Delineation and mapping of basement faults is important in hydrocarbon exploration and induced seismicity projects. In Alberta, basement faults have exerted influence on the depositional setting of sedimentary rocks of the Western Sedimentary Canadian Basin (WSCB). However, the basement roots for these faults may be vertical or near vertical and therefore could be difficult to image. Duplex-wave migration is an imaging tool used to map such vertical features. This synthetic modelling study aims at identifying different scenarios in which the duplex waves could be observable within existing datasets. Finite difference modelling of acoustic waves was used in creating the velocity model and shot records of the wave field of different scenarios. In addition, two field examples are taken from a deep crustal seismic profile acquired as part of the LITHOPROBE PRAISE program. The field geometry has a pattern suitable for the occurrence of the duplex wave energy. The Winagami Reflection Sequence interpreted as sill intrusions are strong sub horizontal reflections observed on the seismic profile. In order to enhance the stability of the process, a base sub horizontal reflection boundary should be specified. These basement features, if properly mapped can add more insights into the nature of fault reactivation and help in developing a tectonic model which could significantly improve predictive capabilities for induced seismicity risk assessment.
Presentation Date: Tuesday, September 17, 2019
Session Start Time: 1:50 PM
Presentation Start Time: 4:45 PM
Location: 304A
Presentation Type: Oral
