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M91Ch11FG73.JPG|{{figure number|2}}Lithofacies map for the upper Piper Sand interval of the Scott field, UK North Sea (from Guscott et al., 2003). Reprinted with permission from the Geological Society. From Shepherd, M., 2009, Lithofacies maps, in M. Shepherd, Oil field production geology: AAPG Memoir 91, p. 93-98.

M91Ch11FG73.JPG|{{figure number|2}}Lithofacies map for the upper Piper Sand interval of the Scott field, UK North Sea (from Guscott et al., 2003). Reprinted with permission from the Geological Society. From Shepherd, M., 2009, Lithofacies maps, in M. Shepherd, Oil field production geology: AAPG Memoir 91, p. 93-98.

M91FG102.JPG|{{figure number|3}}

M91FG102.JPG|{{figure number|3}}Vertical flow barriers can control the drainage patterns in a reservoir. The degree to which individual barriers are effective across the reservoir can be characterized by vertical flow barrier maps.

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