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  | isbn    = 0-89181-602-X

  | isbn    = 0-89181-602-X

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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 solubility in water, black oils and high 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 accumulations lasting for tens to hundreds of million years (e.g., .<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>

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 solubility in water, black oils and high 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 accumulations 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>

==Predicting leakage==

==Predicting leakage==