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| + | {{merge|Water saturation}} |
| + | |
| {{publication | | {{publication |
| | image = exploring-for-oil-and-gas-traps.png | | | image = exploring-for-oil-and-gas-traps.png |
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| | part = Predicting the occurrence of oil and gas traps | | | part = Predicting the occurrence of oil and gas traps |
| | chapter = Predicting reservoir system quality and performance | | | chapter = Predicting reservoir system quality and performance |
− | | frompg = 9-1 | + | | frompg = 9-45 |
− | | topg = 9-156 | + | | topg = 9-45 |
| | author = Dan J. Hartmann, Edward A. Beaumont | | | author = Dan J. Hartmann, Edward A. Beaumont |
| | link = http://archives.datapages.com/data/specpubs/beaumont/ch09/ch09.htm | | | link = http://archives.datapages.com/data/specpubs/beaumont/ch09/ch09.htm |
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| | isbn = 0-89181-602-X | | | isbn = 0-89181-602-X |
| }} | | }} |
− | Water saturation can be measured directly from a sealed core, which is an expensive method, or it can be calculated from the Archie equation, which is less expensive. S<sub>w</sub> can also be estimated using a graphical representation of the Archie equation known as the Pickett crossplot. This subsection discusses how to calculate S<sub>w</sub> using the Archie equation, how to determine values for variables of the Archie equation, and how to make a Pickett crossplot. | + | Water saturation (S<sub>w</sub>) can be measured directly from a sealed core, which is an expensive method, or it can be calculated from the [[Archie equation]],<ref name=Archie_1942>Archie, G. E., 1942, The electrical resistivity log as an aid in determining some reservoir characteristics: Petroleum Transactions of AIME 146: 54–62.</ref> which is less expensive. S<sub>w</sub> can also be estimated using a graphical representation of the Archie equation known as the [[Pickett plot construction|Pickett plot]].<ref name=ch09r45>Pickett, G. R., 1973, Pattern recognition as a means of formation evaluation: The Log Analyst, vol. 14, no. 4, p. 3–11.</ref> |
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| ==See also== | | ==See also== |
− | * [[Calculating s<sub>w</sub> from the Archie equation]] | + | * [[Archie equation]] |
− | * [[Determining r<sub>t</sub>]] | + | * [[Determining Rt]] |
− | * [[Determining [[porosity]] from density–neutron logs]] | + | * [[Determining porosity from density-neutron logs]] |
− | * [[Calculating r<sub>w</sub> from SP logs]] | + | * [[Calculating Rw from SP logs]] |
− | * [[Constructing a Pickett plot]] | + | * [[Pickett plot construction]] |
| + | |
| + | ==References== |
| + | {{reflist}} |
| | | |
| ==External links== | | ==External links== |
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| [[Category:Predicting the occurrence of oil and gas traps]] | | [[Category:Predicting the occurrence of oil and gas traps]] |
| [[Category:Predicting reservoir system quality and performance]] | | [[Category:Predicting reservoir system quality and performance]] |
| + | [[Category:Treatise Handbook 3]] |