Imaging through gas-filled sediments using marine shear-wave data

Marine multicomponent sea-floor data of excellent quality have been acquire d over the Tommeliten Alpha field. The most dominating wave modes are inter preted to be conventional compressional PP-waves and converted PS-waves. Th e most important geophysical problem associated with the Tommeliten Alpha f ield is the presence of a gas chimney obscuring the conventional 3-D seismi c image of the reservoir zone. The converted PS-waves effectively undershoo t the gas chimney, leading to substantially improved images of the reservoi r. Subsequent interpretation indicates the Tommeliten Alpha structure is a faulted dome.