In geothermal energy, a huge energy potential lies in hydrothermal reservoirs close to magma where ultra-high temperature fluids (>450 $°$C) can be harnessed. Well casing system needs to be properly designed to ensure its integrity during its service lifetime. There currently exist neither any commonly accepted design tools nor standards regulating geothermal well design under such conditions. In this study a novel tool, Casinteg, was developed for structural analyses of geothermal wells. The tool is intended to bridge the gap between simplified analytic solutions and complex FE-based commercial software. The reliability and efficiency of the constitutive models implemented in Casinteg were verified in comparison with Abaqus. Casinteg's capability for structural analyses of full geothermal wells was preliminarily investigated, using IDDP-1 well as a case study. The calculated stress in the production casing was in a good agreement between Casinteg and Ansys models, while the computational time of Casinteg simulations was within minutes. Further developments are still needed. However, preliminary results were encouraging and have demonstrated the benefit of Casinteg for efficient structural analyses of full geothermal wells.

在地热能中，巨大的能量潜力存在于靠近岩浆的热液储层中，那里的超高温流体（> 450 $°$C）可以利用。井套管系统需要适当设计，以确保其使用寿命内的完整性。当前，在这种条件下，既没有任何公认的设计工具，也没有规范地热井设计的标准。在这项研究中，开发了一种新颖的工具Casinteg，用于地热井的结构分析。该工具旨在弥合简化的分析解决方案与复杂的基于FE的商业软件之间的鸿沟。与Abaqus相比，在Casinteg中实施的本构模型的可靠性和效率得到了验证。使用IDDP-1井进行了案例研究，初步研究了Casinteg对整个地热井进行结构分析的能力。Casinteg和Ansys模型在生产套管中计算出的应力非常吻合，而Casinteg模拟的计算时间在几分钟之内。仍然需要进一步的发展。但是，初步结果令人鼓舞，并已证明Casinteg可以对整个地热井进行有效的结构分析。