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DOI	10.1306/07062017116
	Comparison of diagenetic characteristics and pore evolution in outcrops and cores of tight sandstone reservoirs in the Triassic Yanchang Formation; the Ordos Basin; China
	Hu Z.; Zheng H.; Yin W.; Liu C.; Sun C.; Xiao C.; Wang F.; Li S.; Chen C.
发表日期	2020
ISSN	0149-1423
起始页码	2429
结束页码	2452
卷号	104 期号:11
英文摘要	The sedimentary and diagenetic control on tight sandstone reservoir quality is a key focus of hydrocarbon exploration. This paper compares reservoir characteristics, such as diagenetic processes, pore types, and porosity evolution, of cores and outcrops of the Yanchang Formation, the Ordos Basin, northwestern China, to identify diagenetic trends and processes responsible for improving reservoir quality and to develop a model for identifying reservoir sweet spots in tight sandstone formations. Samples of the Yanchang Formation sandstone are taken from wells and adjacent outcrops in the Ordos Basin. No significant differences were found in porosity-destructive diagenesis such as compaction and cementation between the core and outcrop samples. However, the effects of dissolution are far more pronounced in cores than in the outcrop, resulting in a higher core sample porosity. High-density sampling of the outcrop revealed that the reservoir sweet-spot model is controlled by sedimentation, whereas three distinct vertical diagenetic zones were identified in adjacent wells. A comprehensive analysis of cores and outcrop samples shows that both areas experienced similar sedimentation and early diagenetic patterns. However, the diagenetic processes experienced by core and outcrop sandstones diverged during the later part of burial and uplift, with dissolution being responsible for the contrasting reservoir porosities between core and outcrop. Copyright © 2020. The American Association of Petroleum Geologists. All rights reserved.
英文关键词	Dissolution; Metamorphic rocks; Petroleum prospecting; Porosity; Quality control; Sandstone; Sedimentology; Tight gas; Comprehensive analysis; Diagenetic process; Hydrocarbon exploration; Ordos basin , China; Porosity evolutions; Reservoir characteristic; Reservoir porosity; Tight sandstone reservoirs; Core samples; comparative study; diagenesis; dissolution; outcrop; pore space; porosity; sampling; sandstone; sedimentation; China; Ordos Basin
语种	英语
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/168678
作者单位	State Key Laboratory of Shale Oil and Gas Enrichment Mechanism and Effective Development, Sinopec Key Laboratory of Shale Oil and Gas, Petroleum Exploration and Production Research Institute, Sinopec, Beijing, China; Petroleum Exploration and Production Research Institute, Sinopec, Beijing, China; Datalog Geological Services, Houston, TX, United States; Sinopec North China Exploration and Production Company, Zhengzhou, China
推荐引用方式 GB/T 7714	Hu Z.,Zheng H.,Yin W.,et al. Comparison of diagenetic characteristics and pore evolution in outcrops and cores of tight sandstone reservoirs in the Triassic Yanchang Formation; the Ordos Basin; China[J],2020,104(11).
APA	Hu Z..,Zheng H..,Yin W..,Liu C..,Sun C..,...&Chen C..(2020).Comparison of diagenetic characteristics and pore evolution in outcrops and cores of tight sandstone reservoirs in the Triassic Yanchang Formation; the Ordos Basin; China.AAPG Bulletin,104(11).
MLA	Hu Z.,et al."Comparison of diagenetic characteristics and pore evolution in outcrops and cores of tight sandstone reservoirs in the Triassic Yanchang Formation; the Ordos Basin; China".AAPG Bulletin 104.11(2020).