Changes

* Test the validity of flow units established by consideration of production logs (see [[Production engineering methods]]), flow tests of small intervals, oil and water geochemistry (see [[Laboratory methods]]), repeat formation tester (RFT) surveys (see [[Wireline methods]]), injectivity logs, tracer surveys, and any available data on patterns of production through time. Modify the flow unit definitions as needed to accommodate the physical measurements of flow, if a rationale can be found for the differences.

* Test the validity of flow units established by consideration of production logs (see [[Production engineering methods]]), flow tests of small intervals, oil and water geochemistry (see [[Laboratory methods]]), repeat formation tester (RFT) surveys (see [[Wireline methods]]), injectivity logs, tracer surveys, and any available data on patterns of production through time. Modify the flow unit definitions as needed to accommodate the physical measurements of flow, if a rationale can be found for the differences.

[[file:flow-units-for-reservoir-characterization_fig2.png|thumb|{{figure number|2}}Some examples of lithofacies and flow unit subdivisions of clastic and carbonate reservoirs. (a) Lithofacies and (b) flow unit subdivision of the Shannon Sandstone body in the Hartzog Draw field, Powder River basin, Wyoming. (Modified from <ref name=pt06r51 />.) (c) Lithofacies and (d) reservoir facies (flow unit) subdivision of the Rainbow Lake reef reservoir (“A” Pool), Alberta, Canada. (Modified from <ref name=Langston_and_Chin_1968 />.)]]

[[file:flow-units-for-reservoir-characterization_fig2.png|thumb|{{figure number|2}}Some examples of lithofacies and flow unit subdivisions of clastic and carbonate reservoirs. (a) Lithofacies and (b) flow unit subdivision of the Shannon Sandstone body in the Hartzog Draw field, Powder River basin, Wyoming. (Modified from Hearn et al.<ref name=pt06r51 />) (c) Lithofacies and (d) reservoir facies (flow unit) subdivision of the Rainbow Lake reef reservoir (“A” Pool), Alberta, Canada. (Modified from Langston and Chin.<ref name=Langston_and_Chin_1968 />)]]

The distribution of petrophysical properties such as porosity and permeability can be mapped within flow units using well control only or by applying geostatistical procedures to create stochastic realizations of these distributions “conditioned” on the well data (see [[Geological methods]]). Geostatistical techniques that have a strong stochastic component are consistent with, and complementary to, the flow unit concept, which is itself mostly deterministic.

The distribution of petrophysical properties such as porosity and permeability can be mapped within flow units using well control only or by applying geostatistical procedures to create stochastic realizations of these distributions “conditioned” on the well data (see [[Geological methods]]). Geostatistical techniques that have a strong stochastic component are consistent with, and complementary to, the flow unit concept, which is itself mostly deterministic.