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首页> 外文期刊>Brazilian Journal of Geology >Permian-Triassic maturation and multistage migration of hydrocarbons in the Assistência Formation (Irati Subgroup), Paraná Basin, Brazil: implications for the exploration model
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Permian-Triassic maturation and multistage migration of hydrocarbons in the Assistência Formation (Irati Subgroup), Paraná Basin, Brazil: implications for the exploration model

机译：巴西巴拉那盆地的Assistência组（Irati亚组）的二叠系-三叠纪成熟和油气的多阶段运移：对勘探模型的影响

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摘要

New lines of geological evidence strongly suggest that the main period of hydrocarbon maturation within Assistência Formation should be Permian-Triassic, stimulated by a high geothermal gradient that also sustained various manifestations of hydrothermal activity. Three main stages of fluid/hydrocarbon migration can also be inferred on the basis of multiscale observations: confined flow in late Permian to Triassic times, depending on the local build-up of fluid pressures; heterogeneous flow in Lower Cretaceous, triggered by a rejuvenated temperature gradient assisted by the early developed permeability conditions; and a late flow possibly driven by local pressure gradients, after complete cooling of dolerite dykes/sills. The early maturation and multistage migration of hydrocarbons have significant consequences in the design of exploration models to be applied in Paraná Basin.
机译：新的地质证据强有力地表明，在高地热梯度的作用下，Assistência组内烃成熟期的主要时期应为二叠纪-三叠纪，并维持各种热液活动。在多尺度观测的基础上，还可以推断出流体/碳氢化合物迁移的三个主要阶段：二叠纪晚期到三叠纪的封闭流动，这取决于局部的流体压力。下白垩纪的非均质流是由早期发育的渗透率条件辅助的回春温度梯度触发的;在完全冷却了白云石堤坝/基石之后，可能由局部压力梯度驱动的后期流动。碳氢化合物的早期成熟和多阶段运移对巴拉那盆地应用的勘探模型的设计具有重大影响。

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