NDLI: Modeling the hydromechanical responses of sandwich structure faults during underground fluid injection

Content Provider	Springer Nature Link
Author	Wei, Xiaochen Li, Qi Li, Xiaying Niu, Zhiyong
Copyright Year	2016
Abstract	Injection or withdrawal of fluid at depth may trigger felt seismicity. At a site with natural faults or artificial fracturing cracks, understanding how to avoid triggering felt earthquakes plays a crucial role in the success of underground anthropogenic activities, such as subsurface energy storage and CO$_{2}$ geological sequestration. With the application of a hydromechanical coupling finite element model, we examine the potential of injection-induced pore pressure change and the responding fault slippage along the fault surface in two injection scenarios: multi-layer injection (MLI) and single-layer injection (SLI). The results indicate that fault slippage buildup is mainly located along the portion of the fault intersecting the reservoir. MLI leads to a relatively lower level of induced seismicity compared with SLI. In the fault zone, the external zone and core of the fault exert a connection effect and barrier effect on the hydraulic connectivity, respectively. After 20 years of injection, the pore pressure in the core presents a smaller change than that in the internal and external zones. Furthermore, an uncertainty analysis was performed to evaluate the statistical significance of permeability in the caprock, reservoir, and fault (core, internal zone, and external zone), and only the permeability in the reservoir significantly affects the level of fault slippage based on the fault zone hydromechanics associated with subsurface energy storage and CO$_{2}$ geological sequestration.
Starting Page	1
Ending Page	15
Page Count	15
File Format	PDF
ISSN	18666280
Journal	Environmental Earth Sciences
Volume Number	75
Issue Number	16
e-ISSN	18666299
Language	English
Publisher	Springer Berlin Heidelberg
Publisher Date	2016-08-10
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	CO$_{2}$ geological storage Pore pressure change Fault slippage Induced seismicity Uncertainty analysis Subsurface injection Geology Hydrology/Water Resources Geochemistry Environmental Science and Engineering Terrestrial Pollution Biogeosciences
Content Type	Text
Resource Type	Article
Subject	Global and Planetary Change Earth-Surface Processes Soil Science Environmental Chemistry Pollution Geology Water Science and Technology

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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