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Coloured Inversion Revisited — Optimisation and Simplification Assessment
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, 79th EAGE Conference and Exhibition 2017, Jun 2017, Volume 2017, p.1 - 5
Abstract
We revisit the coloured inversion methodology and verify if it is possible to improve the relative acoustic impedance (RAI) estimation using the conjugate gradient algorithm. Additionally, it is analysed if simplifying the coloured inversion methodology, to avoid the well log information requirement, and then providing this result to the optimisation process will produce good results. The numerical experiments demonstrate that the coloured inversion can produce sufficient RAI estimation even when large gaps in the seismic low-frequency range occur. Moreover, depending on the seismic data frequency content, the inversion scheme without well log information may provide results comparable to the coloured inversion. Tests with real data indicate that the optimisation step can slightly improve the coloured inversion results and a quite good RAI estimation may be obtained from the procedure that does not demand well log data.