Elastic FWI (E-DMFWI)
TGS Dynamic Matching Full Waveform Inversion (DM FWI) workflow is a versatile solution with a proven record on various survey geometries and geological settings. The increased physics in E-DMFWI represents the next step in subsurface imaging: it significantly improves the focusing of velocity interfaces with strong contrast, resulting in improved imaging underneath complex structures.

E-DMFWI: Superior Results in Legacy and Modern Acquisition
Dynamic Matching FWI (DM FWI) has become the key algorithm in modern workflows to derive high-resolution velocity models. Benefiting from superior wavefield propagation physics in geologically complex areas, Elastic Dynamic Matching FWI (E-DMFWI) can produce accurate velocity models with greatly improved resolution compared to acoustic algorithms.
- The elastic implementation of the TGS DM FWI workflow combines the proven algorithm's versatility with superior physics.
- It enhances subsurface imaging underneath complex structures by capturing full elastic wavefield physics, including mode conversions.
- Preferred choice for superior resolution and accuracy in complex geological settings, like salt bodies and fault-dominated zones.
- Increases sensitivity to near-surface variations, aiding in shallow hazard detection and minimizing the need for residual statics corrections.
- Delivers more reliable AVO response by accurately modeling elastic effects and wave mode interactions.
Improved Physics for a Trusted and Versatile Solution
Due to the elastic nature of the earth, Elastic Dynamic Matching FWI (E-DMFWI) has intrinsic advantages over the acoustic version, especially in geologically complex areas. The elastic wave equations can simulate both compressional (P waves) and shear waves (S waves), capturing more detailed information about the subsurface. TGS E-DMFWI algorithm achieves superior results in diverse complex geological settings and survey geometries, improving reservoir characterization and reducing exploration uncertainties.
DM FWI with Sparse OBN Acquisition
DM FWI is a data-driven algorithm using a smooth initial model with little detail. Long offset diving waves and reflections contribute to estimating a high-resolution model from shallow to the base of salt and subsalt. The FWI image obtained from the final FWI model provides an uplift in illumination compared to conventional imaging.
DM FWI for Shallow Water OBN Acquisition
Complex shallow overburden successfully modeled to a high resolution using long offset diving wave and reflection data. Injectites of variable velocity resolved to remove complexity and uncertainty from the underlying stratigraphy.
DM FWI for NAZ Acquisition
DM FWI keys on reflection travel time differences to resolve low and high wavenumber details in the velocity model. A velocity slice shows lithology variations unseen with tomography updates in the initial model.
DM FWI for Land Acquisition
Our DM FWI velocity model building workflow for land data uses both optimal transform and dynamic matching for high-quality results in the presence of noisy seismic records.