Advanced interpretation from integrated well and seismic data workflows
The pilot project's exploration approach in the Petrel platform integrated available data to deliver an advanced interpretation from which geoscientists could rapidly interpret, map, and model from basin to prospect scale. The vital connections of data to interpretation are preserved throughout the assessment into prospect generation. The correlation of primary sequences from logs generated in the Petrel platform was the basis for isochore maps that gave OIL a holistic view of the depositional pattern and geological setting.
An integrated seismic-to-well-tie study was completed, and the sonic data calibrated with the vertical seismic profile (VSP) data for conditioning before use. In consideration of the challenging acoustic impedance contrast, a combination of analytical (Ricker) and statistical wavelets was used to generate synthetic seismograms for key wells that made it possible to identify seismic events that were undifferentiated in initial studies.
Structural delineation was achieved with a computational combination of conventional and advanced seismic attributes. The patented ant tracking edge-detection method helped identify the main and minor fault systems, which were not readily visible on raw seismic.