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DOI10.1306/12171818041
Charging of Carboniferous volcanic reservoirs in the eastern Chepaizi uplift, Junggar Basin (northwestern China) constrained by oil geochemistry and fluid inclusion
Chang, Xiangchun1,2; Wang, Yue1; Shi, Bingbing1; Xu, Youde3
2019-07-15
发表期刊AAPG BULLETIN
ISSN0149-1423
EISSN1558-9153
出版年2019
卷号103期号:7页码:1625-1652
文章类型Article
语种英语
国家Peoples R China
英文摘要

Substantial amounts of petroleum were recently discovered in the Carboniferous andesite, tuff, breccia, and basalt reservoirs of the Chepaizi uplift in the western Junggar Basin. However, the charging history of the Carboniferous petroleum reservoir is poorly understood. Oil-oil correlation studies indicate that all of the oils were mainly derived from the middle Permian Wuerhe Formation source rocks, possibly mixed with a small contribution from Carboniferous Baogutu Formation source rocks in the neighboring Changji sag. Based on the petrographic and micro-thermometry of fluid inclusions, two hydrocarbon charging episodes are defined; these episodes were characterized by a low-peak-range homogenization temperature (Th) distribution (80 degrees C-90 degrees C) and high salinity (13.22-13.42 wt. % NaCl) and a high-peak-range Th distribution (120 degrees C-130 degrees C) and low salinity (4.89-11.72 wt. % NaCl), respectively. Through one-dimensional basin modeling and pressure-volume-temperature-composition simulation, the burial-thermal histories for wells P61, P66, P668, and P663 were reconstructed, and their trapping temperatures of the hydrocarbon inclusions were calculated to be higher than their corresponding highest paleotemperature (i.e., 56.8 degrees C, 53.7 degrees C, 60.9 degrees C, and 58.1 degrees C, respectively), implying fast hydrocarbon charging processes promoted by deep hydrothermal fluids. Associated with the hydrocarbon generation history, sealing process of the Hongche fault, and regional tectonic evolution, these two hydrocarbon charging events were deduced as the adjustments of oils previously accumulated along the Hongche fault zone, because of the tectonic extension in the Paleogene and regional tilting in the Neogene, respectively. The general direction of oil charging was traced from south to north and from east to west, as indicated by the molecular parameters of nitrogen-bearing compounds and C-20 + C-21 triaromatic steroids/C-20 + C-21 + C-26 -C-28 triaromatic steroids (TA(I)/TA(I+II)), which roughly coincided with the active fracturing.


领域地球科学
收录类别SCI-E
WOS记录号WOS:000475472700005
WOS关键词ORGANIC GEOCHEMISTRY ; FORELAND BASIN ; SOURCE ROCKS ; TARIM BASIN ; CRUDE OILS ; FAULT ZONE ; NW CHINA ; PETROLEUM ; MIGRATION ; MATURITY
WOS类目Geosciences, Multidisciplinary
WOS研究方向Geology
引用统计
文献类型期刊论文
条目标识符http://119.78.100.173/C666/handle/2XK7JSWQ/184961
专题地球科学
作者单位1.Shandong Univ Sci & Technol, Coll Earth Sci & Engn, Qingdao, Shandong, Peoples R China;
2.Qingdao Natl Lab Marine Sci & Technol, Lab Marine Mineral Resources, Qingdao, Shandong, Peoples R China;
3.Sinopec, Shengli Oil Co, Res Inst Petr Explorat & Dev, Dongying, Peoples R China
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Chang, Xiangchun,Wang, Yue,Shi, Bingbing,et al. Charging of Carboniferous volcanic reservoirs in the eastern Chepaizi uplift, Junggar Basin (northwestern China) constrained by oil geochemistry and fluid inclusion[J]. AAPG BULLETIN,2019,103(7):1625-1652.
APA Chang, Xiangchun,Wang, Yue,Shi, Bingbing,&Xu, Youde.(2019).Charging of Carboniferous volcanic reservoirs in the eastern Chepaizi uplift, Junggar Basin (northwestern China) constrained by oil geochemistry and fluid inclusion.AAPG BULLETIN,103(7),1625-1652.
MLA Chang, Xiangchun,et al."Charging of Carboniferous volcanic reservoirs in the eastern Chepaizi uplift, Junggar Basin (northwestern China) constrained by oil geochemistry and fluid inclusion".AAPG BULLETIN 103.7(2019):1625-1652.
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