Changes

==Evaluation==

==Evaluation==

[[file:evaluating-stratigraphically-complex-fields_fig1.png|thumb|{{figure number|1}}Example of electrofacies map showing distribution of SP log patterns. (From <ref name=pt06r35>Galloway, W. E., Cheng, E. S. S., 1985, Reservoir facies architecture in a microtidal barrier system—Frio Formation, Texas Gulf Coast: The University of Texas Bureau of Economic Geology, Report of Investigations, v. 144, 36 p.</ref>.)]]

[[file:evaluating-stratigraphically-complex-fields_fig1.png|thumb|{{figure number|1}}Example of electrofacies map showing distribution of SP log patterns. (From Galloway and Cheng.<ref name=pt06r35>Galloway, W. E., Cheng, E. S. S., 1985, Reservoir facies architecture in a microtidal barrier system—Frio Formation, Texas Gulf Coast: The University of Texas Bureau of Economic Geology, Report of Investigations, v. 144, 36 p.</ref>)]]

Recognition and three-dimensional characterization of reservoir heterogeneity in a stratigraphically complex field requires a well-by-well analysis of the following:

Recognition and three-dimensional characterization of reservoir heterogeneity in a stratigraphically complex field requires a well-by-well analysis of the following:

* Understand the basic regional and local geological setting.

* Understand the basic regional and local geological setting.

* Describe lithofacies and interpreted depositional environment(s) (see “Lithofacies and Environmental Analysis of Clastic Depositional Systems”).

* Describe lithofacies and interpreted depositional environment(s) (see [[Lithofacies and environmental analysis of clastic depositional systems]]).

* Determine the relationship between lithofacies/depositional environment and reservoir distribution and quality.

* Determine the relationship between lithofacies/depositional environment and reservoir distribution and quality.

* Determine reservoir distribution.

* Determine reservoir distribution.