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M91FG24.JPG|{{figure number|1}}Wetting and nonwetting relationships between fluids and rocks have a major effect on the static and dynamic behavior of hydrocarbons in reservoirs.

M91FG24.JPG|{{figure number|1}}Wetting and nonwetting relationships between fluids and rocks have a major effect on the static and dynamic behavior of hydrocarbons in reservoirs.

M91FG25.JPG|{{figure number|2}}In a water-wet reservoir, water wets the surface of the grains, and hydrocarbons occupy the central parts of the pore space. Moving water will displace the oil from the center of the pores (from Clark et al).<ref>Clark, N. J., H. M. Shearin, W. P. Scultz, K. Garms, and J. L. Moore, 1958, Miscible drive—Its theory and application: Journal of Petroleum Technology, v. 10, SPE Paper 1036-G, p. 11–20.</ref> Reprinted with permission from the Society of Petroleum Engineers.

M91FG25.JPG|{{figure number|2}}In a water-wet reservoir, water wets the surface of the grains, and hydrocarbons occupy the central parts of the pore space. Moving water will displace the oil from the center of the pores (from Clark et al).<ref>Clark, N. J., H. M. Shearin, W. P. Scultz, K. Garms, and J. L. Moore, 1958, Miscible drive—Its theory and application: Journal of Petroleum Technology, v. 10, SPE Paper 1036-G, p. 11–20.</ref> Reprinted with permission from SPE.

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