The numerical modelling of flows in geologic porous media, accounting for plastic behaviour of rocks at high temperatures and hydrofracturing at high fluid pressures, is required for a better understanding of hydrothermal and volcanic systems. The investigation of these systems is limited given the lack of reliable and available reservoir simulation software that accounts for complicated rock behaviour at elevated temperatures. In this paper, we present such software as an extension of the MUFITS reservoir simulator. We describe the mathematical model utilised for modelling the permeability changes of elastic and plastic rocks and input data formats to the simulator. We present several application examples related to the modelling of brittle–ductile transition in hydrothermal systems, in particular perturbed with the emplaced degassing magma body, and provide the corresponding simulator input data to facilitate and ease its further usage.

中文翻译：

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使用MUFITS模拟器进行脆性-延性转变的数值建模

为了更好地了解热液和火山系统，需要对地质多孔介质中的流动进行数值模拟，考虑到高温下岩石的塑性行为和高流体压力下的水力压裂。由于缺乏可靠和可用的油藏模拟软件来解决高温下复杂的岩石行为，因此对这些系统的研究受到限制。在本文中，我们介绍了MUFITS油藏模拟器的扩展软件。我们描述了用于对弹性和塑性岩石的渗透率变化进行建模的数学模型，并向模拟器输入了数据格式。我们提供了几个与热液系统中的脆性-延性转变建模有关的应用示例，尤其是受到了脱气岩浆体的扰动时，