Abstract:
Seismic stratigraphy analyzes the geological concepts of stratigraphy by identifying the seismic reflection termination patterns that may record stratal terminations such as onlaps, downlaps, erosional truncations, and toplaps. It is a common tool in the assessment of source reservoir and seal rocks during petroleum system analysis in a basin. However, identifying the reflection termination patterns on seismic sections line-by-line is a time-consuming task. This study demonstrates a new workflow for picking sequence-bounding surfaces semi-automatically using seismic waveform, acoustic impedance, and porosity attributes. During this study, the workflow started with a process of selecting seismic attributes, followed by a manual interpretation of sequence boundaries on key seismic lines. The key lines are treated as control points for the semi-automatic seismic interpretation. Finally, the sequence boundaries are semi-automatically picked by finding the shortest path defined by multiple seismic attributes. To test the effectiveness of this workflow, I used a 3D seismic data set acquired over the Dutch sector of the North Sea. The workflow successfully traced the sequence boundaries between manually interpreted horizons.
