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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/S004262/1
负责人：
Christopher Rochelle
金额：
$ 79.6万
依托单位：
British Geological Survey
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%2FS004262%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项挑战，要求到2050年温室气体排放量相对于1990年水平减少80%。无碳、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，地热发电一直都是可用的（即“基本负荷”）。在英国，这可以通过工程地热系统（EGS）来开发，其中非常热的水通过深钻孔（4公里或更长）从深处进入，并用于驱动涡轮机。开拓性的研究表明，深层的渗透性岩石（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以下因素的阻碍：1）关于断裂热岩内渗透率和流体/热流的知识差距，以及2）认为与钻井问题或来自深钻孔的有限流体流相关的不确定性对于潜在的经济回报来说太高。这个项目，从英国花岗岩产生的地热发电（GWatt），旨在解决这些障碍吸收EGS的：-增加知识的地质条件所需的深部花岗岩控制流体流动的花岗岩。- 对地热储层的热量资源和可持续性进行定量了解。- 基于成熟的石油和天然气不确定性量化和优化方法构建稳健的地质风险评估，以期降低感知风险。- 将特定地点研究的综合成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）项目的联系，该项目是康沃尔Carnmenellis花岗岩中的一个价值1800万英镑的2孔EGS。这将提供独特的资源：井下流体、岩石样本、地球物理测井、流量数据和地震数据。GWatt将最大限度地发挥这些数据的科学潜力，并进行创新的进一步分析和解释，将特定地点的观测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。英国其他的结晶基底岩石显示出受地壳控制的地下水流，因此从GWatt中学到的经验教训最终将有助于了解英国深层地下的其他部分。该项目财团包括研究，商业和当地政府合作伙伴。英国地质调查局、埃克塞特大学坎伯恩矿业学院和埃里奥特瓦特大学提供深部地热资源评估、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的补充技能。Geekly Engineering Ltd.和Geoscience Ltd.正在开发UDDGP项目，并提供了丰富的英国地热项目经验。计算机模型集团有限公司将提供先进的热和流体流动模型软件。康沃尔和锡利群岛地方企业伙伴关系和康沃尔理事会将促进对当地人民和商业界的外联和宣传活动，受益者包括当地社区，办法是建立环境、商品和服务热电联产厂，这些热电联产厂将成为可再生能源网络的重要枢纽，提供无碳热电。热量可用于空间加热、工业干燥、浴室、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区域规模的EGS吸收，以及从深层地热卤水中提取金属的技术解决方案所带来的矿产业的潜在复兴。