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Mathematical Problems in Engineering
Volume 2014, Article ID 164932, 6 pages
http://dx.doi.org/10.1155/2014/164932
Research Article

Two-Parameter Inversion of Fluid-Saturated Porous Medium with Niche Ant Colony Algorithm

Harbin Institute of Technology Shenzhen Graduate School, Shenzhen, Guangdong 518055, China

Received 6 November 2013; Accepted 2 December 2013; Published 9 January 2014

Academic Editor: Manuel Ruiz Galan

Copyright © 2014 Xin-Ming Zhang and Li-Rong Wang. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Based on the Biot model, we performed the inversion of reservoir parameters with improved niche ant colony algorithms (INACA). In order to overcome the premature problem of inverse process, the improved niche ant colony algorithms are constructed by combining the fitness-sharing principle which is one of the niche methods with the ant colony algorithm. The numerical results indicate that the relative error of single parameter inversion can be maintained at less than 0.4 percent; particulary, the relative error of porosity is less than 0.02 percent. However, the inversion effect of two-parameter inversion was found to be slightly weak, but the relative error can still be maintained at less than 7.5 percent. Moreover, the antinoise property of the method was also verified. The results of numerical simulation demonstrate that the method is an effective convergent optimization method.