Structural and seismic facies analysis of Tytoolz-fiy Field, onshore Niger Delta

English Abstract:

Summary:

3D seismic cube from the Tytoolz-Fiy Field, was interpreted based on the reflection continuity, amplitude strength and internal configuration to understand the subsurface geology and depositional environment. This was integrated with the analysis of five well logs, and was carried out to ascertain and control the interpretation of the seismic facies analysis. A sequential workflow involving the identification and analysis of different seismic facies, generation of a synthetic seismogram and seismic attribute analysis was employed. Four seismic facies namely Facies A, B, I and T were identified and classified based on their reflection continuity, internal configuration and amplitude strength. The well log facies results were correlated and tied to the seismic facies analysis results and were used to infer the depositional environment - the delta front, delta plain and pro delta environments. Structural interpretation revealed the different fault systems, simple rollover anticlines and shale diapiric regions. Seismic attribute analysis was also carried out to identify regions of similar lithology and geomorphic features. This supported and aided the interpretation, especially to confirm the shale diapiric region.