论有机质生烃潜能与生源的关系及干酪根的成因类型

RELATIONSHIP BETWEEN HYDROCARBON POTENTIAL AND BIOLOGICAL ORIGIN OF ORGANIC MATTER AND THE GENETIC TYPES OF KEROGEN

作者对我国若干盆地数百个样品的综合分析表明,(1)藻类等低等水生浮游植物来源的有机质经过一定程度的沉积 成岩氧化可形成贫氢的腐泥型干酪根(Ⅲ型或Ⅳ型):(2)不仅高等植物的某些特殊生化组分可对富集形成壳质型干酪根,其木质纤维组分办可形成相对富氢的腐植型干酪根;(3)不同类型十酪根中的镜质组分的化学结构明显不同;(4)

<ABSTRACT> Our detailed studies on hundreds of kerogen samples in several basins in China indi cated; (I) phytoplankton organic matter (OM) cnn form hydrogen 梡oor sapropalic Kerogens (type I / I . type I and even type W ) through early diagenetic oxidations (2) high land-plant OM can form relatively hydrogen-rich, humic kerogens (type I /II or even type I ) under marine conditions probably by sulphate-reducing bactera degradation; (3) vitrinites isolated from different bulk kerogen types are quite different in atomic composi tion and pyrolysis product, confirming that physico-chemical homogenization processes, by which lignocellulosic tissues of high plants can form relatively hydrogen-rich humic kerogens, can take place in diagenesis. (4)sedimentary ?diagenetic conditions exert impor tant influences on the activation energy and thermostability of OM.