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Geomechanical investigation of microseismicity during hydraulic fracture interaction with a preexisting fault

Shawn C. Maxwell, Jim Hazzard and Will Pettitt
Geomechanical investigation of microseismicity during hydraulic fracture interaction with a preexisting fault (in Geomechanics, Longyi Li (prefacer), Douglas Foster (prefacer), Marisela Sanchez-Nagel (prefacer), Mark Tingay (prefacer) and James Verdon (prefacer))
Leading Edge (Tulsa, OK) (May 2018) 37 (5): 362-366

Abstract

We discuss characteristics of geomechanically modeled microseismicity in a scenario of hydraulic fracture activation of a preexisting fault. This modeling example represents a geomechanical tutorial of the fault activation in a relatively simple scenario, which may be of use when interpreting microseismic imaging and induced seismicity field data. The model confirms the expected result of induced shear slip when the hydraulic fracture intersects the fault. However, a subtle asymmetry in fault slip and associated onset of the microseismicity occurs due to stress shadowing around the hydraulic fracture. Although the modeled microseismicity along the fault is predominantly associated with a shear mechanism, localized dilation of the fault introduces a relatively small fault-opening component for small-magnitude microseismicity. Finally, episodic clusters of microseismicity were found as the area of fault activation grew. This was associated with an initial slip event and subsequent redistributions on localized segments of the fault.


ISSN: 1070-485X
EISSN: 1938-3789
Serial Title: Leading Edge (Tulsa, OK)
Serial Volume: 37
Serial Issue: 5
Title: Geomechanical investigation of microseismicity during hydraulic fracture interaction with a preexisting fault
Title: Geomechanics
Author(s): Maxwell, Shawn C.Hazzard, JimPettitt, Will
Author(s): Li, Longyiprefacer
Author(s): Foster, Douglasprefacer
Author(s): Sanchez-Nagel, Mariselaprefacer
Author(s): Tingay, Markprefacer
Author(s): Verdon, Jamesprefacer
Affiliation: Itasca-IMaGE, United States
Affiliation: University of Texas at Austin, Austin, TX, United States
Pages: 362-366
Published: 20180501
Text Language: English
Publisher: Society of Exploration Geophysicists, Tulsa, OK, United States
References: 4
Accession Number: 2018-077578
Categories: Economic geology, geology of energy sources
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus.
Secondary Affiliation: Itasca Consulting Group, USA, United States
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2018, American Geosciences Institute. Reference includes data from GeoScienceWorld, Alexandria, VA, United States
Update Code: 2018
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