De-Multiple and De-ghosting

To obtain the best migrated image, we must supply input data free of false reflections with the widest true frequency range possible. Failing this, the output image will be corrupted by multiple reflections causing false structure and lower resolution.

Industry standard de-multiple approaches are limited by water depth, offsets and sampling. They require a long and tedious workflow which often fails to effectively remove multiples. Similarly, standard de-ghosting routines cannot record low end frequencies and also result in poor resolution in the high frequencies.

In contrast, eMULT is not limited by water depth, offsets or sampling. eMULT combines multiple modelling and adaptive, non-stationary subtraction techniques, where the multiple model represents all orders of multiple. eMULT preserves amplitudes and removes multiples without destroying primary energy.  This yields gathers with higher signal to noise ratio and a cleaner migration which means amplitudes are preserved for rock properties and inversion.

eBAND removes all S-R ghosts from broadband data allowing the recovery of low end frequencies. It also makes available frequencies in the 90-110 Hz range resulting in higher resolution in the upper part of the section. It is ideal for re-processing of old data where it can improve well ties and produce higher resolution elastic properties.

eMULT and eBAND by SIP give you all you need for effective multiple removal and de-ghosting.

Chalk Multiples, U.K. North Sea

A bright water bottom multiple occurs between Sele and Top Chalk as well as inter-bed multiples within the Chalk contaminating the Jurassic.

eMULT removes the water bottom and inter-bed multiples revealing the true image of the Hugin Fm in the Jurassic (lower red arrows).

Our P&I Services

pre-processing

  • Processing from field tapes

  • eMULT proprietary de-multiple

  • eBAND proprietary de-ghost

  • Broadband

  • Multi-azimuth

  • Multi-client. multi-licence

  • Land and Marine

Velocity Modelling

  • AutoImager data-driven modelling

  • Iterative and migration-based

  • Accurate anisotropic velocity and Eta

  • Geologically consistent velocities

  • Beam Tomography

  • FWI

Depth Imaging

  • GRT true amplitude, AVA compliant

  • eGWM ultra-fast wave equation migration

  • Traditional migrations, e.g RTM, Kirchhoff

  • VTI/TTI

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