1前言在印度尼西亚马哈坎三角洲为油田开发、已钻了许多探井，它们钻到晚第三纪的一些层序进入到生油带和排油带。在所有这些层序中都有煤的记录。这些煤被模棱两可地看作构成了与有机质成因有关的“均相系列”。对煤的许多研究都把这种“均相系列”解释为随煤级增加而变化的根 1 INTRODUCTION Many oil exploration wells have been drilled in the Mahakan delta in Indonesia and have been drilled into some sequences of late Tertiary into the oil and discharge zones. There is a record of coal in all these sequences. The coal is equivocally seen as constituting a “homogeneous series” of organic matter-related causes. Many studies of coal interpret this “homogeneous series” as a root that changes as coal rank increases