Update: Horn River Seismicity-Monitoring Array in British Columbia
Nanometrics has been awarded the contract to install and manage a turnkey seismic network in the Horn River Basin. The purpose of the project is to better understand the effects of hydraulic fracturing in the area. The Nanometrics seismic network will help the project partners and operators to distinguish between natural and induced seismicity. Geophones have been traditionally used to measure vibrations in these applications, but they lack the low frequency performance and low self-noise required to detect smaller events over larger areas. The Trillium Posthole was chosen for this project because it is a much more sensitive instrument with lower detection thresholds and less overall cost of deployment.
Permitting for the network was completed in late February, leaving a very short window of opportunity to install the stations before the spring breakup. Nanometrics seismic engineering work crews completed the installation within three weeks, installing the network in the sub-surface muskeg, an ever-challenging topography. The remote site design was very challenging as adequate support had to be provided for the VSAT antenna and a system designed to economically install the posthole seismometer below the permafrost. A stable platform was built on four 20ft screw pile footings to support the VSAT antenna, solar systems and batteries. A fifth, 25ft deep screw pile was used as a "borehole" for the Trillium 120 Posthole seismometer.
The real-time data from this network is sent via Libra VSAT to the Geological Survey of Canada, Sidney, BC, for processing and further distribution to the IRIS Data Management Center.
BC Oil & Gas is excited to deploy these world-class seismometers, which have successfully and consistently delivered real-time critical seismic data in national networks located in some of the world’s harshest environments. These gold standard instruments have been the preferred choice of world-renowned seismological organizations, such as USGS and IRIS/PASSCAL.
See original Press Release for more details.
Stay tuned for the next Update…
Apr 23, 2013