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率的努力。在不需要扩大地面基础设施的情况下，通过钻探深部和高温地层，可以提高能源输出。计算表明，在过热条件下钻入的井产量将是常规井的5-10倍，这可以显着减少所需的井数。实现这一目标的主要挑战与油井完整性有关；这是由于极端的温度变化和遇到的腐蚀性流体化学。冰岛深井钻探项目(IDDP)的三口井中有两口已经钻井，存在严重的套管损坏问题。许多常规地热井套管损坏的例子表明，目前的井概念主要是从石油和天然气应用中转移出来的，几乎不足以用于地热用途。Compass将通过开发改进和创新的油井套管技术来应对这些挑战：-为减少套管损坏，将开发适合高温地层的新型泡沫水泥解决方案。该系统将与可用的柔性联轴器一起工作，以减轻高温引起的应力，并确保良好的完整性。-将使用具有成本效益的激光熔覆来改善套管内的防腐性能。这些技术开发将通过一个强大的井设计解决方案来加强，以应对挑战，降低项目风险，并能够减少LCOE。新的井概念将使新类型的地质环境和新地区的地热开发具有成本效益。COMPASS财团包括一支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受精、知识和经验的共享，以及行业应用对新型油井施工技术的无缝转让，包括重要的公民e

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