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阿根廷的圣·乔治(San Jorge)盆地位于巴塔哥尼亚高原的中心,横跨于Chubut和SantaCruz省南部,自1907年始就一直生产石油天然气。目前该地区的产量占国家总产量的32％。盆地的目前情况和早期地质演化与早侏罗纪大西洋开裂具有相同的断裂过程。随着断裂的发育产生了大的直接断层和局部侵蚀,以非海相陆生为主的堆积物完好地沉积在早白垩地层中。在这一点上,安第斯山区域构造作用变成沉积柱中火山灰聚集的一个主要来源;它也造成了浸透性的岩基侵入。在油气生成区,碎屑沉积以湖成和漫滩成因的厚页岩层为特征,并且有许多较薄的横向上疏松的砂体(油藏)。
Located in the heart of the Patagonian Plateau, across the Chubut and the southern province of SantaCruz, Argentina’s San Jorge basin has been producing oil and gas since 1907. At present, the region’s output accounts for 32% of the country’s total output. The current status of the basin and the early geological evolution have the same fracture process as the Early Jurassic Atlantic cracking. With the development of faults, there are large direct faults and local erosions. Deposits dominated by non-marine terrestrial deposits are well deposited in the early chalk formation. At this point, the tectonic andean area became a major source of volcanic ash accumulation in sedimentary columns; it also caused the infiltration of infiltrated rock formations. In the hydrocarbon generation area, clastic sediments are characterized by thick shale formations of lake and floodplain formations and many thinner laterally loose sand bodies (reservoirs).