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| Saturation can be related to petro-physical properties || Usually not continuously cored, so saturation profile is not as complete
| Saturation can be related to petro-physical properties || Usually not continuously cored, so saturation profile is not as complete
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| Pressure profiles: [[Repeat formation tester|RFT]] tests
| rowspan = 3 | Pressure profiles: [[Repeat formation tester|RFT]] tests || rowspan = 3 | Estimates [[free water surface]] from inflections in pressure versus depth curve || rowspan = 3 | Little affected by lithology or [[Production problems#Water-gas coning|coning]]
| Estimates [[free water surface]] from inflections in pressure versus depth curve
| Little affected by lithology or [[Production problems#Water-gas coning|coning]]
| Imprecise; data usually require correction
| Imprecise; data usually require correction
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| Only useful for thick hydrocarbon columns
| Only useful for thick hydrocarbon columns
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| Most reliable for gas contacts Requires many pressure measurements for profile Requires accurate pressures
| Most reliable for gas contacts Requires many pressure measurements for profile Requires accurate pressures
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