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...method of transport is either through direct transport by the water or by diffusion through the water. Reservoirs formed by this type of [[Hydrocarbon migratio ==Migration by diffusion==

==Gas loss by diffusion== ...ant in entrapment of gas, diffusion coefficients for oil are so small that diffusion does not affect seal capacity relative to oil.

...name=ch11r26>Montel, F., G. Caillet, A. Pucheu, and J. Caltagirone, 1993, Diffusion model for predicting reservoir gas losses: Marine and Petroleum Geology, vo ...can be destroyed by diffusive leakage. For most seal lithologies, loss by diffusion is very slow; so most gas accumulations are preserved for tens to hundreds

| Diffusion ==Diffusion transport rate==

...stance from origin. After Klimenko.<ref name=ch07r3>Klimenko, A. P., 1983, Diffusion of gasses from hydrocarbon deposits, in Petroleum Geochemistry, Genesis, an ...]] process. [[:file:migration-of-petroleum_fig7-2.png|Figure 2]] shows the diffusion of gas in water as a function of concentration at origin and distance from

* [http://en.wikipedia.org/wiki/Diffusion Diffusion] can cause loss of large volumes of gas but not oil through a top seal.

...nd nonradioactive isotopes, its durability, and its resistance to isotopic diffusion.<ref name="Watson Wark Thomas 2006">Watson, E. B., D. A. Wark, & J. B. Thom ...(1): 469-500. doi:10.2113/0530469. Retrieved 29 November 2014.</ref> Slow diffusion rates also prevent contamination by leaking or loss of isotopes from the cr

...ponents through pores and causes either leaching or cementation of grains. Diffusion also moves chemicals in and out of rocks, although at significantly lower r

...the fluids are [[gravity]], [[Capillary pressure|capillary]], [[molecular diffusion]], [[thermal convection]], and pressure gradients. It is generally assumed | colspan=2 align="center" | Diffusion coefficients

...molecular sieve solid. By difference in gas solubility or by differential diffusion, the gas mixture becomes separated by molecular weight into its components,

...lization cannot proceed spontaneously because it is limited by solid state diffusion. Continued stabilization can occur as a result of solution-reprecipitation

# diffusion of the gas through the micropores of the coal matrix, and

...f investigation. The wave propagation concept is applied together with the diffusion equation to design the EM system.

...the presence of water. PVC containers are not optimal because they permit diffusion of water and oxygen.<ref name=Basan_etal_1988 /> Glass containers are excel

...l and gas reservoirs in the Fort Worth Basin, suggested that expulsion and diffusion had possibly drained the shale. In addition, gas contents measured on the M

...mary forces: (a) the inertia of the issuing water and associated turbulent diffusion; (b) friction between the effluent and the bed just seaward of the mouth; a ...ave and tide action favor this type of distributary pattern, and turbulent diffusion within the water mass becomes restricted to the horizontal. Bottom friction

.... F. Pratson, and M. S. Steckler, 1998, Clinoform development by advection-diffusion of suspended sediment; modeling and comparison to natural systems: Journal