Record details

Title
    The creation of an asymmetric hydraulic fracture as a result of driving stress gradients
Author
    Dahm, T.
    Fischer, Tomáš
    Hainzl, S.
Language
    anglicky
Publication type
    článek v odborném periodiku
Source title - serial
    Geophysical Journal International
Vol./nr.
    Roč. 179, č. 1
Pages
    s. 634-639
Year
    2009
Notes
    Projekt: MTKI-CT-2004-517242, EU, XE3cav_un_auth*0250446
    Rozsah: 6 s.
    Výzkumný záměr: CEZ:AV0Z30120515
Subject category
    downhole methods
    earthquake source observations
    fracture and flow
    geomechanics
Keyword
    Asymmetric
    Creation
    Driving
    Fracture
    Gradients
    Hydraulic
    Result
    Stress
Abstract (in english)
   Hydraulic fracture stimulation is frequently performed in hydrocarbon reservoirs and geothermal systems to increase the permeability of the rock formation. These hydraulic fractures are often mapped by hypocentres of induced microearthquakes. In some cases microseismicity exhibits asymmetry relative to the injection well, which can be interpreted by unequal conditions for fracture growth at opposite sides of the well or by observation effects. Here we investigate the role of the lateral change of the minimum compressive stress. We use a simple model to describe the relation among the lateral stress gradient, the mean viscous pressure gradients in the fracture wings, the fracture geometry, and the net pressure in the fracture.
Contributor
    AV ČR Brno, Geofyzikální ústav
Contributor code
    AV ČR, GFÚ
Source format
    U
Import date
    9. 12. 2013