Changes

  | isbn    = 0-89181-602-X

  | isbn    = 0-89181-602-X

}}

}}

[http://www.glossary.oilfield.slb.com/en/Terms/n/natural_gas.aspx Natural gas] can dissolve in water to a significant enough degree that diffusion through water in the [[seal]] rock can result in substantial loss of gas, given geological time. Because of their very low [[Wikipedia:Solubility|solubility]] in water, [[black oil]]s and high [[Wikipedia:Molecular mass|molecular-weight]] components of oil cannot leak by this mechanism, even at high temperatures.<ref name=ch11r23>McAuliffe, C., D., 1980, [http://archives.datapages.com/data/specpubs/geochem1/data/a029/a029/0001/0050/0089.htm Oil and gas migration: chemical and physical constraints], in Roberts, W., Cordell, R., eds., Problems of Petroleum Migration: AAPG Studies in Geology 10, p. 89–108.</ref> Leakage rates determined in various published studies demonstrate the likelihood of gas [[accumulation]]s lasting for tens to hundreds of million years (e.g., Motel et al.<ref name=ch11r26>Montel, F., Caillet, G., Pucheu, A., Caltagirone, J., 1993, Diffusion model for predicting reservoir gas losses: Marine and Petroleum Geology, vol. 10, p. 51–57., 10., 1016/0264-8172(93)90099-E</ref>

[http://www.glossary.oilfield.slb.com/en/Terms/n/natural_gas.aspx Natural gas] can dissolve in water to a significant enough degree that diffusion through water in the [[seal]] rock can result in substantial loss of gas, given geological time. Because of their very low [[Wikipedia:Solubility|solubility]] in water, [[black oil]]s and high [[Wikipedia:Molecular mass|molecular-weight]] components of oil cannot leak by this mechanism, even at high temperatures.<ref name=ch11r23>McAuliffe, C. D., 1980, [http://archives.datapages.com/data/specpubs/geochem1/data/a029/a029/0001/0050/0089.htm Oil and gas migration: chemical and physical constraints], in W. Roberts, and R. Cordell, eds., Problems of Petroleum Migration: AAPG Studies in Geology 10, p. 89–108.</ref> Leakage rates determined in various published studies demonstrate the likelihood of gas [[accumulation]]s lasting for tens to hundreds of million years (e.g., Montel et al.<ref name=ch11r26>Montel, F., G. Caillet, A. Pucheu, and J. Caltagirone, 1993, Diffusion model for predicting reservoir gas losses: Marine and Petroleum Geology, vol. 10, p. 51–57., 10., 1016/0264-8172(93)90099-E</ref>

==Predicting leakage==

==Predicting leakage==