北非含油气系统特征与勘探潜力  

Analysis of petroleum system characteristic and the exploration potential in North Africa

作　　者：宋成鹏[1] 童晓光 张光亚[1] 温志新[1] 王兆明[1] 汪伟光[1] 

机构地区：[1]中国石油勘探开发研究院,北京100083 [2]中国石油天然气勘探开发公司,北京100034

出　　处：《油气地质与采收率》2013年第2期5-10,111,共6页Petroleum Geology and Recovery Efficiency

基　　金：国家科技重大专项"大型油气田及煤层气开发"(2011ZX05028-003)

摘　　要：北非经历了泛非期基底形成、早古生代稳定陆块演化、晚古生代抬升剥蚀、中生代裂陷和新生代反转隆升的多期盆地演化过程,形成了多个叠合盆地。与以往叠合盆地中往往形成叠加的含油气系统不同,北非古生代和中、新生代2大含油气系统互不叠置,分别分布于北非西部和中、东部盆地。系统分析了2大含油气系统的油气地质特征以及盆地演化对其互不叠置分布的控制作用,并提出了勘探潜力目标。西部盆地古生代含油气系统志留系阿卡库斯组泥岩和三叠系巨厚蒸发盐岩盖层之下、古隆起内及不整合面附近的圈闭以及中、东部盆地中、新生代含油气系统的地堑和地垒附近形成的断层和岩性圈闭及深部白垩系储集砂体为研究区的主要勘探潜力目标。North Africa region experienced extensional and compressive tectonic movement's reformation during the pan-African, alpine and hercynian periods, and passed through the complex basin evolution process which formed the pan-African basement, early Palaeozoic stable passive continental margin evolution, late Paleozoic Foreland evolution, Mesozoic rift evolution and Cenozoic reversal,and then caused the current western Paleozoic and east-central Mesozoic-Cenozoic petroleum system which are mutually uncorrelated in the plane. This paper systematically analyzed the geological characteristics of two big petroleum system and put forward the exploration potential targets, pointed out that, under the cover of Silurian-Carboniferous Acacus petroleum group, the Devonian Tadrart group and the Triassic thick evaporated salt, in ancient uplift and nearby unconformity trap are main exploration potential targets of west basin Paleozoic petroleum system; moreover, the fault and lithologic trap near the graben and horst and deep cretaceous sandbody are the main exploration potential targets of east-central basin Mesozoic-Cenozoic petroleum system, and the study has certain theoretical significance and practical value to know oil reservoir distribution rules so as to improve the success rate of exploration in North Africa.

关 键 词：含油气盆地 含油气系统特征 盆地演化 勘探潜力 北非 

分 类 号：TE111.1[石油与天然气工程—油气勘探]