SEGJ Technical Conference

Improvement of the seismic images through the optimized data processing flow for the 2D-airgun data acquired in the Tenpoku Seiho Oki site survey.

Abstract A site survey was carried out to investigate potential drilling hazards such as shallow gas pockets and anomalous geological structures in the Hokkaido Tenpoku Seiho Oki. The marine acoustic multichannel data acquired with airgun (GI gun) were essential information in the investigation and optimized relative amplitude preserving processing was carefully applied to the data in order to accurately detect anomalies related to the hazards. The processing includes various noise removals such as different kinds of multiple suppression and surface consistent amplitude recovery even for the marine data. As a result, the detectability of the anomalies, especially related to shallow gas pockets, could be improved significantly.