Independent geophysical consultancy
Seismic processing
& depth imaging.
Processing workflows, velocity models and imaging for marine and land projects.
Focused technical input or project oversight, from testing the workflow to reviewing the final result.
Discuss your projectUK based · Working internationally
Services
Marine and land · 2D, 3D and 4D
Processing & reprocessing
Workflows for modern and legacy data, from signal conditioning and demultiple to regularisation and migration preparation.
Velocity models & depth imaging
Model building with tomography, anisotropic control and full-waveform inversion. Time and depth migration, supported by gather and image QC.
Technical project support
Independent workflow reviews, tender support, contractor supervision and technical project leadership.
Selected experience
Marine 3D · Processing and PSDMLegacy survey reprocessing
Rebuilt the workflow from field data through broadband conditioning, demultiple, regularisation and depth imaging for a challenging vintage dataset.
Scope: processing, velocity model building and depth imaging.
Regional 2D · Model buildingMulti-stage velocity updates
Combined refraction and reflection updates with anisotropic control in a multi-stage velocity model workflow.
Scope: full-waveform inversion, tomography and anisotropy.
Examples from prior professional roles. Project details are anonymised.
About SigSeis
SigSeis is an independent consultancy led by Yury Stepanov, a processing and imaging geophysicist with more than 15 years of international project experience.
The work begins with the imaging objective. Key technical decisions are tested, quality control is kept visible, and results are reviewed directly with the client.
Discuss a project
Send a brief outline of your data, objective and timeline.