Pakistan Journal of Geology (PJG)

Journal: Pakistan Journal of Geology (PJG)
Author: Ayodele O. Falade, Olubola Abiola, John O. Amigun

This is an open access journal distributed under the Creative Commons Attribution License CC BY 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited

DOI: 10.26480/pjg.01.2025.05.11

This study integrated amplitude and frequency-based post-stacked seismic attributes to delineate hydrocarbon prospects in the study area. The research aimed to achieve a comprehensive reservoir characterization by utilizing five well log suites, check shot, and seismic data. Two primary lithologies, sand and shale, were delineated from the well log data, and three reservoirs of significant thickness, intersecting the available well logs, were identified. Using synthetic seismograms and check shot data, a seismic-to-well tie was performed, aligning the well logs with the seismic section to facilitate the extraction of horizon time slices corresponding to the tops of the identified reservoirs for seismic attribute analysis. Seismic attributes that are a function of the amplitude (instantaneous amplitude), frequency (instantaneous frequency) and both (amplitude envelope) identified to be a direct hydrocarbon indicator were extracted and used for the analysis to obtain information about the hydrocarbon potential of the field. Horizon time slices for the three reservoirs were generated across all three attribute maps, allowing for the identification of zones indicative of hydrocarbon presence. Areas characterized by high instantaneous amplitude, low instantaneous frequency, and high amplitude envelope were highlighted and encircled as hydrocarbon prospects. The results reveal that the field demonstrates significant hydrocarbon potential based solely on amplitude and frequency-based seismic attributes.