Studies of pore systems in volcanic rocks are of increasing importance due to these rocks' potential as reservoirs for hydrocarbons. For this paper, samples of basaltic pahoehoe, rubbly pahoehoe and acidic lava from the Lower Cretaceous Serra Geral Group (Paraná Basin, southern Brazil) were analysed in order to quantify and characterize the constituent pore systems. The Serra Geral Group volcanics were erupted as part of the Paraná‐Etendeka Igneous Province in the Early Cretaceous (Valanginian – Hauterivian). Analyses included experimental measurements by permo‐porosimeter integrated with X‐ray microtomography (μ‐CT) image analysis of vertical and horizontal sample plugs. In addition petrographic analyses were carried out to characterize pore types in thin section. The experimental porosity values ranged from 0.11 to 13.08% and most permeability values were generally lower than 0.0004 mD. Values varied as much within flow zones as they did between them.

中文翻译：

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火山岩中孔隙系统的定量和特征化：以巴西南帕拉纳盆地下白垩统塞拉岩群为例

由于火山岩具有作为碳氢化合物储层的潜力，因此研究火山岩中的孔隙系统变得越来越重要。在本文中，分析了来自下白垩统塞拉热拉尔集团（巴西南部帕拉纳盆地）的玄武岩，瓦砾和酸性熔岩样品，以定量和表征组成的孔隙系统。塞拉热拉尔集团的火山爆发是白垩纪早期（瓦朗吉尼－奥特里维安）的巴拉那－埃滕德卡火成岩省的一部分。分析包括通过渗透计与X射线显微断层扫描（μ-CT）图像分析对垂直和水平样品塞进行的实验测量。另外，进行了岩相分析以表征薄层中的孔隙类型。实验孔隙率值范围从0.11到13。08％且大多数磁导率值通常低于0.0004 mD。流动区域内的值变化与它们之间的变化一样大。