煤层气储层评价方法的选择

摘要

为了提高煤层气储层评价工作的效率,在总结前人对煤层气储层评价工作的基础上,根据煤层气储层评价的工作任务、评价流程的特点,分析了目前对煤层气储层评价所用的方法和手段各自的特点;从数据采集、评价指标体系的建立和评价计算方法的选择3个方面,分析了对评价的准确度、精确度、可信度的影响程度.认为目前计算机技术的应用已很深入,煤层气储层评价方法可以根据评价工作目标选择更加简单的方法,并且可以使得煤层气储层评价结果可视化程度大大提高.同时,利用同一组数据计算、对比了一般综合评价方法与熵权法的分析过程和结果的差异.%In order to improve the efficiency of the coalbed methane reservoir evaluation, this paper analyzed the characteristics of various methods and tools currently used for coalbed methane reservoir evaluation on the basis of summarizing previous work and according to the tasks and procedures of the relevant work. In the aspects of data acquisition, the establishment of die evaluation index system and the choice of the evaluation and calculation methods, the authors analyzed the degree of influences upon the accuracy, precision and reliability of the evaluation. It is held that, with the deepening utilization of the computer technology, simpler methods can be chosen according to the working objective of the evaluation, and the visualization of the methane reservoir evaluation result can be gready improved. In addition, using the same set of data, the authors compared the results of die analytical process and difference between the common comprehensive evaluation method and the entropy method.