气候变化领域集成服务门户(CCPortal): A critical review on pore to continuum scale imaging techniques for enhanced shale gas recovery

CCPortal

DOI	10.1016/j.earscirev.2021.103638
	A critical review on pore to continuum scale imaging techniques for enhanced shale gas recovery
	Chandra D.; Vishal V.
发表日期	2021
ISSN	0012-8380
卷号	217
英文摘要	Imaging and image analysis of shale provides insights into the pore and fracture networks, disposition of compositional elements, and signatures of diagenesis and fluid flow. Extraction of features and reconstruction to get highly accurate models of shales using image analysis involves various techniques and tools. The present paper reviews different 3D and 2D imaging methods, their advantages, and limitations, along with recommendations on making the most appropriate choice for visualization of desired features and their applications. While fractures and other elements of deformation can be well resolved using X-ray CT, the FIB-SEM is a better suited 3D imaging tool for resolving the nano-scale pore attributes of shale. Among 2D imaging methods, TEM can provide direct information on the micropores (<2 nm), which cannot be obtained using SEM imaging. The paper discusses guidelines on filtering, thresholding, and optimization, with a special emphasis on image segmentation and feature extraction that may be selected based on the problem definition. It was found that adopting multiple imaging methods can provide a plethora of complementary attributes; however, the scale of observation can vary up to three orders of magnitude, which may lead to inaccurate upscaling. Experimental methods such as low-pressure gas adsorption, NMR, and small-angle scattering can not only validate the results of imaging but also extend the range of identification of pore characteristics to deliver a highly comprehensive understanding of shales. Choice of imaging tools and their combinations, appropriate sample preparation protocols, application of machine learning and advanced numerical simulation, and validation with native sub-surface will remain key to the applicability of imaging in unlocking the full potential of shale as a reservoir. © 2021 Elsevier B.V.
英文关键词	Digital reconstruction; Flow modeling; Image analysis; Imaging; Pore network modeling; Shale
语种	英语
scopus关键词	critical analysis; digital image; enhanced oil recovery; flow modeling; image analysis; imaging method; porosity; shale gas
来源期刊	EARTH-SCIENCE REVIEWS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/209309
作者单位	Computational and Experimental Geomechanics Laboratory, Department of Earth Sciences, Indian Institute of Technology Bombay, Mumbai, 400076, India; Department of Civil Engineering, Faculty of Engineering, Monash University, Clayton, Melbourne, Victoria 3800, Australia; Interdisciplinary Programme in Climate Studies, Indian Institute of Technology Bombay, Mumbai, 400076, India
推荐引用方式 GB/T 7714	Chandra D.,Vishal V.. A critical review on pore to continuum scale imaging techniques for enhanced shale gas recovery[J],2021,217.
APA	Chandra D.,&Vishal V..(2021).A critical review on pore to continuum scale imaging techniques for enhanced shale gas recovery.EARTH-SCIENCE REVIEWS,217.
MLA	Chandra D.,et al."A critical review on pore to continuum scale imaging techniques for enhanced shale gas recovery".EARTH-SCIENCE REVIEWS 217(2021).