Origin of late charged gas and its effect on property of oils in the Ordovician in Tazhong area

doi:10.1016/j.petrol.2014.06.020

	Origin of late charged gas and its effect on property of oils in the Ordovician in Tazhong area
	Wang, Zhaoming 1; Cai, Chunfang 2,3; Li, HongXia 3; Yang, Haijun 1; Wang, Tiankai 3; Zhang, Ke 1; Jia, Lianqi 3; Chen, Kun 2
刊名	JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
	2014-10-01
卷号	122 页码:83-93
关键词	methane carbon isotope gas washing paraffin wax Tarim basin
ISSN号	0920-4105
DOI	10.1016/j.petrol.2014.06.020
文献子类	Article
英文摘要	Natural gases in Ordovician reservoirs of the Tazhong area of the Tarim Basin appear derived by oil-cracking gas. The gases show very different geochemical characteristics. Most of the gases in the middle and eastern part of the No. 1 fault-slope zone are characterized by high gas dryness coefficients and have methane delta C-13(1) values heavier than primary gas. These features are different from gases in the western part of the No. 1 fault-slope zone. Thus, we propose that there existed mixing between more mature, C-13-rich methane dominated gas and less mature wet gas with C-13-depleted methane. The hypothesis is supported by (1) roughly a positive correlation between the gas dryness coefficient and methane delta C-13(1) value, (2) significantly heavier delta C-13(1) values in the eastern part of the study area than in the west, and (3) significantly heavier delta C-13(1) values than anticipated for unaltered gas co-generated with C-2-C-4. The charge and mixing of the dry gas into the Ordovician pools may have resulted in increase in wax contents of the oils, gas/oil ratios, gas dryness coefficients and methane delta C-13 values, leading to a positive correlation between gas/oil ratio and paraffin wax content as a result of continuous fractionation and removal of light components of an oil with progressive gas influx and thus gas washing. (C) 2014 Elsevier B.V. All rights reserved.
WOS关键词	THERMOCHEMICAL SULFATE REDUCTION ; TARIM BASIN ; NATURAL-GAS ; GEOCHEMICAL CHARACTERISTICS ; HYDROCARBON GASES ; CHINA ; PETROLEUM ; CARBONATES ; MARINE ; UPLIFT
WOS研究方向	Energy & Fuels ; Engineering
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000345182300009
资助机构	China National Funds for Distinguished Young Scientists(41125009) ; China National Funds for Distinguished Young Scientists(41125009) ; Special Major Project on Petroleum Study(2011ZX05008-003) ; Special Major Project on Petroleum Study(2011ZX05008-003) ; China National Funds for Distinguished Young Scientists(41125009) ; China National Funds for Distinguished Young Scientists(41125009) ; Special Major Project on Petroleum Study(2011ZX05008-003) ; Special Major Project on Petroleum Study(2011ZX05008-003) ; China National Funds for Distinguished Young Scientists(41125009) ; China National Funds for Distinguished Young Scientists(41125009) ; Special Major Project on Petroleum Study(2011ZX05008-003) ; Special Major Project on Petroleum Study(2011ZX05008-003) ; China National Funds for Distinguished Young Scientists(41125009) ; China National Funds for Distinguished Young Scientists(41125009) ; Special Major Project on Petroleum Study(2011ZX05008-003) ; Special Major Project on Petroleum Study(2011ZX05008-003)
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/84890]
专题	中国科学院地质与地球物理研究所
通讯作者	Cai, Chunfang
作者单位	1.PetroChina, Tarim Oilfield Co, Res Inst Petr Explorat & Dev, Korla 841000, Xinjiang, Peoples R China 2.PetroChina, Tarim Oilfield Co, Res Inst Petr Explorat & Dev, Korla 841000, Xinjiang, Peoples R China 3.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Petr Resources Res, Beijing 100029, Peoples R China
推荐引用方式 GB/T 7714	Wang, Zhaoming,Cai, Chunfang,Li, HongXia,et al. Origin of late charged gas and its effect on property of oils in the Ordovician in Tazhong area[J]. JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING,2014,122:83-93.
APA	Wang, Zhaoming.,Cai, Chunfang.,Li, HongXia.,Yang, Haijun.,Wang, Tiankai.,...&Chen, Kun.(2014).Origin of late charged gas and its effect on property of oils in the Ordovician in Tazhong area.JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING,122,83-93.
MLA	Wang, Zhaoming,et al."Origin of late charged gas and its effect on property of oils in the Ordovician in Tazhong area".JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING 122(2014):83-93.