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对不同来源煤炭腐植酸的抗温、抗盐、磺化性能等进行了室内研究，结果表明抗温性能为风化煤＞褐煤＞泥炭，而褐煤及泥炭的抗盐、磺化性能优于风化煤。风化煤经降解活化后可进行接枝等深加工改性。煤中的非腐植酸组份在一定范围内对改善钻井液性能有益而无害。
The indoor research on the heat resistance, salt resistance and sulfonation properties of humic acids from different sources showed that the anti-temperature property was weathered coal> lignite> peat, while the salt and sulfonation properties of lignite and peat were better than that of weathered coal . Weathered coal degradation after activation can be grafted and other deep-processing modification. Non-humic acid components in coal are beneficial and harmless to improving drilling fluid performance over a range of temperatures.