Application of Full Waveform Inversion and Q-tomography for Earth Model Building - Shallow Water, Shallow Gas Case Study
G. Menzel-Jones, R. Petton, I. Anstey, P. Vasilyev, N.A. Mat Don Ya, M.M. Hor and D. Vigh
Event name: 77th EAGE Conference and Exhibition 2015
Session: Seismic Imaging - Case Histories I
Publication date: 01 June 2015
Info: Extended abstract, PDF ( 1.79Mb )
Price: € 20
Imaging below shallow gas bodies is one geophysical challenge encountered in offshore Southeast Asia basins. There are two key components in addressing this challenge: 1) the derivation of an accurate, high-resolution, geologically consistent velocity model and 2) compensating for the loss in signal strength and frequency bandwidth due to absorption of the signal as it propagates through the gas bodies. In this study, we present the application of FWI and Q tomography to a shallow-water, shallow-gas dataset from offshore Southeast Asia. We demonstrate the successful ability of FWI and Q tomography to resolve the low P-wave velocities and high attenuation of shallow gas bodies and subsequently compensate for the complex kinematics and absorption during depth migration.