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Geothermal Power Generated from UK Granites (GWatt)

英国花岗岩产生的地热能（吉瓦）

基本信息

批准号：
NE/S004769/1
负责人：
Sabine Den Hartog
金额：
$ 66.21万
依托单位：
Heriot-Watt University
依托单位国家：
英国
项目类别：
Research Grant
财政年份：
2019
资助国家：
英国
起止时间：
2019 至无数据
项目状态：
已结题

来源：
https://gtr.ukri.org/projects?ref=NE%2FS004769%2F1
关键词：
Geothermal Power Generated UK Granites

项目摘要

Decarbonising power generation is a challenge for the UK, requiring an 80% reduction in greenhouse gas emissions by 2050, relative to 1990 levels. Carbon-free, renewable sources are attractive, but wind and solar generation are intermittent. In contrast, geothermally generated electricity is available all the time (i.e. is 'base load'). In the UK this can be developed with Engineered Geothermal Systems (EGS) whereby very hot water is accessed from depth via deep boreholes (4km or more) and is used to drive a turbine. Pioneering research has shown that permeable rocks (those through which fluid can flow) at depth are often associated with natural fracture systems. However, exploitation of the UK underground thermal resource has been held back by; 1) knowledge gaps about permeability and fluid/heat flow within the fractured hot rocks, and 2) a perception that the uncertainty associated with drilling problems or limited fluid flow from deep boreholes are too high for the potential financial reward. This project, Geothermal PoWer GenerATed from UK GraniTes (GWatt), seeks to address these barriers to uptake of EGS by:- Increasing knowledge of the geological conditions needed for deep fracture-controlled fluid flow within granitic rocks.- Developing a quantitative understanding of the heat resource and sustainability of the geothermal reservoir.- Constructing robust geological risk assessments based on well-established oil & gas uncertainty quantification and optimisation methods, with a view to reducing perceived risks.- Applying the integrated results of site-specific research to new geothermal exploration models for other granites, particularly those in SW England.A particular strength of GWatt is the link with the developing United Downs Deep Geothermal Power (UDDGP) project, an £18M, 2 borehole EGS in the Carnmenellis granite in Cornwall. This will provide a unique resource; downhole fluids, rock samples, geophysical logs, flow data and seismic data. GWatt will maximise the scientific potential from these data, and carry out innovative further analyses and interpretation, combining site-specific observations with regional studies and state-of-the-art uncertainty quantification, to address the challenges associated with EGS development within SW England. Other UK crystalline basement rocks show fracture-controlled groundwater flow, so the lessons learned from GWatt will ultimately benefit understanding of the rest of the UK deep subsurface.The project consortium comprises research, business and local government partners. The British Geological Survey, the University of Exeter Camborne School of Mines and Heriot Watt University provide complimentary skills in deep geothermal resource assessments, deep fracture fluid flow, rock/fluid interactions, reservoir modelling, detailed knowledge of the geology of SW England and the quantification of geological uncertainties. Geothermal Engineering Ltd. and Geoscience Ltd. are developing the UDDGP project and provide a wealth of experience delivering UK geothermal projects. Computer Modelling Group Ltd. will provide advanced heat and fluid flow modelling software. The Cornwall and Isles of Scilly Local Enterprise Partnership and Cornwall Council will facilitate outreach and dissemination activities, both to local people and the business community.Beneficiaries include local communities through the creation of EGS combined heat and power plants that will be important hubs for renewable energy networks, supplying carbon-free heat and power. The heat can be used for space heating, industrial drying, balneology, greenhouse heating, fish farms etc., all of which will generate local jobs. Local industry will also benefit from the regional scale uptake of EGS within SW England and a potential revival of the minerals industry arising from technological solutions to extracting metals from the deep geothermal brines.

脱碳发电对英国来说是一个挑战，到2050年，英国需要在1990年的基础上减少80%的温室气体排放。无碳的可再生能源很有吸引力，但风能和太阳能发电是间歇性的。相比之下，地热发电是随时可用的（即“基本负荷”）。在英国，这可以通过工程地热系统（EGS）来开发，通过深钻孔（4公里或以上）从深处获取非常热的水，并用于驱动涡轮机。开创性的研究表明，深层可渗透岩石（流体可以流过的岩石）通常与天然裂缝系统有关。然而，英国地下热资源的开发一直受到阻碍；1)关于裂缝性热岩的渗透率和流体/热流的知识差距；2)认为与钻井问题或深孔有限流体流动相关的不确定性太高，无法获得潜在的经济回报。该项目名为“英国花岗岩地热发电”（GWatt），旨在通过以下方式解决EGS吸收的这些障碍：增加对花岗岩深部裂缝控制流体流动所需地质条件的了解。-对地热资源和地热储层的可持续性进行定量了解。-基于完善的油气不确定性量化和优化方法，构建稳健的地质风险评估，以降低感知风险。-将特定地点研究的综合结果应用于其他花岗岩的新地热勘探模型，特别是英格兰西南部的花岗岩。GWatt的一个特别优势是与正在开发的联合唐斯深层地热发电（UDDGP）项目联系在一起，该项目耗资1800万英镑，在康沃尔郡的carmenellis花岗岩中建造了2个井眼地热发电系统。这将提供一个独特的资源；井下流体、岩石样品、地球物理测井、流动数据和地震数据。GWatt将从这些数据中最大限度地发挥科学潜力，并进行创新的进一步分析和解释，将特定地点的观察与区域研究和最先进的不确定性量化相结合，以解决与英格兰西南部EGS发展相关的挑战。英国其他结晶基底岩石显示裂缝控制地下水流动，因此从GWatt中吸取的经验教训最终将有助于了解英国其他深层地下岩层。该项目财团由研究、商业和地方政府合作伙伴组成。英国地质调查局、埃克塞特大学坎伯恩矿业学院和赫瑞瓦特大学在深部地热资源评估、深部裂缝流体流动、岩石/流体相互作用、储层建模、英格兰西南部地质的详细知识和地质不确定性的量化方面提供了互补的技能。地热工程有限公司和地球科学有限公司正在开发UDDGP项目，并为英国地热项目提供丰富的经验。计算机建模集团有限公司将提供先进的热和流体流动建模软件。康沃尔和锡利群岛地方企业伙伴关系和康沃尔议会将促进向当地人民和商界的宣传和传播活动。通过建立EGS热电联产电厂，受益者包括当地社区，这些电厂将成为可再生能源网络的重要枢纽，提供无碳的热能和电力。这些热量可以用于空间加热、工业干燥、温室加热、养鱼场等，所有这些都将为当地创造就业机会。当地工业也将受益于英格兰西南部EGS的区域规模吸收，以及从深层地热盐水中提取金属的技术解决方案带来的矿产工业的潜在复兴。