• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>Geothermal 2011;Geothermal Resources Council annual meeting >Temporal Velocity Variations beneath the Coso Geothermal Field Observed using Seismic Double Difference Tomography of Compressional and Shear Wave Arrival Times
【24h】

Temporal Velocity Variations beneath the Coso Geothermal Field Observed using Seismic Double Difference Tomography of Compressional and Shear Wave Arrival Times

机译：压缩和剪切波到达时间的地震双差层析成像技术观测到的Coso地热场下的速度速度变化

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

摘要

Microseismic imaging can be an important tool for characterizing geothermal reservoirs. Since microseismic sources occur more or less continuously both due to the operations of a geothermal field and the naturally occurring background seismicity, passive seismic monitoring is well suited to quantify the temporal variations in the vicinity of a geothermal field. We use microseismic data recorded between 1996 and 2008 to determine the temporally varying seismic velocity of the Coso geothermal field. In this study we will apply the double difference tomography method to simultaneously locate a suite of microseismic events and determine the compressional and shear wave velocity as well as their ratio. In a first step, we apply traveltime tomography based on the observed microearthquake catalog for every single year between 1996 and 2008 to obtain a first model for the subsurface velocities. In the next step we will estimate differential traveltimes using a cross-correlation technique. This allows us to apply double-difference tomography to refine our velocity models separately for each year. The double-difference method uses relative arrival times of earthquakes measured at the same station, which allows a more precise determination of the relative locations of earthquakes. In a final step, we plan to analyze temporal deviations from a reference model integrating the whole dataset between 1996 and 2008.
机译：微地震成像可能是表征地热储层的重要工具。由于微地震源由于地热场的运行和自然发生的背景地震活动而或多或少地连续发生，因此被动地震监测非常适合于量化地热场附近的时间变化。我们使用1996年至2008年之间记录的微地震数据来确定Coso地热场的随时间变化的地震速度。在这项研究中，我们将应用双差分层析成像方法同时定位一系列微地震事件，并确定压缩波和剪切波速度及其比率。第一步，我们根据观测到的微地震目录在1996年至2008年之间的每一年应用旅行时间断层扫描，以获取地下速度的第一个模型。在下一步中，我们将使用互相关技术估算差动行程时间。这使我们能够应用双差断层扫描来分别细化每年的速度模型。双差法使用在同一站点测得的地震的相对到达时间，从而可以更精确地确定地震的相对位置。最后，我们计划分析1996年至2008年间整合整个数据集的参考模型的时间偏差。

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