阿根廷重点盆地油气资源潜力评价

阿根廷油气资源丰富,自北向南发育库约、内乌肯、圣豪尔赫和奥斯特勒尔4个含油气盆地,其构造演化可分为裂谷前基底、裂谷期、后裂谷沉降期和安第斯前陆期。圣豪尔赫盆地受安第斯造山运动影响较小,构造受控于断陷期和坳陷期形成的各类圈闭,其余三个盆地构成次安第斯弧后前陆盆地群南段,受安第斯造山运动影响较大。库约盆地以裂谷期烃源岩为主,其余3个盆地以热沉降期海相泥岩和碳酸盐岩为主,同期沉积地层为主要成藏组合。储层以碎屑岩为主,内乌肯盆地发育少量碳酸盐岩储层;四个盆地陆上油气发现程度均较高,圣豪尔赫盆地海域和深层仍具有较大的勘探潜力;内乌肯盆地页岩油气资源丰富,潜力巨大,将成为未来的勘探热点。

Evaluation of hydrocarbon resource potential in key basins of Argentina

Hydrocarbon resource potential in Argentina is great,from north to south there are four basins developed,namely Cuyo,Neuquen,San Jorge and Austral basins.The tectonic evolution can be divided into basement period before rifting,rifting period,post rifting subsidence period and Andean foreland period.Less affected by the Andean orogeny,San Jorge basin is controlled by various traps formed in fault depression and depression periods.Greatly influenced by Andean orogeny,the rest three basins form the southern part of basin groups of Sub-Andeans retro arc foreland basin.The hydrocarbon source rocks of Cuyo basin is given priority to rifting period,the rest three basins are given priority to Marine mudstone and carbonate rock in thermal subsidence period,and sedimentary strata over the same period act as the main accumulation combination.Reservoirs are given priority to clastic rock and small amounts of carbonate reservoir are developed in Neuquen basin.The discovery degree of four basins is higher,great potential is in the sea area and deep waters of San Jorge basin.The resources of shale oil &gas are rich in Neuquen basin and it may become the hotspot for future exploration.