石油实验地质2017，Vol.39Issue(1)：134-140,7.DOI:10.11781/sysydz201701134
不同热模拟方式下烃源岩干酪根演化特征红外光谱分析
FTIR analyses of source rock kerogen from different hydrous pyrolysis experiments
摘要
Abstract
The generation of hydrocarbons occurred through a complex physical and chemical reaction process in finite pore space under lithostatic pressure and fluid pressure ( PVT⁃L jointly controlled condition ) . Most of the hydrous pyrolysis experiments have been carried out with low⁃pressure and relatively large reaction space due to experimental device limitations. PVT⁃L jointly controlled experiments and conventional autoclave hydrous pyroly⁃sis experiments have been carried out with immature shale from the Biyang Sag, Nanxiang Basin, and kerogens from the experiments were characterized by FTIR, which expressed four trends: ( 1 ) Accompanying aliphatic group cracking, oxygen⁃containing group shedding and aromatic group condensation, the evolution of kerogen ex⁃perienced three periods including slow oil generation, fast oil generation and finishing oil generation. (2)FTIR parameters show more extensive aliphatic group cracking for conventional autoclave hydrous pyrolysis experi⁃ments, while there is still relatively strong hydrocarbon generation in the PVT⁃L jointly controlled experiment. (3)The lower aromatization of saturated hydrocarbons in PVT⁃L jointly controlled experiment may be relevant to higher fluid pressure in a finite space. (4)The slight increase of oxygen level implies the role of water in the hy⁃drocarbon generation process. Different evolutionary characters of kerogen reflected the differences of reaction mechanism, which implied that it is important to choose an appropriate experimental mode in practical research.关键词
生排烃模拟/PVT-L共控/红外光谱/烃源岩Key words
simulation experiment of hydrocarbon generation and expulsion/PVT-L jointly controlled condition/FTIR/source rock分类
能源科技引用本文复制引用
余晓露,马中良,郑伦举,赵中熙..不同热模拟方式下烃源岩干酪根演化特征红外光谱分析[J].石油实验地质,2017,39(1):134-140,7.基金项目
中国石油化工股份有限公司科技攻关项目“烃源岩有限空间生排烃机理研究与应用”（ P11060）和“烃源岩油气形成新机制与评价体系研究”（ P14040）资助。 （）
