东非裂谷东支Kerio盆地石油地质条件及有利勘探区带  

Petroleum Geological Conditions and Favorable Exploration Zones in the Kerio Basin, Eastern Branch of the East African Rift System

作　　者：贾屾 

机构地区：[1]中海油研究总院,北京

出　　处：《地球科学前沿（汉斯）》2018年第6期1003-1012,共10页Advances in Geosciences

摘　　要：东非裂谷东支South Lokichar盆地已有大量发现,Kerio盆地紧邻South Lokichar盆地,目前尚未突破。通过对钻井、地震及分析化验资料的综合分析,认为Kerio盆地具有较好的石油地质条件。该盆地发育两套主力烃源岩,生烃潜力较大。储层主要为河流相、三角洲相及扇三角洲相砂岩,储层厚度大,物性较好。岩性组合为砂泥岩互层,泥岩隔层可作为有效盖层。盆地主要发育三个圈闭带,圈闭类型为断层圈闭和背斜圈闭。以烃源岩评价为核心,结合其它石油地质条件,优选出北凹缓坡带和东凹凸起带两个有利勘探区带。A large number of discoveries have been made in the South Lokichar basin in the eastern branch of the East African Rift System. The Kerio basin is adjacent to the South Lokichar basin, but has been nothing to discover until now. It is considered that Kerio basin has good petroleum geological conditions through comprehensive analysis of drilling, seismic and laboratory data. There are two main source rocks developed in the Kerio basin with good hydrocarbon generation potential. The reservoirs are mainly fluvial facies, delta facies and fan delta facies sandstones with high reservoir thickness and good physical properties. The lithological association is sand shale interbedding, and mudstone interlayer can be used as an effective cover. There are three trap zones in the basin, and the trap styles are mainly fault trap and anticline trap. Taking source rock as the key element and combining with other petroleum geological conditions, two favorable exploration zones, the gentle slope zone in the northern sag and convex zone in the eastern sag, are selected.

关 键 词：Kerio盆地 石油地质条件 烃源岩 有利勘探区带 

分 类 号：P61[天文地球—矿床学]