dc.contributor.author | Benavides, Francisco | |
dc.contributor.author | Leiderman, Ricardo | |
dc.contributor.author | Souza, Andre | |
dc.contributor.author | Carneiro, Giovanna | |
dc.contributor.author | Bagueira, Rodrigo | |
dc.date.accessioned | 2024-06-18T16:32:51Z | |
dc.date.available | 2024-06-18T16:32:51Z | |
dc.date.issued | 2017 | |
dc.identifier.uri | http://hdl.handle.net/11056/28327 | |
dc.description.abstract | In the present work, we formulate and solve an inverse problem to recover the
surface relaxivity as a function of pore size. The input data for our technique are the
distribution measurement and the micro-tomographic image of the rock sample under
investigation. We simulate the NMR relaxation signal for a given surface relaxivity function
using the random walk method and rank different surface relaxivity functions according
to the correlation of the resulting simulated distributions with the measured distribution. The optimization is performed using genetic algorithms and determines the surface relaxivity function whose corresponding simulated distribution best matches
the measured distribution. In the proposed methodology, pore size is associated with a number of collisions in the random walk simulations. We illustrate the application of the
proposed method by performing inversions from synthetic and laboratory input data and
compare the obtained results with those obtained using the uniform relaxivity assumption. | es_ES |
dc.description.sponsorship | Universidad Nacional, Costa Rica. | es_ES |
dc.language.iso | eng | es_ES |
dc.publisher | Universidad Nacional (Costa Rica) | es_ES |
dc.rights | Acceso abierto | es_ES |
dc.rights | Atribución-NoComercial-CompartirIgual 4.0 Internacional | * |
dc.rights.uri | http://creativecommons.org/licenses/by-nc-sa/4.0/ | * |
dc.source | Computers & Geosciences. pp. 4-27 2017 | es_ES |
dc.subject | SURFACE RELAXIVITY | es_ES |
dc.subject | DIGITAL PETROPHYSICS | es_ES |
dc.title | Estimating the surface relaxivity as a function of pore size from NMR T2 distributions and micro-tomographic images | es_ES |
dc.type | http://purl.org/coar/resource_type/c_6501 | es_ES |
dc.description.procedence | Escuela de Matemática | es_ES |
dc.identifier.doi | 10.1016/j.cageo.2017.06.016 | |