Function (biology)

Reflection (computer programming)

Truncation (statistics)

Algorithm

Scheme (mathematics)

Biology

Time shifting

Telecommunications

Computer science

Mathematical optimization

Acoustics

Seismology

Surface (topology)

Geology

Evolutionary biology

Physics

Mathematics

Macro

Multiple

Mathematical analysis

Geometry

Horizon

Transmission (telecommunications)

Programming language

Geophysics

Machine learning

Arithmetic

Seismic migration

Journal of Applied Geophysics

Marchenko imaging is a methodology to image the subsurface with two important properties: (1)accurate amplitude and (2)free from free-surface and internal multiple artefacts. It requires an estimate of the first arrival of the focusing function which is commonly obtained from a macro velocity model. Inspired by this limitation, a projected Marchenko scheme has been introduced from which an internal multiple reflection elimination scheme has been derived. This internal multiple reflection elimination scheme requires an estimate of the two-way travel time surface of a selected horizon in the subsurface instead of a macro model. In order to make it totally model free we have rewritten the scheme by replacing the estimate of the two-way travel time surface by a fixed truncation for all traces. The output of the current scheme contains primary reflections without contamination from internal multiple reflections. We apply this scheme to a 2D numerical example to illustrate the procedure of this method and show how the internal multiple reflection eliminated data set can be retrieved and the migration image is improved.

Marchenko scheme based internal multiple reflection elimination in acoustic wavefield