Approaching Seismology in the Source: Duke Participation in SAFOD Pilot Hole Science

[20886 . 196]有了这份合同，杜克大学的地震学小组将参与对SAFOD先导井收集的被动和主动地震数据的协同分析。该小组的研究将包括对近井断层和速度结构的调查，利用这种结构改善地震位置，研究地震到接收器的路径效应和震源效应。该小组参与这项研究是基于他们以前在SAFOD地点的结构和地震学方面的工作，以及他们参与开发SAFOD项目的钻孔仪器。他们提案中的主动地震剖面部分与怀俄明大学的一项免费提案（推荐资助）相关联。杜克大学的研究小组将对先导井进行测量：1)一串3分量的12赫兹地震仪；2)安装在套管底部的高灵敏度、大动态范围、3分量2 Hz地震仪。地震阵列串和2hz地震仪是与石油勘探仪器公司合作开发的。新的套底地震仪、地震阵列和压力监测系统将提供独特的3维和4维（深度和时间）、谱含量和体积应变信息，这些都是SAFOD主井的目标

0208196MalinWith this award, Duke's seismology group will participate in the collaborative analyses of the passive and active seismic data that will be collected in the SAFOD Pilot Hole. The group's research will include investigations of the near-borehole fault and velocity structure, improved earthquake locations using this structure, studies of earthquake-to-receiver path effects and earthquake source effects. The group's participation in this research is based on their previous work on the structure and seismology of the SAFOD site and their involvement in development of borehole instruments for the SAFOD program. The active seismic profiling portion of their proposal is linked to a complimentary proposal (recommended for funding) by the University of Wyoming.The Duke Univ. group will instrument the Pilot Hole with: 1) a multilevel string of 3-component 12 Hz seismometers; 2) a high sensitivity, large dynamic range, 3-component 2 Hz seismograph, installed at the bottom-of-casing. The seismic array string and 2 Hz seismograph have been developed in collaboration with oil-exploration instrumentation companies. The new casing-bottom seismograph, seismic array string, and pressure monitor system will provide unique 3rd and 4th dimension (depth and time), spectral content and volumetric strain information on the microearthquakes that are the targets of the main SAFOD hole.***