Newberry Seismic Deployment Fieldwork Report

Wang, J ; Templeton, D C

关键词: CONCRETES;    DETECTION;    DIGITIZERS;    EARTHQUAKES;    GEOTHERMAL SYSTEMS;    LAWRENCE LIVERMORE NATIONAL LABORATORY;    MICROEARTHQUAKES;    PROCESSING;    SEISMIC DETECTORS;    SENSORS;    STIMULATION;   

DOI  :  10.2172/1047774
RP-ID  :  LLNL-TR-541932
PID  :  OSTI ID: 1047774
Others  :  TRN: US201216%%700

美国|英语

来源: SciTech Connect

【 摘 要 】

This report summarizes the seismic deployment of Lawrence Livermore National Laboratory (LLNL) Geotech GS-13 short-period seismometers at the Newberry Enhanced Geothermal System (EGS) Demonstration site located in Central Oregon. This Department of Energy (DOE) demonstration project is managed by AltaRock Energy Inc. AltaRock Energy had previously deployed Geospace GS-11D geophones at the Newberry EGS Demonstration site, however the quality of the seismic data was somewhat low. The purpose of the LLNL deployment was to install more sensitive sensors which would record higher quality seismic data for use in future seismic studies, such as ambient noise correlation, matched field processing earthquake detection studies, and general EGS microearthquake studies. For the LLNL deployment, seven three-component seismic stations were installed around the proposed AltaRock Energy stimulation well. The LLNL seismic sensors were connected to AltaRock Energy Gueralp CMG-DM24 digitizers, which are powered by AltaRock Energy solar panels and batteries. The deployment took four days in two phases. In phase I, the sites were identified, a cavity approximately 3 feet deep was dug and a flat concrete pad oriented to true North was made for each site. In phase II, we installed three single component GS-13 seismometers at each site, quality controlled the data to ensure that each station was recording data properly, and filled in each cavity with native soil.