Sustainable and cost-efficient Concepts enabling green power production frOM suPercriticAl/Superhot geothermal wellS (COMPASS)

COMPASS项目的灵感来自全球努力通过向下扩大生产领域来改善地热资源的利用。在不需要扩大地面基础设施的情况下，可以通过钻到深部和热地层中来提高能量输出。计算表明，在超热条件下钻探的威尔斯井的产量将比常规井高5-10倍，这可以显著减少所需的威尔斯井的数量。实现这一目标的主要挑战与井的完整性有关;由于极端的温度变化和遇到的腐蚀性流体化学。冰岛深钻项目（IDDP）的三口威尔斯井中有两口已经钻完，但存在严重的套管失效问题。常规地热威尔斯井中套管损坏的大量实例表明，主要从石油和天然气应用转移的当前井概念几乎不足以用于地热用途。COMPASS将通过开发改进和创新的井套管技术来应对这些挑战：-为了减少套管失效，将开发适用于高温地层的新型泡沫水泥解决方案。该系统将与现有的柔性联轴器一起工作，以减轻高温引起的应力并确保井的完整性。- 将使用具有成本效益的激光熔覆来改善套管内的腐蚀防护。这些技术开发将通过强大的油井设计解决方案来加强，以应对挑战，降低项目风险并减少LCOE。新的井概念将在新类型的地质环境和新地区实现具有成本效益的地热开发。COMPASS联盟包含一个由主要地热研究机构和领先行业参与者组成的多元化团队。这种结合确保了交叉交流，知识和经验的分享，以及通过行业应用，包括重要的公民，

The COMPASS project is inspired by global efforts to improve utilization of geothermal resources by enlarging production fields downwards. Energy output can be enhanced, without the need to expand surface infrastructure, by drilling into deep and hot formations. Calculations indicate that wells drilled into superhot conditions will yield 5-10 times more than a conventional well which can significantly reduce number of wells required. The main challenges to achieve this are related to the well integrity; due to extreme temperature changes and corrosive fluid chemistry encountered. Two of three wells in the Iceland Deep Drilling Project (IDDP) have already been drilled and had serious problems with casing failures. Numerous examples of casing failures in conventional geothermal wells show that current well concepts, mainly transferred from oil and gas applications, are barely sufficient for geothermal use. COMPASS will address these challenges by developing improved and innovative well casing technologies: -To mitigate casing failures, novel foam cement solutions will be developed suitable for high temperature formations. This system would work with available flexible couplings to mitigate high-temperature induced stresses and ensuring well integrity. - Cost-effective laser-cladding will be used to improve corrosion protection inside the casing pipes. These technology developments will be enhanced with a robust well design solution addressing challenges, reducing project risk and enabling reduction of LCOE. The new well concept will enable cost-effective geothermal developments in new types of geological settings and new regions. The COMPASS consortium contains a diverse team of major geothermal research institutes and leading industry players. This combination ensures cross-fertilisation, sharing of knowledge and experience, and seamless transfer of the novel well construction technologies by industry application, including significant citizen e