Seismic Reverse Time Migration Using A New Wave-Field Extrapolator and a New Imaging Condition

• Autorzy: Moradpouri F. , Moradzadeh A. , Pestana R. C. , Monfared M.

Identyfikatory

DOI

10.1515/acgeo-2016-0076

• Języki publikacji: EN

Abstrakty

EN

Prestack reverse time migration (RTM), as a two way wave-field extrapolation method, can image steeply dipping structures without any dip limitation at the expense of potential increase in imaging artifacts. In this paper, an efficient symplectic scheme, called Leapfrog-Rapid Expansion Method (L-REM), is first introduced to extrapolate the wavefield and its derivative in the same time step with high accuracy and free numerical dispersion using a Ricker wavelet of a maximum frequency of 25 Hz. Afterwards, in order to suppress the artifacts as a characteristic of RTM, a new imaging condition based on Poynting vector and a type of weighting function is presented. The capability of the proposed new imaging condition is then tested on synthetic data. The obtained results indicate that the proposed imaging condition is able to suppress the RTM artifacts effectively. They also show the ability of the proposed approach for improving the amplitude and compensate for illumination.

Słowa kluczowe

EN

RTM; Poynting vector; artifacts; Leapfrog-Rapid Expansion Method; imaging condition

PL

RTM; wektor Poyntinga; artefakt

• Wydawca: Instytut Geofizyki PAN ; Springer
• Czasopismo: Acta Geophysica
• Rocznik: 2016
• Tom: Vol. 64, no. 5
• Strony: 1673--1690
• Opis fizyczny: Bibliogr. 52 poz.

Twórcy

autor

Moradpouri F.

• Shahrood University of Technology, Faculty of Mining Petroleum and Geophysics, Shahrood, Semnan, Iran

autor

Moradzadeh A.

• Shahrood University of Technology, Faculty of Mining Petroleum and Geophysics, Shahrood, Semnan, Iran
• School of Mining Engineering, College of Engineering, University of Tehran, Tehran, Iran

autor

Pestana R. C.

• Center for Research in Geophysics and Geology (CPGG), Federal University of Bahia (UFBA), Salvador, Brazil

autor

Monfared M.

• Shahrood University of Technology, Faculty of Mining Petroleum and Geophysics, Shahrood, Semnan, Iran

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