 2014-06-30
Online published: 2015-01-10
This paper analyzed the petroleum gelogical conditions of Jurassic play in Ogaden Basin,and the research shows that the conditions are favorable for hydrocarbon accmulation.Jurassic play could have many trap types,such as low amplitude anticline,fault block,oolitic limestone,dolomite lens,reef,local corrosin belt,and so on.In different part of the basin,the trap type may have some differences,but most of them will be lithology traps.The Uarandab Formation is the most important oil generation source rock in Ogaden Basin,and it is overlied on the Hamanlei Formation.Latteral migration will play a very important role in the oil accmulation,and regional palaeo uplift is the most favourable zone for oil accmulation.The vertical distribution of hydrocarbon is controlled by lithologic combination of Hamanlei Formation.The Middle Hamanlei Formation could be sourced by several sets of source rocks,so oil and gas pool all could be found.The most important source rock of Upper Hamanlei Formation is the Uarandab mud,and for it has poor interlayer seal,so oil pools are likely to be found near the top of the Upper Hamanlei Formation.The Calub uplift is a palaeo-uplift,reservoirs are best developed,fault and folds are also well developed in this area,and it is also surrounded by mature source rocks.The hydrocarbon accumulation conditions are good around Calub uplift,and it should be the most realistic exploration target.
WANG Jian-jun，LI Hao-wu，WANG Qing，HU Xiang-yu，BAI Jian-hui，ZHANG Ning-ning . Petroleum Geological Characteristics and Exploration Potential of Jurassic Play,Ogaden Basin,Ethopia[J]. Natural Gas Geoscience, 2015 , 26(1) : 90 -101 . DOI: 10.11764/j.issn.1672-1926.2015.01.0090
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