Study on kinetics of hydrocarbon generation from coals in the Qinshui Basin

doi:10.1360/04wd114

	Study on kinetics of hydrocarbon generation from coals in the Qinshui Basin
	Duan, Y ; Wu, BX ; Zheng, CY ; Wang, CY ; Zhang, H ; Tao, MX ; Liu, JZ ; Zhang, XJ
刊名	CHINESE SCIENCE BULLETIN
	2005-09-01
卷号	50 期号:17 页码:1904-1911
关键词	Qinshui Basin Hydrocarbon Generation Of Coal Kinetic Simulation Prediction For The Amount Of Coal-derived Gas Generation
ISSN号	1001-6538
DOI	10.1360/04wd114
文献子类	Article
英文摘要	A new method for the quantitative assessment of hydrocarbon generation potential from coals by means of the chemical reaction kinetics has been developed gradually over the recent years. In this paper, the kinetic parameters of hydrocarbon gas generation are determined by high temperature and pressure, and closed-system thermal simulation for Late Paleozoic coals in the Qinshui Basin and the kinetic characteristics and the histories of hydrocarbon gas generation were studied using the parameters obtained. Results show that during the longer period from the Triassic (T) to the Middle Jurassic (J(2)), the coal-derived methane yield increased more slowly under lower palaeogeotemperature in the Qinshui Basin; however, the shorter period from Late Jurassic to Early Cretaceous, the coal-derived methane yield increased more rapidly under higher palaeogeotemperature. The correlation between the thermal simulation and the factual data shows that C(1)/(C(1)+C(2-4)) coefficients computed by the histories of methane and C(2)-C(4) hydrocarbon generation can provide evidence for the identification of the genesis of coal bed gas in the different areas of the Qinshui Basin. The kinetic simulating experiment of hydrocarbon generation for the peat considered as the original matter of coal formation was performed for the first time and the simulated results were compared with the characteristics of hydrocarbon generation from coals undergoing various palaeogeotemperature in the Qinshui Basin. The result indicates that the peat has a higher potential of hydrocarbon generation than that of coals. Therefore, the hydrocarbon generation results obtained from kinetic simulation for coal with higher maturation rank could not stand for their original hydrocarbon generation potential and thus would lead to an underestimation for coal-bed gas resource. The generative amount of coal-derived gas in the Qinshui Basin was predicted using kinetic simulation results for the peat and their maximum was estimated. The calculation shows that the generative amount of coal-derived gas from Taiyuan Formation and Shanxi Formation coal-beds in the Qinshui Basin is the highest in Yangeheng area, higher in Qinyuan area and the lowest in Huoshan area. Therefore, the conditions of coal-bed gas generation are the best in Yangcheng area, the second in Qinyuan area and not very good in Huoshan area.
WOS关键词	RATE CONSTANTS ; KEROGEN ; GEOCHEMISTRY ; PYROLYSIS
WOS研究方向	Science & Technology - Other Topics
语种	英语
出版者	SCIENCE PRESS
WOS记录号	WOS:000233072700018
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/65284]
专题	中国科学院地质与地球物理研究所
作者单位	1.Chinese Acad Sci, Inst Geol & Geophys, Lanzhou 730000, Peoples R China 2.Chinese Acad Sci, Guangzhou Inst Geochem, Guangzhou 510640, Peoples R China 3.Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China
推荐引用方式 GB/T 7714	Duan, Y,Wu, BX,Zheng, CY,et al. Study on kinetics of hydrocarbon generation from coals in the Qinshui Basin[J]. CHINESE SCIENCE BULLETIN,2005,50(17):1904-1911.
APA	Duan, Y.,Wu, BX.,Zheng, CY.,Wang, CY.,Zhang, H.,...&Zhang, XJ.(2005).Study on kinetics of hydrocarbon generation from coals in the Qinshui Basin.CHINESE SCIENCE BULLETIN,50(17),1904-1911.
MLA	Duan, Y,et al."Study on kinetics of hydrocarbon generation from coals in the Qinshui Basin".CHINESE SCIENCE BULLETIN 50.17(2005):1904-1911.