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→Methods for determining fluid contacts
|+ {{table number|1}}Method for determining fluid contacts within a well
|+ {{table number|1}}Method for determining fluid contacts within a well
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! Method
! Method || Description || Advantages || Limitations
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| Fluid sampling: [[Production testing|production tests]] [[Drill stem testing|drill stem tests]] [[Repeat formation tester|RFT]] tests
| rowspan = 3 | Fluid sampling: [[Production testing|production tests]] [[Drill stem testing|drill stem tests]] [[Repeat formation tester|RFT]] tests || rowspan = 3 | Directly determines fluid contacts by measuring recovered fluids || rowspan = 3 | Direct measure of fluid contact || Rarely closely spaced, so contacts must be interpolated
| Directly determines fluid contacts by measuring recovered fluids
| Direct measure of fluid contact
| Rarely closely spaced, so contacts must be interpolated
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| Problems with filtrate recovery on DST and RFT
| Problems with filtrate recovery on DST and RFT
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| [[Production problems#Water-gas coning|Coning]], [[degassing]], etc. may lead to anomalous recoveries
| [[Production problems#Water-gas coning|Coning]], [[degassing]], etc. may lead to anomalous recoveries
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