基于多尺度随机森林融合地质、测井和地震资料的煤层含气量预测

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中图分类号：P631 文献标识码：A DOI：10.13810/j.cnki.issn.1000-7210.20250354

Abstract： Accurate estimation of coalbed methane （CBM） content plays a crucial role in assessing and efficiently exploiting CBM resources. Deep CBM is influenced by multiple controling factors and complex genetic mechanisms. Currently，machine-learning approaches for CBM content prediction typically rely on either seismic or logging data.As a result，the complex geological conditions of deep coal seam are not fully accounted for. This study proposes an intelligent prediction method for CBM content，which achieves multi-source data fusion through a multi-scale modeling and deep integration strategy.The approach first extracts multi-scale sensitive attributes or features relevant to CBM content from geological，logging，and seismic sources.For each dataset of the same scale，adaptive modeling is performed using a Bayesian hyperparameter-optimized random forest （RF） algorithm，which enhances model robustness and prevents overfiting.The prediction results from individual scales are subsequently integrated through the least squares method to construct a multi-scale RF composite model.The proposed method is validated using a field dataset and compare its performance with that of conventional approaches，including single-scale RF and linear regression.The results show that，compared with these baseline methods，the proposed method reduces the mean relative error of CBM content prediction on test wells by 3.01% and 4.94% ， respectively. This demonstrates that the proposed approach achieves higher accuracy and stronger generalization capability，enabling precise characterization of the spatial distribution of CBM content.

Keywords：coalbed methane，randomforest，multi-scaledata，OrdosBasin

刘浪，袁三一，于越，等.基于多尺度随机森林融合地质、测井和地震资料的煤层含气量预测[J].石油地球物理 勘探，2026，61（2）：283-293.

Liu Lang，Yuan Sanyi，Yu Yue，et al.The prediction of coalbed methane content based on multi-scale random forest integrating geological，logging，andseismic data[J]. Oil Geophysical Prospecting，2026，61（2）： 283-293.

0 引言

煤层气（CoalbedMethane，CBM）作为一种自生型非常规天然气，燃烧时仅产生二氧化碳和水，几乎无其他气体排放[]。（剩余16807字）