Geoconvention 2019: Best Paper Award
Celebrating the best of GeoConvention 2019 At the Sixth Annual Best of GeoConvention at ConocoPhillips Theater, Calgary, Alberta, December 11, 2019, Andrea Crook was presented with the “Best Paper” Award. The Award was presented for the talk given on Transitioning to High Density Vibroseis – a Case Study. View All Winners View Case Study
Transitioning to High Density Vibroseis Seismic Acquisition: A Case Study
Andrea Crook OptiSeis Solutions Ltd. Rob McGrory, Nathan Baker, & Adam Westlake, Crescent Point Energy Summary In general, seismic acquisition in the Western Canadian Sedimentary Basin (WCSB) has been conducted using primarily explosive sources, whereas vibroseis acquisition has been limited to areas with relatively flat topography. With the recent advances in seismic acquisition and processing […]
Simultaneous Source vs. Regular Vibroseis Acquisition – A Direct Comparison
By Andrea Crook, P.Geoph. Summary Simultaneous source acquisition has proven to be effective at increasing trace density without incurring significant increases in seismic acquisition cost. As a result, most simultaneous source datasets have significantly higher trace density than previous datasets requiring decimation of the simultaneous source dataset or interpolation of the regular dataset to effectively […]
Seismic Acquisition Innovations
By Andrea Crook, P.Geoph. Over the past 10 years, land seismic acquisition has changed significantly. Nodal/cable-less systems have broadly replaced cabled systems, vibroseis sources have replaced explosive sources even in areas with difficult terrain, and high-density seismic programs are becoming commonplace. This article, based on the Chief Geophysicists Forum presentation “Top 5 Innovations in Geophysical […]
Cost-Effective Seismic Exclusion Zone Mitigation Using Optimal Station Prediction (OSP) Method
By Andrea Crook, P.Geoph. For large seismic exclusion zones affecting numerous source and/or receiver stations, should all the stations within the exclusion be skidded or offset around the edges of the exclusion, or should select stations that provide the most geophysical and economic value be used instead? How do we quantify station value? Is it […]
Land Seismic Acquisition Testing Strategies and Results – Southern Chad, Africa 2013-2015
By Andrea Crook, P.Geoph., Paul Stephenson, and Chaminda Sandanayake Over the past four years, Glencore has acquired four 3D seismic surveys covering 1200 km2, 216 2D seismic lines covering 4500 km and twenty-three seismic acquisition tests in Chad (Figure 1). Seismic acquisition testing provided tremendous benefit by improving subsurface imaging, increasing operational efficiency and reducing […]
Optimal Restriction Modeling: A New Approach to Station Positioning
By Keith Millis, Cameron Crook Summary Surface restrictions to seismic acquisition increasingly limit the ability to place stations at their theoretical locations. Consequently, the acquisition design process is faced with increased pressure to model programs with surface perturbations in mind (Cooper, 2004). An optimal restriction modeling method requires reshaping the surface design process to one […]
Optimal Restriction Modeling
By Keith Millis, Case Caulfield, and Andrea Crook, P.Geoph. Restrictions to seismic acquisition increasingly limit the positioning of both sources and receivers at theoretically prescribed locations. Designing and subsequently repositioning station locations with respect to those restrictions has become an important and time-conscience aspect of both land and marine seismic programs. Historically, deviations from theoretical […]
The Benefits of Receiver Infill Stations: A Technical and Operational Case Study
By Keith Millis Summary Surface restrictions to seismic acquisition pose an increasingly complex challenge to imaging desired targets. Some surface restrictions are time variant and require the acquisition team to be highly adaptable and responsive to changing conditions. There are aspects to nodal systems that can enhance this adaptability. Discussions on the benefits of nodal […]