Seismic data processing
Our main advantage in the field of seismic data processing is: processing of seismic data in true amplitudes (Maintaining the amplitude-frequency characteristics of the signal), author's (own) innovative solutions, highly effective noise suppression methods (technologies), full wave, 3D data regularization (5D interpolation), full Kirchhoff 3D prestack time migration (PSTM), Kirchhoff 3D prestack depth migrations (PSDM), 3D refraction tomography, Building anisotropic velocity determination models, including of symmetry (VTI, HTI) and tilted axis of symmetry (TTI).
3D prestack time migration (PSTM). The imaging in prestack time migration is realized via application of Kirchhoff integration solution of wave equation, which uses all offset seismic data, and can be applied effectively to complex exploration areas in which velocity varie strongly both along the radial and vertical direction. The migration quality of seismic data is determined by the precision of migration velocity. PSTM is an iterative process for seismic data migration and improvement of migration velocity. So PSTM is a better migration algorithm for imaging complex geological structure.
Pre-stack Depth Migration (PSDM) is the preferred seismic imaging tool for today’s most challenging exploration & reservoir-delineation projects. Without PSDM, much of the oil and gas now being found and produced in complex geological settings around the world, not have been identified or, more to the point, accurately imaged. The travel times may be obtained from first arrivals, maximum energy, minimum distance or, eikonal calculations. PSDM supports ISO, TTI, VTI and HTI velocity tomographies. In essence, the improved understanding of the subsurface offered by PSDM helps to reduce risk, that in recent years this has been proven time in different region all over the world.
Reverse Time Migration (RTM) is a shot domain migration. Method RTM implements wave propagation calculations in a highly parallel environment for efficient propagation of the waves through subsurface media. By storing every source wave time step it solves the problem of reverse order access to the source time steps for correlation with those of the receivers.
Common Reflection Angle Migration (CRAM) is an anisotropic multi-arrival solution that uses the entire wavefield, making it ideal for solving complex imaging objectives. CRAM performs imaging in the local angle domain to achieve uniform illumination from all angles and all azimuths, producing amplitude-preserved, and angle-dependent reflectivity gathers. These outputs are ideally suited for velocity model determination and amplitude analysis. CRAM can be utilized to provide fast, targetoriented solutions for local analysis, and can also be used for imaging on a regional scale.
Full-Waveform Inversion (FWI) produces a velocity model, which shows greater vertical and lateral resolution of karst features and reveals a high velocity layer not present in the traveltime inversion model.