Lithologic Reservoirs ›› 2011, Vol. 23 ›› Issue (1): 103-106.doi: 10.3969/j.issn.1673-8926.2011.01.018

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Improved method of particle swarm impedance inversion and its application

WANG Li， WANG Shanshan， YANG Wei   

  1. College of Geophysics， Chengdu University of Technology， Chengdu 610059， China
  • Online:2011-02-20 Published:2011-02-20

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Abstract:

A new method of particle swarm optimization（PSO） impedance inversion is proposed because of the short comings of conventional PSO algorithm which has slow convergence rate and low inversion efficiency. The algorithm uses PSO algorithm to calculating the sample number and impedance for each layer of the model, and then uses the scanning method to obtain the optimal number of the layer. Compared with conventional PSO algorithm, the examples of synthetic data showthat the method significantly improves the inversion accuracy and convergence rate, and the actual data also proves the validity of this method.

Key words: lowpermeability, active water, laboratory experiment, surfactant

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