Tight gas

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{{#badges: FrackSwarm|Navbar-fracking}} While shale gas is natural gas extracted from rock shale, tight gas describes natural gas that is dispersed within low-porosity silt or sand areas. Tight gas is defined in the U.S. as having less than 10 percent porosity and less than 0.1 millidarcy permeability.[1] Tight gas is held in pores up to 20,000 times narrower than a human hair.[2]

In general, the same drilling and completion technology used with shale gas - fracking - is also used to access and extract tight gas.[3]


  1. Ben E. Law and Charles W. Spencer, 1993, "Gas in tight reservoirs-an emerging major source of energy," in David G. Howell (ed.), The Future of Energy Gasses, US Geological Survey, Professional Paper 1570, p.233-252.
  2. "Understanding Tight and Shale Gas," Shell website, accessed April 2013.
  3. McCoy, Mark; W. Neal Sams (2007). Tight Gas Reservoir Simulation: Modeling Discrete Irregular Strata-Bound Fracture Networks and Network Flow, Including Dynamic Recharge from the Matrix. National Energy Technology Laboratory. Retrieved on 27 October 2011.

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Wikipedia also has an article on natural gas. This article may use content from the Wikipedia article under the terms of the GFDL.