Publications

The low-frequency contribution in seismic data has several auspicious aspects starting from seismic processing to delivering the final product, and including further advanced processing and its subsequent interpretation. Specifically, some papers have stated that the benefits of the low-frequency component could improve signal penetration, resolution enhancement, and also assist in obtaining good inversion results. In Pertamina Hulu Energi ONWJ, where 2D marine seismic processing was performed in the Foxtrot South-East (F-SE) area, the authors faced an issue of limited low-frequency spectrum in the seismic data because of shallow tow streamers used in the acquisition. This condition makes it difficult for the authors to define the real basement layer of the Foxtrot South-East area, which is one of the primary targets besides a high-frequency image in the Talang Akar Formation (TAF). In order to resolve this problem, the authors chose to boost up the low-frequency component by using the receiver de-ghosting method. In general, this method is applied to attenuate ghost signals which are commonly recorded during a marine seismic acquisition. Followed by some specific parameters, it turned out that the processed seismic data, after we applied receiver de-ghosting, gives a clearer continuity image of the basement layer, which at first was only recognized as a noise signal. This finding will certainly be helpful for the next interpretation step for this area.