气候变化领域集成服务门户(CCPortal): The Effect of Mineral Dissolution on the Effective Stress Law for Permeability in a Tight Sandstone

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DOI	10.1029/2020GL088346
	The Effect of Mineral Dissolution on the Effective Stress Law for Permeability in a Tight Sandstone
	Ma J.; Querci L.; Hattendorf B.; Saar M.O.; Kong X.-Z.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:15
英文摘要	We present flow-through experiments to delineate the processes involved in permeability changes driven by effective stress variations and mineral cement dissolution in porous rocks. CO2-enriched brine is injected continuously into a tight sandstone under in situ reservoir conditions for 455 hrs. Due to the dolomite cement dissolution, the bulk permeability of the sandstone specimen significantly increases, and two dissolution passages are identified near the fluid inlet by X-ray CT imaging. Prereaction and postreaction examinations of the effective stress law for permeability suggest that after reaction, the bulk permeability is more sensitive to pore pressure changes and less sensitive to effective stress changes. These observations are corroborated by Scanning Electron Microscopy and X-ray CT observations. This study deepens our understanding of the effect of mineral dissolution on the effective stress law for permeability, with implications for characterizing subsurface mass and energy transport, particularly during fluid injection/production into/from geologic reservoirs. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	Cements; Computerized tomography; Dissolution; Petroleum reservoir engineering; Sandstone; Scanning electron microscopy; Transport properties; X rays; Flow-through experiments; Geologic reservoirs; Mass and energy transport; Mineral dissolution; Permeability change; Reservoir conditions; Sandstone specimen; Tight sandstones; Minerals; brine; dissolution; dolomite; fluid injection; mineral alteration; permeability; pore pressure; porous medium; sandstone
语种	英语
来源期刊	Geophysical Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/169997
作者单位	Geothermal Energy and Geofluids Group, Department of Earth Sciences (D-ERDW), ETH Zurich, Zurich, Switzerland; Laboratory of Inorganic Chemistry, Department of Chemistry and Applied Biosciences (D-CHAB), ETH Zurich, Zurich, Switzerland; Department of Earth and Environmental Sciences, University of Minnesota, Minneapolis, MN, United States
推荐引用方式 GB/T 7714	Ma J.,Querci L.,Hattendorf B.,et al. The Effect of Mineral Dissolution on the Effective Stress Law for Permeability in a Tight Sandstone[J],2020,47(15).
APA	Ma J.,Querci L.,Hattendorf B.,Saar M.O.,&Kong X.-Z..(2020).The Effect of Mineral Dissolution on the Effective Stress Law for Permeability in a Tight Sandstone.Geophysical Research Letters,47(15).
MLA	Ma J.,et al."The Effect of Mineral Dissolution on the Effective Stress Law for Permeability in a Tight Sandstone".Geophysical Research Letters 47.15(2020).