Elastic Impedance Inversion of Multi-channel Seismic Data to Detect Gas Hydrate And Free-gas

Lu, Shaoming (The University of Texas) | McMehan, George A. (The University of Texas)



Gas hydrates and free-gas trapped beneath them contain a major untapped source of energy and so are of potential economic importance. However, the elastic properties of hydrated sediments are not well-known, which leads to inaccuracy in the evaluation of the amount of gas hydrates worldwide. We reprocess multi-channel seismic line BT-1 from the Blake Ridge off the east coast of North America to obtain migrated common-angle data sets, which are then inverted for elastic impedance. New algorithms are developed and evaluated to estimate P-impedance and S-impedance from the elastic impedance.