scholarly journals LOCAL SEARCH OPTIMIZATION: A COMPARISON OF ALGORITHMS FOR NONHYPERBOLIC TRAVEL-TIME ANALYSIS

2019 ◽  
Vol 7 (4) ◽  
pp. 321-328
Author(s):  
Nelson Ricardo Flores Zuniga
Keyword(s):  
Local Search ◽  
Travel Time ◽  
Processing Time ◽  
Function Analysis ◽  
Optimization Algorithms ◽  
Time Analysis ◽  
Converted Wave ◽  
Search Optimization ◽  
Calculated Curve ◽  
Inversion Procedure

In the last decade, many works compared nonhyperbolic multiparametric travel-time approximations to perform velocity analysis. In these works, some analyses were accomplished, such as accuracy analysis and objective function analysis. However, no previous works compared the optimization algorithms to perform the inversion procedure concerning the processing time and the accuracy of each algorithm. As the shifted hyperbola showed the best results among the unimodal approximations in previous works, it was selected to be used in a comparison with five local search optimization algorithms. Each algorithm was compared concerning the accuracy by the minimization of the calculated curve to the observed curve. The travel-time curves tested here are conventional (PP) and converted wave (PS) reflection events from an offshore model. With this set of tests, it is possible to define which optimization algorithm presents the most reliable result when used with the shifted hyperbola equation concerning the processing time and the accuracy.

scholarly journals COMPARISON OF GLOBAL SEARCH OPTIMIZATION ALGORITHMS TO PERFORM THE VELOCITY ANALYSIS WITH A CONVERTED WAVE MOVEOUT EQUATION

2019 ◽  
Vol 7 (6) ◽  
pp. 1-9
Author(s):  
Nelson Ricardo Coelho Flores Zuniga
Keyword(s):  
Objective Function ◽  
Travel Time ◽  
Optimization Algorithm ◽  
Processing Time ◽  
Optimization Algorithms ◽  
Global Search ◽  
Velocity Analysis ◽  
Converted Wave ◽  
Search Optimization ◽  
Deep Reservoir

Even with previous works having studied about the accuracy and objective function of several nonhyperbolic multiparametric travel-time approximations for velocity analysis, they lack tests concerning different optimization algorithms and how they influence the accuracy and processing time. Once many approximations were tested and found the multimodal one which presented the best accuracy results, it is possible to perform a velocity analysis with different global search optimization algorithms. The minimization of the curve calculated with the converted wave moveout equation to the observed curve can be done for each optimization algorithm selected in this work. The travel-time curves tested here are the PP and PS reflection events coming from the interface of the top of an offshore ultra-deep reservoir. After the inversion routine have been performed, it is possible to define the processing time and the accuracy of each optimization algorithm for this kind of problem.

Generic Support for Precomputation-Based Global Routing Constraints in Local Search Optimization

2020 ◽  
pp. 151-165
Author(s):  
Renaud De Landtsheer ◽  
Fabian Germeau ◽  
Thomas Fayolle ◽  
Gustavo Ospina ◽  
Christophe Ponsard
Keyword(s):  
Local Search ◽  
Global Routing ◽  
Search Optimization

scholarly journals Assessment of Smolt Condition for Travel Time Analysis, 1988 Annual Report.

1989 ◽  
Author(s):  
John W. Beeman ◽  
Eric J. Wagner ◽  
Dennis W. Rondorf
Keyword(s):  
Travel Time ◽  
Annual Report ◽  
Time Analysis
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