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Morrow lithofacies and pore types: Sorrento field (view source)
Revision as of 15:30, 13 February 2014
, 15:30, 13 February 2014→Reservoir porosity and permeability
Morrow sandstones in Sorrento field have a wide range in porosity and [[permeability]]. Maximum observed porosity (Φ) is 20-22%, but more typical values are 10-15%. Air permeabilities (K<sub>a</sub>) are as great as 1-2 darcies but more commonly are 200-500 md.
Morrow sandstones in Sorrento field have a wide range in porosity and [[permeability]]. Maximum observed porosity (Φ) is 20-22%, but more typical values are 10-15%. Air permeabilities (K<sub>a</sub>) are as great as 1-2 darcies but more commonly are 200-500 md.
[[:file:predicting-reservoir-system-quality-and-performance_fig9-87.png|Figure 1]] is a K<sub>a</sub>/Φ crossplot for well 11 (see Figure 9-87). Dots and polygons represent measured K<sub>a</sub>/Φ values. Curves are the graphical solution of Winland's r<sub>35</sub> equation<ref name=ch09r46>Pittman, E., D., 1992, Relationship of porosity to permeability to various parameters derived from mercury injection–capillary pressure curves for sandstone: AAPG Bulletin, vol. 76, no. 2, p. 191–198.</ref> and represent equal r<sub>35</sub> values (port size).
[[:file:predicting-reservoir-system-quality-and-performance_fig9-87.png|Figure 1]] is a K<sub>a</sub>/Φ crossplot for well 11. Dots and polygons represent measured K<sub>a</sub>/Φ values. Curves are the graphical solution of Winland's r<sub>35</sub> equation<ref name=ch09r46>Pittman, E., D., 1992, [http://archives.datapages.com/data/bulletns/1992-93/data/pg/0076/0002/0000/0191.htm Relationship of porosity to permeability to various parameters derived from mercury injection–capillary pressure curves for sandstone]: AAPG Bulletin, vol. 76, no. 2, p. 191–198.</ref> and represent equal r<sub>35</sub> values (port size).
The crossplot shows a large variation in port size for the samples from well 11. Areas between dashed lines group points into beds with similar port size, or flow units.
The crossplot shows a large variation in port size for the samples from well 11. Areas between dashed lines group points into beds with similar port size, or flow units.