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oa Customized Injection Monitoring Solution Using PRM Technology
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, Third EAGE Workshop on Permanent Reservoir Monitoring 2015, Mar 2015, Volume 2015, p.1 - 3
Abstract
Octio has installed a permanent monitoring system at a waste injection site at the Oseberg field on the Norwegian continental shelf. This system comprises a small ocean-bottom seismic array of 4C stations, designed for both passive monitoring of microseismic events and active seismic surveys (see Lindgård and Matveeva 2013 and Løvheim 2013 ). The system was designed and installed in a Demo 2000 project supported by the Research Council of Norway and Statoil, and has provided real time data since its installation in 2013. The results from the first year of monitoring show that the system is able to characterize different passive energy sources from sub-hertz up to Nyquist frequency. These passive sources include weak regional earthquakes (M < 4.5) and microseisms from ocean wave oscillation (see Bjerrum et. al., 2014 ). During the summer 2014 a 4D baseline active survey was successfully conducted. The Oseberg installation is an example where a system is dedicated to injection monitoring over a limited area. The system will provide early warning for caprock integrity issues using passive and microseismic monitoring.