等变质煤及镜质组有机地球化学研究──Rock－Eval热解分析

THE STUDY ON THE ORGANIC GEOCHEMISTRY OF ISOMETAMORPHIC COAL AND VITRINITE──ROCK-EVAL PYROLYTIC ANALYSES

本文主要对华北南部苏北、鲁南地区，各种还原型煤（Ⅰ、Ⅱ煤相）的镜质组及其组成进行了详细的Ｒｏｃｋ－Ｅｖａｌ热解分析，并结合煤岩学鉴定及荧光参数的测试，研究其地球比学特征。研究表明，（１）热解分析是煤成烃潜力评价的有效手段；（２）镜质组类型对腐殖煤生烃潜力有重要影响，富氢镜质体是腐殖谋生烃的主要贡献者；（３）壳质组份对腐殖谋的生烃也有贡献；（４）本研究区Ⅰ、Ⅱ煤相谋实质上是由荧光镜质体与壳质组份共同组成的一种特定腐殖型的生油（富）煤．

In this paper,detailed Rock-Eval pyrolyses have been carried out on the vitrinite and composition of various reductional- type coals(i.e. coal facies Ⅱ andⅢ)from the Northern Jiangsu and Southern Shandong provinces of the southern part of North China,and their geochemical features are also studied combining with anthracological identification and the measurement of fluorescent parameters. The above studies suggest the following three comments:1)the pyrolytic analysis could be an effective means for the potential evaluation on coal-derived hydrocarbon,2)the type of vitrinite should play a signigicant influence on the hydrocarbon poteintial derived from humic coal,in which rich hydrogen- bearing vit-rinites are the major contributors to hydrocarbon generation,3 ) exinoid compositions should also be the contributor to the hydrocarbon generation from humic coal, and 4)the rich hydrocarbon-bearing coal with coal facies Ⅱ and Ⅲin the study areas should be a cer-tain type of humic coal which essentially consists of fluorescence vitrinite and exinoid com-positions .