Improved Reservoir Delineation in Complex Geological Settings Using CLSSA: a Case Study from Offshore Nova Scotia

The study undertakes the demonstration of Constrained Least Squares Spectral Analysis (CLSSA) as tool for delineating and characterizing reservoir zones while establishing it as an evolving frontier Fourier approach to spectral decomposition via a case study example with a brief review of the model behind CLSSA. It displays the efficiency of CLSSA in imaging and characterizing reservoir zones, thin layers, structures such as faults and complex stratigraphic features such as reefs. The results are also contrasted against the conventional Short Time Fourier Transform (STFT) which consequently appears to be incompetent against CLSSA. This investigation also illuminates details about the hydrocarbon prospect of the Penobscot Bay region, offshore Nova Scotia and shows that the well missed the actual target carbonate reef structure which appears distinctly at an anomalously low frequency (ALF) of 5Hz in the CLSSA section while STFT fails to resolve it. Further, it also signifies the robustness of CLSSA to clearly resolve and illuminate features of interest in complex siliciclastic and carbonate settings. It thus, offers high resolution and localization holds immense prospect to quantitatively assess tuning thickness of beds.