Using 3D Beam Q Migration For Imaging In The Presence Of Gas Accumulations In The Overburden

The presence of absorption anomalies in the overburden causes seismic images of the geological structures underneath to<br>suffer from resolution degradation, wavelet distortion and amplitude dimming, therefore reduces our ability to image and<br>interpret events inside the resulting “shadow zone”. Imaging in the presence of gas accumulations in the overburden has long<br>been recognized as a challenging problem, particularly in Southeast Asia where gas receives increasing exploration and<br>development attention. Thus, there is a need to compensate for the attenuation due to shallow gas.