干旱区生态环境知识资源中心(Arid): Lake basin evolution from early to Middle Permian and origin of Triassic Baikouquan oil in the western margin of Mahu Sag, Junggar Basin, China: Evidence from geochemistry

Arid

DOI	10.1016/j.petrol.2021.108612
	Lake basin evolution from early to Middle Permian and origin of Triassic Baikouquan oil in the western margin of Mahu Sag, Junggar Basin, China: Evidence from geochemistry
	Xiao, Zhenglu; Chen, Shijia; Liu, Chaowei; Lu, Zixing; Zhu, Jiang; Han, Meimei
通讯作者	Chen, SJ (corresponding author), 8 Xindu Rd, Chengdu 610500, Peoples R China.
来源期刊	JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
ISSN	0920-4105
EISSN	1873-4715
出版年	2021
卷号	203
英文摘要	Large-scale oil and gas fields have been discovered after years of petroleum exploration in Mahu Sag, Junggar Basin, confirming the significant resource potential in its western margin. However, the origin of oil in the Triassic Baikouquan (T1b) reservoir and lacustrine basin evolution during the Permian are still poorly understood. In this study, Permian source rocks and T1b crude oil were analyzed using Rock-Eval pyrolysis, vitrinite reflectance, stable carbon isotopes, and biomarker compositions. Results show that the Lower Wuerhe source rock (P2w) was developed in a freshwater lacustrine environment with high oxygen content, higher plant input, and now contains typical humic (type-III) kerogen at the low thermal maturity stage. The Fengcheng source rock (P1f) was developed in an evaporative lake after mixed seawater (sea and lake). Deposition included anoxic conditions, terrigenous input, high salinity, and intense evaporation, and was dominated by sapropelic (type-II) kerogen, which is currently at the thermal maturity stage. The Jiamuhe source rock (P1j) was developed in a transitional marine and terrigenous environment with terrigenous input, moderate salinity, and reducing water, and now contains mainly type-III kerogen at the high thermal maturity stage. The Junggar region's climate was humid-arid-humid for the Early to Middle Permian. Mahu Sag was not completely closed until the end of P1j deposition and did not completely evolve into a lacustrine basin with large-scale freshwater input until the P2w deposition. Crude oil of the T1b formation is very mature and is derived from the source rock of the transitional marine and terrigenous environments deposited in the center of Mahu Sag, with high salt content, weak reducibility, and low evaporite content. Using biomarkers, carbon isotopes, and fine lithologic analysis, the oilsource correlation shows that T1b crude oil came from P1f calcareous and tuffaceous source rocks.
英文关键词	Basin evolution Baikouquan formation Geochemistry Jungger basin Mahu sag Oil source
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000656871300002
WOS关键词	CRUDE OILS ; DEPOSITIONAL-ENVIRONMENTS ; FENGCHENG FORMATION ; TECTONIC EVOLUTION ; THERMAL MATURITY ; SICHUAN BASIN ; NATURAL-GAS ; MIXED OILS ; AREA ; ISOMERIZATION
WOS类目	Energy & Fuels ; Engineering, Petroleum
WOS研究方向	Energy & Fuels ; Engineering
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/368603
作者单位	[Xiao, Zhenglu; Chen, Shijia] State Key Lab Oil & Gas Reservoir Geol & Exploita, Chengdu 610500, Peoples R China; [Xiao, Zhenglu; Chen, Shijia; Zhu, Jiang; Han, Meimei] Southwest Petr Univ, Sch Geosci & Technol, Chengdu 610500, Peoples R China; [Liu, Chaowei] PetroChina Xinjiang Oilfield Co, Res Inst Explorat & Dev, Karamay 834000, Peoples R China; [Lu, Zixing] PetroChina Changqing Oilfield Co, Res Inst Explorat & Dev, Xian 710018, Peoples R China
推荐引用方式 GB/T 7714	Xiao, Zhenglu,Chen, Shijia,Liu, Chaowei,et al. Lake basin evolution from early to Middle Permian and origin of Triassic Baikouquan oil in the western margin of Mahu Sag, Junggar Basin, China: Evidence from geochemistry[J],2021,203.
APA	Xiao, Zhenglu,Chen, Shijia,Liu, Chaowei,Lu, Zixing,Zhu, Jiang,&Han, Meimei.(2021).Lake basin evolution from early to Middle Permian and origin of Triassic Baikouquan oil in the western margin of Mahu Sag, Junggar Basin, China: Evidence from geochemistry.JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING,203.
MLA	Xiao, Zhenglu,et al."Lake basin evolution from early to Middle Permian and origin of Triassic Baikouquan oil in the western margin of Mahu Sag, Junggar Basin, China: Evidence from geochemistry".JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING 203(2021).