| Warrior |
Acquisition and presentation software selected by Sondex, released as MIDAS. |
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| Water Cut |
The volume fraction of water in the total volume of liquid produced from a well. |
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| Water Injection |
A Secondary Recovery technique whereby water is injected into a well adjacent to the production well, forcing oil across to the production well. |
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| Well Log |
A record of geological formation penetrated during drilling, including technical details of the operation. |
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| Well Trajectory |
A set of data describing the depth, deviation and direction of a well. |
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| WEST |
Well Entry Simulation System: Downhole Tractor simulation software. |
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| Wildcat well |
A well drilled in an unproven area. Also known as a "exploration well". |
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| Winch |
A surface for the deployment of a logging cable. |
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| Wireline |
In the USA, a slickline. Outside the USA, an armoured, electrically conductive logging cable for SRO logging. |
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| Workover |
Remedial work to the equipment within a well, the well pipework, or relating to attempts to increase the rate of flow. |
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