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The Methodological Research of Wave Impedance Inversion Based on Genetic Algorithms

Author: HuangJinLa
Tutor: LiQingChun
School: Chang'an University
Course: Earth Exploration and Information Technology
Keywords: Wave impedance Inversion Genetic Algorithms Group migration Select Cross Variation
CLC: P631.4
Type: Master's thesis
Year: 2008
Downloads: 174
Quote: 1
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Abstract


The genetic algorithm is a search algorithm for a simulation of natural biological evolution . As the genetic algorithm is not restrictive assumptions of the search space constraints , not to the solution space the continuous conductive and other properties , as well as the algorithm inherent computational parallelism , which is widely used in various fields . This paper introduces the current acoustic impedance inversion and genetic algorithm , and describes the theoretical basis of the genetic algorithm , discussed the algorithm converges on the basis of the genetic algorithm introduced seismic impedance inversion of wave impedance based on genetic algorithm inversion principle . Genetic algorithm for acoustic impedance inversion involves multi-parameter coding , as well as the corresponding genetic manipulation is not easy to achieve , a comprehensive analysis of the summary of the genetic algorithm encoding its corresponding choice on the basis of the cross - ways , as well as the variability Styles focus on a binary string encoding , real-coded real-coded group migration strategy inversion , and to achieve optimal preservation strategy selection , random uniform distribution select , Gaussian mutation and the Multigroup migration program . De Jong function , Ackley function test , to prove the effectiveness and convergence of the genetic algorithm used in this paper . This paper the application of genetic algorithms calculate the different sub- wave , different noise , different theoretical models of the initial wave impedance inversion results and characteristics , and Marmousi the model CMP superimposed gathers some data as contemplated actual the data wave impedance inversion of the genetic algorithm has achieved the desired results . General wave impedance inversion results based on genetic algorithm is satisfactory .

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CLC: > Astronomy,Earth Sciences > Geology > Geology, mineral prospecting and exploration > Geophysical exploration > Seismic exploration
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