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

COMPASS项目的灵感来自于全球通过向下扩大生产领域来提高地热资源利用的努力。在不需要扩建地面基础设施的情况下，通过钻入深而热的地层，可以提高能源输出。计算表明，在超高温条件下钻探的井的产量是常规井的5-10倍，可以显着减少所需的井数。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腐蚀性流体化学遇到。冰岛深度钻井项目（IDDP）的三口井中有两口已经钻完，但存在严重的套管失效问题。常规地热井套管失效的大量实例表明，目前主要从石油和天然气应用中转移过来的井概念几乎不足以用于地热利用。COMPASS将通过开发改进和创新的套管技术来应对这些挑战：为了减少套管失效，COMPASS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接箍一起工作，以减轻高温引起的应力，并确保井的完整性。-采用高性价比的激光熔覆技术，提高套管内部的防腐性能。这些技术的发展将通过强大的井设计解决方案得到加强，以应对挑战，降低项目风险并降低LCOE。新井概念将使新型地质环境和新区域的地热开发具有成本效益。COMPASS联盟包含了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。这种结合确保了知识和经验的交流、共享，以及新型造井技术在行业应用中的无缝转移，包括重要的公民技术

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