Changes

==Purpose and procedure==

==Purpose and procedure==

The purpose of a facies map is to reconstruct [[paleogeography]], from which we can predict [[reservoir]], [[seal]], and [[source rock]] distribution. Facies maps are made at an [http://en.wiktionary.org/wiki/isochronous isochronous] surface or within a coeval interval.<ref name=ch04r94>Tearpock, D., J., Bischke, R., E., 1991, Applied Subsurface Geologic Mapping: Prentice-Hall, 648 p.</ref><ref name=ch04r107>Visher, G., S., 1984, Exploration Stratigraphy: Tulsa, PennWell Books, 334 p.</ref> We map reservoir system thickness (1) to compare the distribution of reservoir-system thickness and field location and (2) to identify or predict locations with thick reservoirs and trapping conditions that are undrilled. A procedure for mapping facies is outlined in the table below.

The purpose of a facies map is to reconstruct [[paleogeography]], from which we can predict [[reservoir]], [[seal]], and [[source rock]] distribution. Facies maps are made at an [http://en.wiktionary.org/wiki/isochronous isochronous] surface or within a coeval interval.<ref name=ch04r94>Tearpock, D., J., Bischke, R., E., 1991, Applied Subsurface Geologic Mapping: Prentice-Hall, 648 p.</ref><ref name=ch04r107>Visher, G., S., 1984, Exploration Stratigraphy: Tulsa, PennWell Books, 334 p.</ref> We map [[reservoir system]] thickness (1) to compare the distribution of reservoir-system thickness and field location and (2) to identify or predict locations with thick reservoirs and trapping conditions that are undrilled. A procedure for mapping facies is outlined in the table below.

{| class = "wikitable"

{| class = "wikitable"