气候变化领域集成服务门户(CCPortal): Hydrocarbon accumulation processes and mechanisms in Lower Jurassic tight sandstone reservoirs in the Kuqa subbasin, Tarim Basin, northwest China: A case study of the Dibei tight gas field

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DOI	10.1306/09181816529
	Hydrocarbon accumulation processes and mechanisms in Lower Jurassic tight sandstone reservoirs in the Kuqa subbasin, Tarim Basin, northwest China: A case study of the Dibei tight gas field
	Pang X.; Peng J.; Jiang Z.; Yang H.; Wang P.; Jiang F.; Wang K.
发表日期	2019
ISSN	0149-1423
卷号	103 期号:4
英文摘要	The Dibei gas field is a large tight gas field located in the Kuqa subbasin, Tarim Basin, northwestern China. The reservoir is within the Lower Jurassic Ahe Formation (J1a) and has porosity and permeability ranges of 2%–8% and 0.01–1 md, respectively. Two episodes of hydrocarbon charge are identified based on a detailed study of fluid-inclusion petrography and microthermometry, fluorescence spectroscopy characteristics, and the thermal maturity of both gas and light oil. Low-maturity oil as represented by hydrocarbon inclusions with yellow-green fluorescence entered the reservoir circa 23–12 Ma, whereas high-maturity hydrocarbons, as indicated by hydrocarbon inclusions with blue-white fluorescence, have charged the reservoir since 5 Ma. The hydrocarbon charge process combined with porosity evolution determined the present gas–water distribution characteristics in the Dibei gas field. Porosity in the J1a sandstone reservoir was relatively high during the first episode of hydrocarbon charge, which allowed oil to migrate upward and accumulate in structural highs under buoyancy. From 5 Ma to the present, the Dibei gas field experienced strong tectonic compression associated with intense thrust-fault reactivation, causing deformation and oil leakage from the reservoir. Continuous tight sand deposits along the slope areas, located far away from the active faults, became favorable accumulation sites for gas derived from the underlying Triassic source rocks. Hydrocarbon accumulation along the slope area in the Ahe Formation is dominantly controlled by equilibrium between hydrocarbon-generation pressure and capillary pressure. Copyright ©2019. The American Association of Petroleum Geologists. All rights reserved.
语种	英语
scopus关键词	Faulting; Fluorescence; Fluorescence spectroscopy; Gas industry; Gases; Hydrocarbons; Leakage (fluid); Porosity; Sandstone; Tight gas; Water supply systems; Fluid inclusion petrography; Hydrocarbon accumulation; Hydrocarbon generation; Porosity evolutions; Sandstone reservoirs; Tectonic compressions; Tight sandstone reservoirs; Water distributions; Petroleum reservoir engineering; active fault; capillary pressure; detection method; gas field; hydrocarbon generation; hydrocarbon reservoir; Jurassic; leakage; sandstone; source rock; Triassic; China; Kuqa Depression; Tarim Basin; Xinjiang Uygur; Micromesistius poutassou
来源期刊	AAPG Bulletin
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/125025
作者单位	State Key Laboratory for Petroleum Resources and Prospecting, China University of Petroleum (Beijing), Beijing, China; Basin and Reservoir Research Center, China University of Petroleum, Beijing, China; Bureau of Economic Geology, Jackson School of Geosciences, University of Texas at Austin, Austin, TX, United States; PetroChina Tarim Oilfield Company, Korla, China; Petroleum Exploration and Production Research Institute, Sinopec, Beijing, China
推荐引用方式 GB/T 7714	Pang X.,Peng J.,Jiang Z.,et al. Hydrocarbon accumulation processes and mechanisms in Lower Jurassic tight sandstone reservoirs in the Kuqa subbasin, Tarim Basin, northwest China: A case study of the Dibei tight gas field[J],2019,103(4).
APA	Pang X..,Peng J..,Jiang Z..,Yang H..,Wang P..,...&Wang K..(2019).Hydrocarbon accumulation processes and mechanisms in Lower Jurassic tight sandstone reservoirs in the Kuqa subbasin, Tarim Basin, northwest China: A case study of the Dibei tight gas field.AAPG Bulletin,103(4).
MLA	Pang X.,et al."Hydrocarbon accumulation processes and mechanisms in Lower Jurassic tight sandstone reservoirs in the Kuqa subbasin, Tarim Basin, northwest China: A case study of the Dibei tight gas field".AAPG Bulletin 103.4(2019).