埃塞俄比亚欧加登盆地构造演化及有利区分析  

Analysis on Structural Evolution and Favorable Area of Ogaden Basin in Ethiopia

作　　者：李建英[1,2] 陈旭 张宾 杨金磊 苏奥 

机构地区：[1]中国地质大学,北京100083 [2]中油东方地球物理公司,天津300280 [3]中油渤海钻探工程有限公司,天津300457

出　　处：《特种油气藏》2015年第1期26-30,152,共5页Special Oil & Gas Reservoirs

基　　金：国家自然科学基金“不同干酪根类型烃源岩热解石油与石油包裹体显微荧光光谱特征比较研究”(41202088)

摘　　要：目前,欧加登盆地油气探明程度低,处于早期勘探评价阶段。结合区域地质资料、少量钻井和地震数据,认为盆地为东非裂谷系构造成因,伸展构造环境下(半)地堑、地垒、掀斜断块等构造样式常见,相应发育断(块)鼻圈闭、构造-岩性圈闭和生物礁建隆。勘探部署首选区为中央隆起带及外围斜坡地带。中央隆起带形成时间早,后期受东非大裂谷作用较弱,西部紧邻生油凹陷,发育多套储盖组合,成藏条件优越,且已经发现一定规模的油气藏,是寻找大中型油气田的有利区带。As its oil/gas proved degree is low,Ogaden Basin is in the phase of early exploration and assessment. With reference to the regional geological data,few drilling and seismic data,it is believed that the basin is originated from the structure of East African rift system. In the stretching structural environment,( semi)- graben,horst and tilted block are very common,and correspondingly faulted( block) nose traps,structural- litho trap and bio- reef uplift were developed. The preferred areas for the exploration deployment are the central uplift area and the peripheral slope area. The central uplift area was formed at the early stage,so later East Africa Rift had little effect on the central uplift. Its western part is adjacent to oil generation sag,developing multiple sets of reservoir- caprock assemblage. The accumulation conditions are very favorable and a certain amount of oil and gas reservoirs have been discovered. Therefore,it is the favorable area to look for medium and large oil and gas fields.

关 键 词：构造演化 成藏条件 欧加登盆地 勘探潜力 埃塞俄比亚 

分 类 号：TE122.1[石油与天然气工程—油气勘探]