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- W2024553334 abstract "ABSTRACT The main objective of the AVO inversion is to obtain posterior distributions for P‐wave velocity, S‐wave velocity and density from specified prior distributions, seismic data and well‐log data. The inversion problem also involves estimation of a seismic wavelet and the seismic‐noise level. The noise model is represented by a zero mean Gaussian distribution specified by a covariance matrix. A method for joint AVO inversion, wavelet estimation and estimation of the noise level is developed in a Bayesian framework. The stochastic model includes uncertainty of both the elastic parameters, the wavelet, and the seismic and well‐log data. The posterior distribution is explored by Markov‐chain Monte‐Carlo simulation using the Gibbs' sampler algorithm. The inversion algorithm has been tested on a seismic line from the Heidrun Field with two wells located on the line. The use of a coloured seismic‐noise model resulted in about 10% lower uncertainties for the P‐wave velocity, S‐wave velocity and density compared with a white‐noise model. The uncertainty of the estimated wavelet is low. In the Heidrun example, the effect of including uncertainty of the wavelet and the noise level was marginal with respect to the AVO inversion results." @default.
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- W2024553334 date "2003-10-23" @default.
- W2024553334 modified "2023-10-15" @default.
- W2024553334 title "Joint AVO inversion, wavelet estimation and noise-level estimation using a spatially coupled hierarchical Bayesian model" @default.
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- W2024553334 doi "https://doi.org/10.1046/j.1365-2478.2003.00390.x" @default.
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