Presentation - Halliburton

On the Horizon… Air Quality
Conventional resources generally exist in discrete, well-defined subsurface
accumulations (reservoirs), with permeability values greater than a specified
lower limit. Such conventional gas resources can usually be developed using
vertical wells, and often yield economic recovery rates of more than 80% of
the Gas Initially in Place (GIIP). By contrast, unconventional resources are
found in accumulations where permeability is low. Such accumulations
include “tight” sandstone formations, coal-beds, and shale formations.
Unconventional resource accumulations tend to be distributed over a much
larger area than conventional accumulations and usually require well
stimulation in order to be economically productive; recovery factors are much
lower — typically of the order of 15% to 30% of GIIP” (MIT, 2010).
Wood, Ruth et al. Shale Gas: A Provisional Assessment of Climate Change and Environmental Impacts. January 2011.
MIT (2010) The future of natural gas, an interdisciplinary study the Massachusetts Institute of Technology’s Energy Initiative
ISBN (978-0-9828008-0-5 Copyright MIT 2010.
© 2012 HALLIBURTON. ALL RIGHTS RESERVED.
46