A Simultaneous Inversion Method for Reflection Coefficient Sequences of Multi-channel Seismic Records

A reflection coefficient sequence and seismic record technology, applied in the field of geophysical exploration, can solve the problems of severe impedance low-frequency noise, slow convergence speed, ignoring the lateral continuity of seismic records, etc., and achieve high calculation efficiency, global convergence and super-linear convergence rate , Inversion results are stable
CN107589448BActive Publication Date: 2019-02-05XI AN JIAOTONG UNIV
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Patent Information

Authority / Receiving Office
CN ยท China
Patent Type
Patents(China)
Current Assignee / Owner
XI AN JIAOTONG UNIV
Publication Date
2019-02-05

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Abstract

The invention discloses a multichannel seismic record reflection coefficient sequence simultaneous inversion method. The method thoroughly considers sparse characteristics of a formation reflection coefficient sequence and spatial transverse continuity of seismic channels, a parameterized exponential function is used to measure the sparsity of the reflection coefficient sequence, and a corresponding constrained optimization objective function is built. Firstly, based on the characteristics of a convolution model and the sparsity hypothesis of the reflection coefficients, on the premise of notlosing any information, a dimension reduction preprocessing matrix is designed, and the dimension of the constrained objective function is reduced; and then, a trust region sequential quadratic programming algorithm is used for high-efficiency solution. The algorithm has global convergence and a super linear convergence rate, the calculation efficiency is high, and the inversion precision is high.Compared with the traditional single-channel seismic record deconvolution algorithm, the algorithm of the invention has a more stable and reliable inversion result as the spatial correlation of the seismic channels is considered.
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Description

technical field

[0001] The invention belongs to the technical field of geophysical exploration, and relates to a seismic record reflection coefficient sequence inversion method, in particular to a multi-channel seismic record reflection coefficient sequence simultaneous inversion method. Background technique

[0002] In stratigraphic-lithological reservoirs, thin interbedded reservoirs are one of the main reservoir types. Due to the limited frequency range of the artificial seismic source used to stimulate the earthquake, the travel time difference of the reflected waves generated by the thin layer is small, so that the reflected waves superimpose and interfere with each other, and the received seismic records cannot directly distinguish the thin interbedded structure, which is the identification of thin interbedded reservoirs. bring about many difficulties. Therefore, it is necessary to improve the resolution of reflection seismic records to achieve high-precision characte...

Claims

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