Nonlinear AVO inversion based on hybrid intelligent optimization algorithm
Fang Zhongyu1,2, Wang Liping3,4, Du Jiayuan5, Liang Lifeng2
1. College of Geophysics, Chengdu University of Technology, Chengdu, Sichuan 610059, China;
2. CNOOC EnerTech-Drilling & Production Co. Data Processing Co., Zhanjiang, Guangdong 524057, China;
3. Institute of Geophysics and Geomatics, China University of Geosciences(Wuhan), Wuhan, Hubei 430074, China;
4. Hubei Subsurface Multi-scale Imaging Key Laboratory, Wuhan, Hubei 430074, China;
5. Research Institute, Shenzhen Branch, CNOOC, Guangzhou, Guangdong 510240, China
Abstract：As the conventional prestack AVO inversion is dependent on the initial model and easily trapped into a local optimal solution,we propose a nonlinear AVO inversion based on the hybrid intelligent optimization algorithm.First we improve adaptively the conventional genetic algorithm.Then combining the improved genetic algorithm and particle swarm algorithm,we put forward a hybrid GA-PSO co-evolution algorithm.After that we apply the improved genetic algorithm,the particle swarm algorithm,and the GA-PSO co-evolution algorithm to model synthetic data.With the comparison of inverted P-wave velocity,shear wave velocity and density,the GA-PSO co-evolution algorithm shows better inversion result,better stability,and better anti-noise ability than the other two algorithms.In the end,AVO nonlinear inversion with the proposed algorithm is used to real data,and the results confirm its effectiveness and applicability.
Shi Xueming,Wang Jiaying.Lecture on nonlinear inverse methods in geophysics 4:genetic algorithm method.Chinese Journal of Engineering Geophysics,2008,5(2):129-140.
Porsani M J,Stoffa P L,Sen M K et al.A combined genetic and linear inversion algorithm for waveform inversion.SEG Technical Program Expanded Abstracts,1993,12:692-695.
Priezzhev I I,Shmaryan L E and Bejarano G.Non-linear multitrace seismic inversion using neural network and genetical gorithm-Genetic inversion.EAGE 70th Conference & Technical Exhibition Extended Abstracts,2008,137-145.
Veeken P C,Priezzhev I I,Shmaryan L E et al.Nonlinear multitrace genetic inversion applied on seismic data across the Shtokman field off shore northern Russia.Geophysics,2009,74(6):49-59.
Pantelis S,Irfan A,Petros M.Applications of hybrid genetical gorithms in seismic tomography.Journal of Applied Geophysics,2011,75(3):479-489.
Bai J,Xu Z,Xiao Y F.Nonlinear hybrid optimization algorithm for seismic impedance inversion.CPS/SEG Beijing 2014 International Geophysical Conference,2014:541-544.