Thermal Maturity, Alginite-Bitumen Transformation, and Hydrocarbon Generation in Upper Ordovician Source Rocks, Saskatchewan, Canada
Thermal Maturity, Alginite-Bitumen Transformation, and Hydrocarbon Generation in Upper Ordovician Source Rocks, Saskatchewan, Canada
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加拿大萨斯喀彻温省上奥陶统烃源岩的热成熟度、褐藻土-沥青转化和生烃
DOI：
10.1080/00908319308909025
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发表时间：
1993
期刊：
影响因子：
--
通讯作者：
K. Osadetz
中科院分区：
文献类型：
--
作者：
L. Stasiuk;K. Osadetz
摘要应用有机岩石学技术研究了加拿大萨斯喀彻温省威利斯顿盆地北部上奥陶统约曼组库克尔site烃源岩的褐藻质-沥青-油转化过程。kukersites具有浸染状和叠层状两种不同的层间微相，每一种微相都代表了藻褐岩显微组分Gloeocapsomorpha prisca的前体生长阶段。不同的原油反射率增加率表明了两个G. prisca显微亚变种的不同热成熟速率和产油阈值，并通过荧光光谱的偏移和转化成沥青的观察得到了验证。随着热成熟程度的提高，浸染型普丽卡达软化阶段，失去其原始形态特征，由原生组分向次生组分（沥青）转变。平层石亚种在增加土壤湿度时没有表现出类似的变化。
Abstract Organic petrological techniques have been used to study the alginite-bitumen-oil transformation in Upper Ordovician Yeoman Formation kukersite source rocks of the northern Williston Basin, Saskatchewan, Canada. The kukersites are characterized by two distinct interlaminated microfacies, disseminated and stromatolitic, each representing a growth stage of the precursor to the alginite maceral Gloeocapsomorpha prisca. Different rates of thermal maturation and thresholds of petroleum generation for the two G. prisca maceral subvarieties are indicated by different rates of percent reflectance in oil increase and are verified by shifts in fluorescence spectra and observations on transformation into bitumen. With increasing thermal maturation, disseminated G. prisca reaches a softening stage, losing its primary morphological features as it is transformed from a primary to a secondary maceral (bitumen). The stromatolitic subvariety of G. prisca does not display comparable alteration in response to increa...