Reflected wave least squares reverse time migration with angle illumination compensation

• Autorzy: Zhou Huamin , Chen Shengchang , Zhou Liming , Ren Haoran , Wu Rushan , Xiao Guoqiang

Identyfikatory

DOI

10.1007/s11600-019-00368-1

• Języki publikacji: EN

Abstrakty

EN

High-quality seismic data imaging plays an important role in the lithological interpretation of subsurface structures. However, high-quality imaging remains a challenging task. Based on the linear inversion theory of reflected wave equations, this paper proposes reflected wave least squares reverse time migration with angle illumination compensation to better balance the amplitude of seismic imaging. We use the reflected wave migration equation to unify forward and backward propagation, which helps to obtain an image with correct phase and symmetric waveform. Under the assumption that the spectrum of seismic wavefield remains unchanged, the Poynting vector method is used to efficiently calculate the propagation direction of seismic waveform and seismic illumination in the angle domain. During iteration, angle-domain illumination is used as a preconditioner to compensate for the amplitude of the iterated gradient terms based on the angle value. In this manner, we can enhance the imaging energy of steeply inclined structures. To improve the stability of linear inversion, the spatial derivative of the image is used as a regularized constraint term. Numerical tests show that the proposed method can suppress imaging noise as well as improve resolution and amplitude fidelity of the images. Furthermore, the inversed result can be used to estimate underground reflectivity, which is important for the further development of seismic inversion technology.

Słowa kluczowe

EN

linear inversion; reflected wave; regularization; least squares reverse time migration; angle illumination compensation

PL

inwersja liniowa; fala odbita; regularyzacja

• Wydawca: Instytut Geofizyki PAN ; Springer
• Czasopismo: Acta Geophysica
• Rocznik: 2019
• Tom: Vol. 67, no. 6
• Strony: 1551--1561
• Opis fizyczny: Bibliogr. 39 poz.

Twórcy

autor

Zhou Huamin

• Key Laboratory of Geotechnical Mechanics and Engineering of the Ministry of Water Resources, Changjiang River Scientific Research Institute, Wuhan 430010, China

autor

Chen Shengchang

• School of Earth Sciences, Zhejiang University, Hangzhou 310027, China

autor

Zhou Liming

• Key Laboratory of Geotechnical Mechanics and Engineering of the Ministry of Water Resources, Changjiang River Scientific Research Institute, Wuhan 430010, China

autor

Ren Haoran

• School of Earth Sciences, Zhejiang University, Hangzhou 310027, China

autor

Wu Rushan

• IGPP, University of California, Santa Cruz, CA 95064, USA

autor

Xiao Guoqiang

• Key Laboratory of Geotechnical Mechanics and Engineering of the Ministry of Water Resources, Changjiang River Scientific Research Institute, Wuhan 430010, China

Bibliografia

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Uwagi

Opracowanie rekordu ze środków MNiSW, umowa Nr 461252 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2020).