利比亚页岩油气资源潜力分析

Potential asessment of the shale gas and shale oil resources in Libya

近年来,页岩气勘探开发热潮席卷全球,成为目前能源领域关注的热点,并极大的改变了全球油气市场,产生了巨大全球政治经济影响。利比亚作为非洲石油储量之首,也将非常规勘探作为提高本国油气产量的重要手段。据美国能源信息署2013年公布数据,利比亚页岩油资源为260亿桶,页岩气技术可采资源量为290万亿ft3,是非洲最具页岩油气资源潜力的国家;同时,利比亚是北非最主要烃源岩——志留系页岩的沉积中心,蕴含的页岩油气资源非常丰富。但利比亚页岩油气研究相对滞后,本文利用页岩气资源评价方法,分析利比亚主要盆地富有机质页岩分布特征,预测页岩油气资源潜力并划分有利区,认为下志留统Tannezuft页岩和中上泥盆统Frasnian页岩是利比亚重要的页岩勘探层位,且Ghadames盆地的各项页岩评价参数较好,是值得进行页岩气勘探重点地区。

Libya is home to the Silurian"hot shale",the most important Palaeozoic hydrocarbon source rock in North Africa and Arabia,which could produce as much as double the amount of shale oil as deposits in Mexico and Venezuela combined.The shale gas and shale oil resource is mainly concentrate in three major hydrocarbon basins:the Ghadames(Berkine)Basin in the west,the Sirte Basin in the center,and the Murzuq Basin in the southwest of the country.The result shows that three basins in Libya contain 942 Tcf of risked shale gas in-place,with 122 Tcf as the risked,technically recoverable shale gas resource.In addition,the shale formations in these three basins also contain 613 billion barrels of risked shale oil and condensate inplace,with 26.1 billion barrels as the risked,technically recoverable shale oil resource.