气候变化领域集成服务门户(CCPortal): Experimental Investigation of Hydraulic Fracturing and Stress Sensitivity of Fracture Permeability Under Changing Polyaxial Stress Conditions

CCPortal

DOI	10.1029/2020JB020044
	Experimental Investigation of Hydraulic Fracturing and Stress Sensitivity of Fracture Permeability Under Changing Polyaxial Stress Conditions
	Fraser-Harris A.P.; McDermott C.I.; Couples G.D.; Edlmann K.; Lightbody A.; Cartwright-Taylor A.; Kendrick J.E.; Brondolo F.; Fazio M.; Sauter M.
发表日期	2020
ISSN	21699313
卷号	125 期号:12
英文摘要	Understanding and predicting fracture propagation and subsequent fluid flow characteristics is critical to geoenergy technologies that engineer and/or utilize favorable geological conditions to store or extract fluids from the subsurface. Fracture permeability decreases nonlinearly with increasing normal stress, but the relationship between shear displacement and fracture permeability is less well understood. We utilize the new Geo-Reservoir Experimental Analogue Technology (GREAT cell), which can apply polyaxial stress states and realistic reservoir temperatures and pressures to cylindrical samples and has the unique capability to alter both the magnitude and orientation of the radial stress field by increments of 11.25° during an experiment. We load synthetic analogue materials and real rock samples to stress conditions representative of 500–1,000 m depth, investigate the hydraulic stimulation process, and then conduct flow experiments while changing the fluid pressure and the orientation of the intermediate and minimum principal stresses. High-resolution circumferential strain measurements combined with fluid pressure data indicate fracture propagation can be both stable (no fluid pressure drop) and unstable (fluid pressure drop). The induced fractures exhibit both opening and shear displacements during their creation and/or during fluid flow with changing radial stress states. Flow tests during radial stress field rotation reveal that fracture normal effective stress has first-order control on fracture permeability but increasing fracture offset can lead to elevated permeabilities at maximum shear stress. The results have implications for our conceptual understanding of fracture propagation as well as fluid flow and deformation around fractures. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	fracture fluid flow; hydraulic stimulation; permeability; polyaxial stress; triaxial stress; true-triaxial stress
语种	英语
来源期刊	Journal of Geophysical Research: Solid Earth
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/187442
作者单位	School of Geosciences, University of Edinburgh, Edinburgh, United Kingdom; Institute for GeoEnergy Engineering, Heriot Watt University, Edinburgh, United Kingdom; Now at Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, Menlo Park, CA, United States; Department of Applied Geology, Geoscience Centre of the University of Göttingen, Göttingen, Germany
推荐引用方式 GB/T 7714	Fraser-Harris A.P.,McDermott C.I.,Couples G.D.,et al. Experimental Investigation of Hydraulic Fracturing and Stress Sensitivity of Fracture Permeability Under Changing Polyaxial Stress Conditions[J],2020,125(12).
APA	Fraser-Harris A.P..,McDermott C.I..,Couples G.D..,Edlmann K..,Lightbody A..,...&Sauter M..(2020).Experimental Investigation of Hydraulic Fracturing and Stress Sensitivity of Fracture Permeability Under Changing Polyaxial Stress Conditions.Journal of Geophysical Research: Solid Earth,125(12).
MLA	Fraser-Harris A.P.,et al."Experimental Investigation of Hydraulic Fracturing and Stress Sensitivity of Fracture Permeability Under Changing Polyaxial Stress Conditions".Journal of Geophysical Research: Solid Earth 125.12(2020).