AAPG GEO 2010 Middle East
Geoscience Conference & Exhibition
Innovative Geoscience Solutions – Meeting Hydrocarbon Demand in Changing Times
March 7-10, 2010 – Manama, Bahrain
Seismic Repeatability - Is There a Limit?
(1) CGGVeritas, Massy, France.
(2) Total, Pau, France.
The results of a 13-day seismic monitoring experiment are presented. It consists in 2 permanent piezoelectric sources, one cemented in depth and the other attached to a surface concrete pad and 28 sensors, 14 at the surface and 14 cemented below the weathering zone.
To enhance the signal-to-noise ratio, continuous averaging of the individual SP records is performed providing an average daily SP. 4D attributes are measured on these daily averages. The best repeatability is obtained when both sources and sensors are buried with time and amplitude variations of 6 μs and 0.5% respectively. This extremely high precision level is far above what can be expected from the most accurate surface acquisition methods currently available.