Changes

==Methods of defining flow units==

==Methods of defining flow units==

[[file:flow-units-for-reservoir-characterization_fig1.png|thumb|{{figure number|1}}Major types of geological and petrophysical data applied to flow unit zonation of a well. Here the flow units are delineated on the basis of permeability contrasts due to lithofacies changes and to the presence of a laterally continuous barrier to vertical permeability (flow unit 4). According to the definition of flow unit, it is permissible to define a flow unit that exhibits only weak flow or no flow through it. This property of flow units makes it possible to use a single numbering system for identifying both obvious flow units and probable permeability barriers that can be mapped at the same scale as reservoir quality flow units.]]

[[file:flow-units-for-reservoir-characterization_fig1.png|left|thumb|{{figure number|1}}Major types of geological and petrophysical data applied to flow unit zonation of a well. Here the flow units are delineated on the basis of permeability contrasts due to lithofacies changes and to the presence of a laterally continuous barrier to vertical permeability (flow unit 4). According to the definition of flow unit, it is permissible to define a flow unit that exhibits only weak flow or no flow through it. This property of flow units makes it possible to use a single numbering system for identifying both obvious flow units and probable permeability barriers that can be mapped at the same scale as reservoir quality flow units.]]

There is no universally applicable set of rules by which to define flow units. Dividing a reservoir into flow units requires an integration of stratigraphic, sedimentological, structural, petrographic, petrophysical, and field performance data. The process is summarized as follows ([[:file:flow-units-for-reservoir-characterization_fig1.png|Figure 1]]):

There is no universally applicable set of rules by which to define flow units. Dividing a reservoir into flow units requires an integration of stratigraphic, sedimentological, structural, petrographic, petrophysical, and field performance data. The process is summarized as follows ([[:file:flow-units-for-reservoir-characterization_fig1.png|Figure 1]]):