测井解释最优化方法中的误差和约束条件

Error and Constraint Condition in The Optimization Methodof Logging Interpretation

最优化技术是目前国内外进行岩生分析和煤层分析中技术较先进、应用效果较好的一种方法。煤田测井的CASSAY程序所采用了最优化方法,其目标函数中引入了误差和约束项,但由于煤田测井方法的特点以及其数学、物理和地质意义不明确,给实际应用该程序带来许多困难。当解释模型确定后,测量误差、响应方程误差和约束误差的取值是最优化结果的关键。本文将就煤田测井解释的最优化方法中有关的误差、误差取值、约束条件和约束误差进行讨论,并给出适合于煤田测井的最优化解释流程。

The technique of optimization is an advanced method and has better effect of application on analyses of lithology and coal-bed at home and abroad recently. The optimization method was used in the CASSAY program of coal logging, and lead the error term and constraint term into its objective function, but because of the properties of coal logging and its significances of mathematics, physics and geology unclear, make real application of the program very difficult. After determination of interpretation model, the valuations of surveying error, response equation error and constraint error are the key of optimization. The paper will discuss on the errors related to optimization method of coal logging interpretation, error valuation, constraint condition and constraint error, and provide optimization interpretation flow suitable for coal logging.