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Environments and tool options:
Since there are many different drilling environments and logging options, a brief discussion on the merits of different tools in different environments is warranted. The two basic mud environments have different tools that are suited best to them: Water Based: In conductive mud, the greatest variety of options is available to the logger. Electrical conductivity is easily measured in the borehole wall as the mud environment does not hinder the flow of electricity from the tool to the rock and back to the tool's receptors. In addition to dipmeter and electrical borehole images, acoustic borehole images can be generated for feature resolution in conductive muds.
Oil Based:
Contemporary oil-based image tools have greatly improved options for imaging in invert muds. While
acoustic image tools and scratcher based dipmeter tools
are still available, four and six-arm oil-based image tools are the preferred option for bedding measurement.
Acoustic image tools are reliable for fracture detection and help to support the oil-based image tool for high-angle bedding.
Move your mouse over the highlighted words to view an example of each & click on them for a more detailed explanation.
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