摘要
对源自海相碳酸盐岩的原油进行了动力学模拟实验,阐述了该原油再次热解过程中气态烃组分的演化特征和生成动力学参数。运用动力学参数将模拟实验结果外推到地质条件下,结果表明:在150℃时,海相碳酸盐岩烃源岩生成的原油将开始热裂解并生成大量天然气,温度达到220℃时,裂解生气基本结束,天然气就全部取代石油;甲烷的生成Easy%RO主要介于1.2%~2.9%之间,C2-5烃类气体的生成Easy%RO主要介于1.5%~2.5%之间。这一研究结果可为我国的碳酸盐岩烃源岩再次热解产气的定量模拟提供重要依据,有助于海相碳酸盐岩油气的资源评估。
This study reveal composition and the kinetic parameters of gaseous hydrocarbon by kinetic simulating experiment on secondary thermal cracking of the bitumen generated from marine carbonate rocks. The results can be used in nature extrapolation of laboratory kinetic data to very low, geological heating rates. The extrapolation indicates that methane generated under the secondary thermal stress 150℃〈T〈 220℃(1.2%〈 Easy% R0〈1. 9%). The heavy gaseous hydrocarbons (C2 ,C3 ,C4-5 ) generated under 170℃ 〈T〈210℃ (1.5%〈 Easy% R0〈 2.5%). The results can be used in quantitatively modeling the yield of gas generated from the oil that cracked from marine carbonate rocks and provides a new method for evaluating quantitatively the effective source rock.
出处
《天然气地球科学》
EI
CAS
CSCD
2008年第5期695-700,共6页
Natural Gas Geoscience
基金
中国科学院知识创新工程重大项目课题(编号:KZCX1-SW-18-03)
国家"973"项目(编号:G1999043307)联合资助
关键词
海相碳酸盐岩
气态烃
裂解实验
生烃动力学
Marine carbonate rock
Gaseous hydrocarbon
Pyrolysis experiment
Hydrocarbon-generating Kinetics.