dc.contributor.advisor | Tjelmeland, Håkon | nb_NO |
dc.contributor.advisor | Borgos, Hilde | nb_NO |
dc.contributor.author | Sande, Stian | nb_NO |
dc.date.accessioned | 2014-12-19T13:58:49Z | |
dc.date.available | 2014-12-19T13:58:49Z | |
dc.date.created | 2011-06-27 | nb_NO |
dc.date.issued | 2006 | nb_NO |
dc.identifier | 426876 | nb_NO |
dc.identifier | ntnudaim:1472 | nb_NO |
dc.identifier.uri | http://hdl.handle.net/11250/258819 | |
dc.description.abstract | A new inversion method for time-lapse seismic data is developed. The method is based on the 3-dimensional spatially coupled AVO inversion in the Fourier domain, describedin Buland et al. (2003b). Further, a technique for estimating the time-shift betweentwo seismic surveys, called non-rigid matching (Nickel & Sønneland, 1999), is an importantand integrated part of the method. In addition to using the technique to alinethe repeated survey with the baseline survey, the estimates produced by the non-rigidmatching are treated as observations together with the seismic observations.As the natural choice for many geophysical inversion problems, the inversion methodproposed is set in a Bayesian framework. Prior information in the form of well logscombined with seismic observations and an estimate of the time-shift, produce the posteriordistribution. The posterior distribution not only gives a best fit to the inversionproblem, but also a measure of the uncertainty.Synthetic data based on the Gullfaks field are used to test our time-lapse inversionmethod, including tests of robustness. | nb_NO |
dc.language | eng | nb_NO |
dc.publisher | Institutt for matematiske fag | nb_NO |
dc.subject | ntnudaim:1472 | no_NO |
dc.subject | SIF3 fysikk og matematikk | no_NO |
dc.subject | Industriell matematikk | no_NO |
dc.title | Bayesian 4D inversion: integrating time-shift information | nb_NO |
dc.type | Master thesis | nb_NO |
dc.source.pagenumber | 78 | nb_NO |
dc.contributor.department | Norges teknisk-naturvitenskapelige universitet, Fakultet for informasjonsteknologi, matematikk og elektroteknikk, Institutt for matematiske fag | nb_NO |