• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>Geothermal Resources Council Annual Meeting >The Feasibility of Utilizing Geothermal Energy from Supercritical Reservoirs in Iceland: A Progress Report on the Iceland Deep Drilling Project
【24h】

The Feasibility of Utilizing Geothermal Energy from Supercritical Reservoirs in Iceland: A Progress Report on the Iceland Deep Drilling Project

机译：利用冰岛超临界水库的地热能的可行性：冰岛深钻工程的进度报告

获取原文
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The Iceland Deep Drilling Project (IDDP) is a long-term program by a consortium of leading Icelandic energy companies to improve the economics of geothermal energy by producing supercritical hydrous fluids from drillable depths. Supercritical fluids have higher enthalpy than steam produced from two-phase systems. Large changes in physical properties near the critical point can lead to extremely high flow rates. A two year-long feasibility study in Iceland, that has just been completed, indicates that producing supercritical fluids is feasible, but will require drilling wells to depths of 3.5 to 5 km to reach temperatures of 450-600°C. Although drilling deep supercritical wells will cost in the range of USdollar 10 million each, modeling indicates that the power output from supercritical wells in favorable conditions should be 50 MWe, an order of magnitude greater than is usual from conventional geothermal wells. Iceland is a very favorable environment for this project as active rifting and volcanism provide the permeability and heat sources for a major geothermal industry. Very high heat flows within three currently producing high-temperature geothermal fields, at Nesjavellir, Krafla and Reykjanes, indicate that supercritical temperatures exist at drillable depths. Seismic activity continues to below 5 km in these geothermal fields, indicating that even at supercritical temperatures, the rocks are brittle and therefore likely to be permeable. Because of the high rain and snowfall, the Nesjavellir, Krafla geothermal systems produce very dilute fluids, whereas the Reykjanes system is recharged by seawater. If the IDDP is an economic success, this same approach could be applied in other high-temperature volcanic geothermal systems elsewhere, an important step in enhancing the economics of the geothermal industry worldwide.
机译：冰岛深入钻井项目（IDDP）是一家长期计划，由领先的冰岛能源公司的联盟，通过从可钻井深度生产超临界含水液来改善地热能的经济性。超临界流体具有比两相系统产生的蒸汽更高的焓。临界点附近的物理性质的大变化可能导致流量极高。刚刚完成的冰岛的两年长的可行性研究表明，生产超临界流体是可行的，但需要钻井井3.5至5km，以达到450-600°C的温度。虽然钻探深度超临界井，但在USDollar1000万的范围内，建模表明超临界井在有利条件下的功率应为50 mWe，大小大于传统地热井的常规。冰岛是这个项目的一个非常有利的环境，因为积极的裂化和火山主义为主要地热行业提供渗透率和热源。在Nesjavellir，Krafla和Reykjanes的三个目前生产高温地热田内的非常高的热流表明，在钻井深度处存在超临界温度。这些地热场的地震活动持续到5公里，表明即使在超临界温度下，岩石也很脆，因此可能是可渗透的。由于高雨和降雪，Nesjavellir，Krafla地热系统产生了非常稀释的液体，而雷克林系统由海水充电。如果IDDP是经济成功，这种方法可以应用于其他高温火山地热系统，这是加强全球地热产业经济学的重要一步。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号