SEGJ Technical Conference

Challenges in processing and imaging of quasi-3D seismic data acquired in mountainous area - A case study in the Onikoube geothermal field-

Abstract An experimental quasi-3D seismic survey was conducted by JOGMEC in the Onikobe geothermal field, Miyagi, Japan. The survey area is located in mountainous area and which raised challenges in processing such as high variation of topography and irregularity and sparseness of seismic lines. We will introduce a case study of processing and imaging of such data. Our technique includes space variant time-term analysis, creating smoothed floating datum model for static correction, space-time variant angle mute for first break suppression and visualization of quasi-3D data for quality check. The processed data is imaged through pre-stack migration. Final result is integrated with velocity model estimated through 3D travel-time tomography and shows detailed and accurate structure of the survey area.