Acquisition and processing challenges in continuous active reservoir monitoring

Abstract

A permanent system of reservoir monitoring has been installed on a gas storage field belonging to Gaz de France in the west of Paris. Because of the nature of the reservoir and the small saturation changes, the expected 4D seismic signal is extremely low. A new processing method taking advantage of the high temporal data redundancy is presented.

3D Seismic Survey Design, Second edition

“…Moreover, it is likely that far higher frequencies than usual can be achieved after repeated acquisition, as demonstrated for surface seismic data by Baeten and van der Heijden (2008). Nevertheless, even the buried-sources/ buried-receivers technique suffers from response variations due to the surface ghosts still traveling through the weathered layer (Bianchi et al, 2004).…”

Continuous Land Seismic Reservoir Monitoring of Thermal EOR in the Netherlands

“…Source ghost separation in the calendar domain 3. S-P converted wave mitigation by separation in the calendar domain (Bianchi et al, 2004), plus a high resolution 3D radon filter to remove residual linear waves 4. Weekly sliding median filter in the calendar domain to remove remaining ambient noise 5.…”

Steam Injection Seismic Monitoring Experiment

“…This system, called SeisMovie TM , is fully automated and remotely controlled (1) . This high-resolution seismic monitoring has the potential to optimize exploitation scenarios: tiny changes in the seismic response (a few microseconds and a few percents) can be measured and calibrated to direct reservoir measurements (2) . Survey planning Preliminary tests on the IZAUTE gas storage reservoir (in the south of France) have qualified the system repeatability.…”