基于集对分析原理的煤层气井产气量拟合度计算

摘要

In order to quantitatively calculate a fitting degree of the historical fitting results of the coalbed methane well gas production, based on a set pair analysis principle as a theoretical base,a mathematic model to calculate a fitting degree between a historical fitting curve of the coalbed methane well and the actual production curve was established. Based on the historical fitting achievement of the gas production quantity from two coalbed methane wells in Qinshui Basin as a study object,a calculation was conducted on the fitting degree and the fitting curve effect was judged.The calculation results showed that the established mathematic model could easily calculate the fit-ting degree of the fitting curve and could accurately select a best fitting effect curve.The fitting effect of No.1 well was good,the fitting de-gree was 84.3% and the fitting parameters could be the parameters of late exploration and development.The fitting effect of No.2 well was poor,the fitting degree was 71.2% and the fitting parameters should be considered with the actual evaluation standards for the application.%为了能够定量计算煤层气井产气量历史拟合结果的拟合度，以集对分析原理为理论基础，建立了计算煤层气井历史拟合曲线与实际生产曲线拟合程度的数学模型，以沁水盆地的2口煤层气井为研究对象，对其产气量历史拟合曲线拟合度进行计算，判断拟合曲线的效果。计算结果表明，建立的数学模型可以方便的计算出拟合曲线的拟合度，较准确的选择出拟合效果最好的曲线：1号井的拟合效果较好，其拟合度为拟合度为84.3%，拟合的参数可以作为以后勘探开发参数使用；2号井的拟合效果稍差，其拟合度为71.2%，拟合参数是否可用，需要考虑实际评价标准。