气候变化领域集成服务门户(CCPortal): Characteristics of micropores, pore throats, and movable fluids in the tight sandstone oil reservoirs of the Yanchang Formation in the southwestern Ordos Basin, China

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DOI	10.1306/03061917284
	Characteristics of micropores, pore throats, and movable fluids in the tight sandstone oil reservoirs of the Yanchang Formation in the southwestern Ordos Basin, China
	Jiang F.; Zhang C.; Wang K.; Zhao Z.; Zhong K.
发表日期	2019
ISSN	0149-1423
起始页码	2835
结束页码	2859
卷号	103 期号:12
英文摘要	Thin-section analysis, field emission scanning electron microscopy, constant-rate mercury injection (CRMI), X-ray-computed tomography (X-CT), and nuclear magnetic resonance (NMR) were used to investigate pore systems, pore sizes, and pore-throat distributions and determine evaluation criteria for tight oil reservoirs. This research shows that the average porosity of the reservoirs in the Chang 63 to Chang 72 Members of the Yanchang Formation of the Ordos Basin ranges from 4% to 16%, with a corresponding average permeability of 0.1 to 0.4 md. The main pore types in these tight oil reservoirs are dissolution pores and intergranular pores, and the main pore-throat types are laminated throats and control-shaped throats. Based on experimental results, the pore-throat distributions differ among different testing techniques. The results of this study indicate that a combination of CRMI-derived and X-CT-detected pore-throat distributions is most suitable for calibrating NMR-derived pore sizes over the full range of pore sizes. The lower pore-throat radius limit of effective reservoirs is 0.24 mm, and the lower permeability limit for the flow of movable fluid is 0.008 md. Based on a cluster analysis, the studied tight oil reservoirs can be divided into three types. Compared with type III reservoirs (porosity < 8% and 0.008 md < permeability < 0.05 md), type I (porosity > 11% and permeability > 0.15 md) and type II (8% < porosity < 11% and 0.05 md < permeability < 0.15 md) reservoirs are of relatively good quality. © 2019 The American Association of Petroleum Geologists. All rights reserved.
关键词	Cluster analysis Computerized tomography Field emission microscopes Metamorphic rocks Nuclear magnetic resonance Petroleum reservoir evaluation Pore size Scanning electron microscopy Testing Textures Average permeability Effective reservoir Evaluation criteria Field emission scanning electron microscopy Intergranular pores Nuclear magnetic resonance(NMR)Ordos basin , China X-ray computed tomography Petroleum reservoirs argillaceous deposit experimental study fluid injection hydrocarbon exploration hydrocarbon reservoir mercury (element)permeability pore pressure pore space sandstone shale gas China Ordos Basin
语种	英语
来源机构	AAPG Bulletin
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/131693
推荐引用方式 GB/T 7714	Jiang F.,Zhang C.,Wang K.,et al. Characteristics of micropores, pore throats, and movable fluids in the tight sandstone oil reservoirs of the Yanchang Formation in the southwestern Ordos Basin, China[J]. AAPG Bulletin,2019,103(12).
APA	Jiang F.,Zhang C.,Wang K.,Zhao Z.,&Zhong K..(2019).Characteristics of micropores, pore throats, and movable fluids in the tight sandstone oil reservoirs of the Yanchang Formation in the southwestern Ordos Basin, China.,103(12).
MLA	Jiang F.,et al."Characteristics of micropores, pore throats, and movable fluids in the tight sandstone oil reservoirs of the Yanchang Formation in the southwestern Ordos Basin, China".103.12(2019).