| Farm in |
When a company acquires an interest in a block by taking over all or part of the financial commitment for drilling an exploration well. |
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| FDD |
Differential Pressure principle Fluid Density Tool. |
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| FDR |
Radioactive signal attenuation principle Fluid Density Tool. |
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| Field |
A geographical area under which an oil or gas reservoir lies. |
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| Finger |
One of a number of sensors which form part of a caliper tool, for measuring casing diameter and condition across wellbore depth. |
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| Fishing |
Retrieving objects from the borehole, such as a broken drillstring, or tools. |
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| Flowmeter |
Device to measure the flowrate of the well, usually by determination of fluid velocity. |
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| Formation |
A general term applied in the well-logging industry to the external environment of the drilled wellbore. |
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| Formation pressure |
The pressure at the bottom of a well when it is shut in at the wellhead. |
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| Formation water |
Salt water underlying gas and oil in the formation. |
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| Fracturing |
A method of breaking down a formation by pumping fluid at very high pressures. The objective is to increase production rates from a reservoir. |
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