A05 ONSHORE IMAGING THROUGH GAS USING CONVERTED SHEAR WAVES – CASE STUDY FROM ALGERIA Summary 1 Structural imaging of thrusted gas reservoirs is problematic with P-waves alone because of attenuation and scattering. Converted shear waves are significantly less affected by attenuation and scattering. However converted shear-wave data (PS) usually show a lower signal-to-noise ratio than compressional wave data (PP). Therefore the combination of PP and PS data quality is poor. The recording of the full 3C data also allows for directional filtering which partially suppresses crossline scattered energy present in PP data. A case study from Algeria confirms that PS


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