Origin of Paleogene natural gases and discussion of abnormal carbon isotopic composition of heavy alkanes in the Liaohe Basin, NE China

doi:10.1016/j.marpetgeo.2017.11.028

	Origin of Paleogene natural gases and discussion of abnormal carbon isotopic composition of heavy alkanes in the Liaohe Basin, NE China
	Peng, Weilong 1; Hu, Guoyi 1; Feng, Ziqi 2; Liu, Dan 3; Wang, Youwei 4; Lv, Yue 1; Zhao, Ruiming 5
刊名	MARINE AND PETROLEUM GEOLOGY
	2018-04-01
卷号	92 页码:670-684
关键词	Liaohe Basin Natural gas Geochemical characteristics Bacterial oxidation Gas-source correlation
ISSN号	0264-8172
DOI	10.1016/j.marpetgeo.2017.11.028
文献子类	Article
英文摘要	Chemical components, stable isotopic compositions and light hydrocarbons are investigated to determine the origin and isotopic anomalies of natural gases in the Paleogene of the Liaohe Basin of northeastern China. Natural gas in Paleogene is dominated by alkanes. Dry gas predominantly occurs in the shallow layers of the Paleogene having burial depth less than 1900 m, specifically in the Dongying Formation (E(3)d) and the first member of the Shahejie Formation (E(3)s(1)); wet gas mostly occurs in the deep layer, primarily in the third member of the Shahejie Formation (E(2)s(3)). The relative content of methyl cyclohexane in the Western Depression (WD) of the Liaohe Basin is less than that in the Eastern Depression (ED), while the relative contents of alkanes in the C-5.(7) light hydrocarbons of the WD are higher than those of the ED. Natural gases are of multiple origins, including microbial gas (gas generated by microbial action on immature source rock), coal-derived gas (gas generated by humic source rock) and oil-associated gas (gas generated by sapropelic source rock). In the WD, oil-associated gas is dominant, while in the ED, coal-derived gas dominates. The abnormally heavy carbon isotopic composition of Paleogene heavy alkanes is primarily caused by bacteria oxidation, rather than by being mixed with deep source gas. Natural gases from the E(3)d and E(3)s(1) suffer the most severe bacterial oxidation, the intensity of which gradually declines with the increasing depth. The low average heptane and isoheptane values indicate that natural gases are mostly generated in the early mature stage of the source rock. Natural gases in E(2)s(3) of the WD are mainly derived from E(2)s(4) and E(2)s(3) source rocks, while those of E(3)d and E(3)s(1) are predominantly generated by E(2)s(3) source rock. Gases in the ED come principally from E(2)s(3) source rock.
WOS关键词	LIGHT-HYDROCARBONS ; ORDOS BASIN ; GEOCHEMICAL CHARACTERISTICS ; WESTERN DEPRESSION ; NORTHEAST CHINA ; TARIM BASIN ; CRUDE OILS ; SHALE GAS ; FIELD ; PETROLEUM
WOS研究方向	Geology
语种	英语
出版者	ELSEVIER SCI LTD
WOS记录号	WOS:000432760400039
资助机构	PetroChina Petroleum Exploration Major Science and Technology Program "Geochemistry and Accumulation Mechanisms of Coal-derived Gas in China"(2014B-0608) ; PetroChina Petroleum Exploration Major Science and Technology Program "Geochemistry and Accumulation Mechanisms of Coal-derived Gas in China"(2014B-0608) ; National Oil and Gas Project of China(2016ZX05007-01) ; National Oil and Gas Project of China(2016ZX05007-01) ; National Science Foundation Project for Young Scholars of China(41303037) ; National Science Foundation Project for Young Scholars of China(41303037) ; Natural Science Foundation of China(41473020) ; Natural Science Foundation of China(41473020) ; PetroChina Petroleum Exploration Major Science and Technology Program "Geochemistry and Accumulation Mechanisms of Coal-derived Gas in China"(2014B-0608) ; PetroChina Petroleum Exploration Major Science and Technology Program "Geochemistry and Accumulation Mechanisms of Coal-derived Gas in China"(2014B-0608) ; National Oil and Gas Project of China(2016ZX05007-01) ; National Oil and Gas Project of China(2016ZX05007-01) ; National Science Foundation Project for Young Scholars of China(41303037) ; National Science Foundation Project for Young Scholars of China(41303037) ; Natural Science Foundation of China(41473020) ; Natural Science Foundation of China(41473020) ; PetroChina Petroleum Exploration Major Science and Technology Program "Geochemistry and Accumulation Mechanisms of Coal-derived Gas in China"(2014B-0608) ; PetroChina Petroleum Exploration Major Science and Technology Program "Geochemistry and Accumulation Mechanisms of Coal-derived Gas in China"(2014B-0608) ; National Oil and Gas Project of China(2016ZX05007-01) ; National Oil and Gas Project of China(2016ZX05007-01) ; National Science Foundation Project for Young Scholars of China(41303037) ; National Science Foundation Project for Young Scholars of China(41303037) ; Natural Science Foundation of China(41473020) ; Natural Science Foundation of China(41473020) ; PetroChina Petroleum Exploration Major Science and Technology Program "Geochemistry and Accumulation Mechanisms of Coal-derived Gas in China"(2014B-0608) ; PetroChina Petroleum Exploration Major Science and Technology Program "Geochemistry and Accumulation Mechanisms of Coal-derived Gas in China"(2014B-0608) ; National Oil and Gas Project of China(2016ZX05007-01) ; National Oil and Gas Project of China(2016ZX05007-01) ; National Science Foundation Project for Young Scholars of China(41303037) ; National Science Foundation Project for Young Scholars of China(41303037) ; Natural Science Foundation of China(41473020) ; Natural Science Foundation of China(41473020)
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/88267]
专题	中国科学院地质与地球物理研究所
通讯作者	Peng, Weilong
作者单位	1.PetroChina Res Inst Petr Explorat & Dev, Beijing 100083, Peoples R China 2.China Univ Petr, Qingdao 266580, Shandong, Peoples R China 3.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China 4.Delft Univ Technol, Sect Appl Geol, POB 5048,Stevinweg 1, NL-2628 CN Delft, Netherlands 5.CNPC, Bohai Drilling Engn Co Ltd, Downhole Operat Branch Co, Langfang 06500Z, Hebei, Peoples R China
推荐引用方式 GB/T 7714	Peng, Weilong,Hu, Guoyi,Feng, Ziqi,et al. Origin of Paleogene natural gases and discussion of abnormal carbon isotopic composition of heavy alkanes in the Liaohe Basin, NE China[J]. MARINE AND PETROLEUM GEOLOGY,2018,92:670-684.
APA	Peng, Weilong.,Hu, Guoyi.,Feng, Ziqi.,Liu, Dan.,Wang, Youwei.,...&Zhao, Ruiming.(2018).Origin of Paleogene natural gases and discussion of abnormal carbon isotopic composition of heavy alkanes in the Liaohe Basin, NE China.MARINE AND PETROLEUM GEOLOGY,92,670-684.
MLA	Peng, Weilong,et al."Origin of Paleogene natural gases and discussion of abnormal carbon isotopic composition of heavy alkanes in the Liaohe Basin, NE China".MARINE AND PETROLEUM GEOLOGY 92(2018):670-684.