Geotools™ is a modern, interactive platform for the analysis of magnetotelluric (MT) and controlled source audio magnetotelluric (CSAMT) data. Continuously expanded and carefully maintained, Geotools offers a complete analysis workflow for your data — from QC, editing and 1D inversion modeling all the way to 3D inversion modeling on the Viridien Cloud.
This is the decree to implement the 1999 petroleum code.
Evaluate Petroleum Systems to Identify New Exploration Opportunities
Least-squares depth migration approximates the inverse of the forward modeling. We show two real data applications of a single iteration (non-iterative) Kirchhoff least-squares depth migration process, generically referred to as migration deconvolution, to highlight the benefits of this process. Our first example demonstrates improved amplitude behavior of least-squares migration deconvolution images in an offshore Gabon data set. In the second example we propose an efficient way to include attenuation in the least-squares migration process and, using a Central North Sea data set, highlight a stable uplift in both resolution and illumination of the final image.
Four recent case studies document how an advanced seismic workflow, which integrates geoscience data, enables operators to enhance their reservoir characterization interpretation.
The North West Shelf of Australia is a prolific hydrocarbon province hosting significant volumes of hydrocarbons, primarily derived from Jurassic and Cretaceous targets. A new regional, integrated geoscience study has been undertaken by CGG to develop new insights into the paleogeography and petroleum systems of Late Permian to Triassic successions which have historically been underexplored in favour of Jurassic to Cretaceous targets. This comprehensive analysis from a paleogeographic and petroleum system perspective provides a basin evaluation tool for Triassic prospectivity.
The Campos Basin, offshore Brazil, features complex shallow geology in the forms of pronounced seabed canyons and paleo-canyons. The rapid variations in the velocity field due to these complex shallow geologic features can be difficult for ray-based tomography techniques to resolve, resulting in distorted images in deeper section. Full waveform inversion (FWI) is able to utilize the recorded diving–wave energy to resolve the high-resolution velocity model in these geologically complex areas. Additionally, dip-constrained non-linear slope tomography introduces dip constraints to ray-based residual move-out tomography and is able to capture small-scale velocity anomalies associated with these shallow heterogeneities. A combined workflow of FWI and dip-constrained tomography enabled Chevron to build accurate and detailed velocity models in the Campos Basin, resulting in fewer seismic image distortions. We demonstrate the method using a Campos Basin, Brazil narrow-azimuth streamer dataset.
To help the industry identify new and previously overlooked prospects in Australia’s Gippsland Basin, CGG acquired a new basin-scale 3D seismic multi-client survey in 2020.