The Postle Field
Which seismic techniques have you used that proved effective when experiencing issues detecting a target reservoir?
At the Postle Field in Oklahoma, USA, traditional P-wave seismic was unable to delineate channelized sandbodies. This was associated with sub-seismic resolution, low acoustic impedance contrasts to surrounding shales and high sandstone compressibilities (Fig. 1a).
To counter these challenges, geoscientists utilized two techniques that were successful:
- 4-D seismic acquisition before and after CO2 WAG miscible flooding. This technique revealed subtle P-wave amplitude anomalies associated with moving CO2 fronts by increasing the impedance contrast of the sandstone reservoir to surrounding shales.
- Shear wave data. This technique made it possible to image fine-scale sandstone reservoirs in some areas and the detection of thinner sands (Fig. 1b).
The Digital Analogue Knowledge System (DAKS™) contains a library of global oil and gas analogues that include seismic imaging. Use these analogues to benchmark your own field, and delve into C&C Reservoirs Reservoir Evaluation Reports to discover best practices from top performing reservoirs that can be applied to your own assets.
Book A Demo Today