煤层气含量现场数理预测方法

摘要

在煤层气勘探时,快速准确地获取气含量非常重要,但现行的测定方法难以满足此要求.根据已有的气含量测试数据,运用数理统计分析、建立预测模型,实现了在测试现场短时间内预测煤层气含量.通过对沁水盆地南部3个区块12口井煤层气含量现场数理预测,其结果经对比检验平均误差为11.42%,证明该预测方法有效、可行,可以现场指导地面煤层气勘探开发或矿井下瓦斯抽采.%To obtain CBM content quickly and correctly is essential during the CBM exploration, but current measuring methods are difficult to meet. Based on available CBM content measured data, applying mathematical statistics, establishing prediction model have realized predicting CBM content on the spot in a short time. Through site mathematical prediction of CBM content for 12 wells in 3 blocks in southern Qinshui Basin, the mean error of results is 11.42％ in comparison to proof-test value. Thus has demonstrated the method is effectual, feasible and can be used in guidance of surface CBM exploration, exploitation or underground gas extraction.