哈萨克斯坦南图尔盖盆地油气地质特征及勘探潜力分析  

Oil-gas geological features and its exploration potential in South Turgay Basin,Kazakhstan

作　　者：孔祥宇[1] 殷进垠[1] 张发强[1] 

机构地区：[1]中国石化石油勘探开发研究院,北京100083

出　　处：《岩性油气藏》2007年第3期48-53,共6页Lithologic Reservoirs

摘　　要：南图尔盖盆地是哈萨克斯坦中南部重要的含油气盆地,为中生代裂谷盆地,具有垒堑相间结构,南部阿尔斯库姆坳陷是盆地的沉积中心和主要的生烃灶,自西向东由4个北西—南东向展布的地堑组成,已发现的十余个油田均位于地堑间的次级隆起与斜坡部位。盆地主要沉积侏罗系—白垩系地层,由下至上发育了几个大型的区域不整合。直接覆盖在前侏罗系变形基底之上的是下、中侏罗统泥岩为主的生油层系,上侏罗统河道砂体及下白垩统一套广泛发育的席状砂是主要储层,其上一套稳定的湖泊相页岩成为区域盖层,生储盖配置关系合理。该盆地虽然经历了20多年的勘探历程,大规模的优质储量大部分已被发现,但仍具勘探潜力,除构造圈闭外,斜坡部位的地层岩性圈闭和基底裂缝型风化壳都是未来的勘探方向。South Turgay Basin is an important oil-bearing basin in central south Kazakhstan,which is a rift basin of Mesozoic.The structure character is grabens separating horsts.Aryskum Trough in the south is the main depression and oil kitchen,including four NW-SE direction grabens from west to east.The oil fields found are located in the arches and slopes.The main genetic unit is Jurassic-Cretaceous series,and several regional unconformities exist through the sediments.Lower-Middle Jurassic mudstones are mainly source rocks,the principal reservoirs are the clastics of the Middle-Upper Jurassic and the Lower Cretaceous Formation,and early Cretaceous mudstone is regional seal.Although during more than 20 years exploration course,most large-size reserves have been found,there are many exploration potential fields.Except for the structure traps,the stratigraphic traps of Jurassic-Cretaceous Formations at the graben flanks and the basement weathered crust of Paleozoic are the future exploration directions.

关 键 词：油气地质特征 勘探潜力 南图尔盖盆地 

分 类 号：TE121.1[石油与天然气工程—油气勘探]