Modifications to Passive Seismic Monitoring at Bayou Corne
In coordination with DNR and APOEP, Texas Brine is relocating sensors and adding additional resources to the passive seismic monitoring system already in place. This is part of an ongoing effort to monitor for tremors and pinpoint tremor locations with greater accuracy. The near-surface seismic stations at LA15 and LA16 will be decommissioned and moved to two new sites to improve the quality of the seismic monitoring data. These two new near-surface stations will also be deployed in 60 foot boreholes. The first station is approximately 600 feet NNW of station LA12 and a second site, located approximately 1700 feet east of the Oxy Geismar 3 cavern will be installed October 16-18.
In addition, a 4.5 Hz 3-component 963 ft deep seismic sensor was deployed in the new G-01 seismic monitoring well. This sensor will augment the surface monitoring effort, and is located approximately 600 feet east of the Oxy Geismar 3 cavern. An additional array of deep borehole sensors in G-01 seismic observation well installed at depths of 3000 feet and cemented into the salt will enhance the ongoing seismic monitoring effort in the Bayou Corne area.
As this work is performed, there may be periods when the seismic stations go offline. Efforts will be coordinated to ensure that all seismic activity will be monitored during this process.
The high-quality data gathered to date under the current system provides additional valuable information for monitoring the overall stability of the western end of the Napoleonville Salt Dome. The seismic data is used for predicting activity around the sinkhole and keeps response workers safe. New modifications will only enhance what has already been proven to be an effective seismic monitoring system. CERI remains involved and all the seismic data continues to be streamed to an on-line CERI Helicorder website.