• 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 >Seismic Evidence for a Long-Lived Enhanced Geothermal System (EGS) In the Northern Geysers Reservoir
【24h】

Seismic Evidence for a Long-Lived Enhanced Geothermal System (EGS) In the Northern Geysers Reservoir

机译：在北息山水库中长期增强地热系统（EGS）的地震证据

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

摘要

Historic Geysers earthquake and injection data show an area of approximately 8 km~(2) underlain by a cluster of injection-induced microearthquakes (MEQs) in the depth range 3 to 5 km below sea level (bsl). The cluster lies far below the normal 240°C isothermal reservoir and in the underlying High Temperature Zone (HTZ), where temperature gradients can exceed 100°C per km. This deep cluster has existed, more or less in its current form, since 1976 or earlier. Above the cluster is a gap, 0.5 to 1 km thick, where few MEQs occur. Above the gap is a more typical pattern of Geysers seismicity, including plumes of MEQs associated with injection wells. A conceptual model shows that this pattern could be governed largely by the temperature contrast between injected water and the rock, and implies that significant volumes of injected water have descended into the HTZ, reaching depths as great as 5 km bsl. In this part of the field, there is also a long history of production of flashed injectate (as evidenced by geochemical studies). Thus the interpreted deep injectate flow through the HTZ may have contributed significantly to the prolonged productivity of this part of the reservoir. Overall, the results indicate that for much of the history of the northern Geysers field, injection has created and maintained an Enhanced Geothermal System (EGS) that has been making a valuable contribution to production and sustainability. This success offers the promise of expanded development, and redevelopment, of marginal field areas which otherwise might be uneconomic.
机译：历史间歇泉地震和注射的数据显示的约8公里的区域〜（2）通过在深度为3〜5公里海平面以下（BSL）注射诱导的微震（MEQs）的簇下伏。群集位于远低于正常240℃等温储器和在底层的高温区（HTZ），其中温度梯度可以每公里超过100℃。这种深层集群已经存在，或多或少地在其目前的形式，自1976年或更早。群集上面是一个间隙，0.5 1公里厚，其中少数MEQs发生。上方的间隙是间歇泉地震活动，包括与注入井相关联的MEQs羽状更典型的图案。概念模型显示，这种模式可以很大程度上是由注入水和岩石之间的温度反差管辖，并暗示注入水显著量已经下降到HTZ，达到深度一样大5公里BSL。在现场的这部分，也有生产亮出注射剂的悠久历史（由地球化学研究证明）。因此，解释深注射液流过HTZ可以显著到贮存器的这一部分的延长生产率作出了贡献。总的来说，结果表明，对于许多北间歇泉场的历史，注入已创建和维护一直在生产和可持续发展作出了宝贵贡献的增强型地热系统（EGS）。这一成功提供扩展的开发和再开发，否则可能是不经济的边际油田地区的承诺。

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