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Recovery of a target reflection underneath coal seams
This paper presents a strategy to recover a target seismic reflection of a potential gas reservoir immediately underneath a group of coal seams. First, a random noise attenuation technique, which is amplitude preserving, is applied to a stack section with usual low signal-to-noise ratio. Then, a stabilized inverse Q filtering technique is applied to correct for both phase and amplitude effects simultaneously. The latter can recover all the high-frequency components that are in principle recoverable and intelligently limit the attempt to compensate a given high-frequency wave component when its amplitude is attenuated to a level below the ambient noise level. As a consequence, the seismic bandwidth is increased and thereby the vertical resolution is enhanced so that the weak reflection of the target gas layer underneath the strong coal-seam reflections is clearly presented.
Recovery of a target reflection underneath coal seams
This paper presents a strategy to recover a target seismic reflection of a potential gas reservoir immediately underneath a group of coal seams. First, a random noise attenuation technique, which is amplitude preserving, is applied to a stack section with usual low signal-to-noise ratio. Then, a stabilized inverse Q filtering technique is applied to correct for both phase and amplitude effects simultaneously. The latter can recover all the high-frequency components that are in principle recoverable and intelligently limit the attempt to compensate a given high-frequency wave component when its amplitude is attenuated to a level below the ambient noise level. As a consequence, the seismic bandwidth is increased and thereby the vertical resolution is enhanced so that the weak reflection of the target gas layer underneath the strong coal-seam reflections is clearly presented.
Recovery of a target reflection underneath coal seams
Recovery of a target reflection underneath coal seams
Jian Guo (author) / Yanghua Wang (author)
Journal of Geophysics and Engineering ; 1 ; 46-50
2004-03-01
5 pages
Article (Journal)
Electronic Resource
English
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