Chaos-simulated Annealing Method In The Application Of Well Logging Interpretation

Lithology and electric property and physical property, oil bearing relationships between research isthe core of the logging data processing and interpretation. Result of conventional logging datacombining with various core analysis test and geological background information is the basis of loggingdata processing and interpretation, the crossplot technique overlap figure statistics, regression analysisand classification is the main research means. As the diversification of the logging method, usingoptimization method processing gradually dominate, this method can make full use of variousstratigraphic information to make accurate judgment to formation. The new chaotic simulated annealingmethod is put forward in this paper, the formation parameters inversion, according to the stratigraphicperformance parameter values, for integrated interpretation of the logging data in the region.Paper first of all, the application of optimization method in log interpretation for simpleintroduction, and then expounds the basic principle of simulated annealing method and in combinationwith chaos algorithm is new optimization algorithm-simulated annealing method, according to thecharacteristics of logging data in a region formation parameters estimation model is established, itsessence is to solve an optimal solution of overdetermined linear equations. Using the proposedoptimization algorithm the optimal solution of equations, namely the region formation parameter values,for the final analysis of the complex lithology and provides the basis for judging oil and gas.Research shows that the application of chaos-simulated annealing algorithm to estimate theformation parameters provides an effective way. This article not only USES a kind of new optimizationalgorithm, and successfully applied to the optimization log interpretation, and comparing with othermethod, the results are very consistent with the actually measured value, for the analysis of the complexlithology and oil and gas provides a reliable way.