Schlumberger

Deepwater Pre-Drill Inversion Studies

Innovative modeling techniques for 3D seismic data

Acoustic and elastic inversion, rock physics analysis, and reservoir property modeling are essential in early planning of deepwater operations.

Forward-plan safe and efficient well trajectories and landing locations

The objective of seismic inversion is to generate a description of subsurface elastic rock properties from recorded seismic data (2D or 3D).  Inverse modeling techniques can be applied to both pre- and post-stack data. Post-stack data do not provide the information with which to resolve compressional wave velocity and formation density separately. However, pre-stack angle-dependent reflected waves offer the ability to deliver a more robust description of lithology and fluid content. Inversion techniques can be applied to multicomponent and multi-azimuth seismic surveys. Seismic inversion deliverables include acoustic and elastic impedance cubes; compressional velocity, shear velocity, and density cubes; and a wide range of associated seismic attributes.

High-resolution earth models can be constructed using 3D prestack acoustic full waveform inversion (FWI). FWI uses forward modeling to compute the differences between the acquired seismic data and the current model, and a process similar to reverse time migration of the residual dataset to compute a gradient volume and to update the velocity model.

Results from seismic inversion are used to forward-plan safe and efficient well trajectories and landing locations.

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FWI Accurately Images Complex Reservoir

FWI enhances resolution in velocity model
3D prestack acoustic full-waveform inversion (FWI) uses the two-way wave equation to produce high-resolution velocity models. Visit Full Waveform Inversion Services page

Combine PP and PS Data for Different Inversion Goals

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