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| Nuclear magnetic resonance log || Determines the nuclear magnetic response of the fluids in the rock || provides data that allows porosity and permeability to be estimated
| Nuclear magnetic resonance log || Determines the nuclear magnetic response of the fluids in the rock || provides data that allows porosity and permeability to be estimated
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| Dipmeter logs || Measures the electrical or sonic response of the rocks around the borehole || Used to calculate formation dip, pick out faults and other structures, and sometimes determine the sedimentary structure for paleocurrent analysis
| Dipmeter logs || Measures the electrical or sonic response of the rocks around the borehole || Used to calculate formation [[dip]], pick out faults and other structures, and sometimes determine the sedimentary structure for paleocurrent analysis
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| Borehole image logs || Measures a detailed profile of the electrical or sonic response of the rocks in the borehole || Gives an indication of hole conditions that can affect the reliability of the log responses
| Borehole image logs || Measures a detailed profile of the electrical or sonic response of the rocks in the borehole || Gives an indication of hole conditions that can affect the reliability of the log responses
==Borehole image logs==
==Borehole image logs==
Borehole image logs give a detailed electrical or sonic map of the borehole wall.<ref name=Luthi_1992>Luthi, S. M., 1992, [[Borehole imaging devices]] in D. Morton-Thompson and A. M. Woods, eds., [http://archives.datapages.com/data/alt-browse/aapg-special-volumes/me10.htm Development geology reference manual]: AAPG Methods in Exploration Series 10, p. 163–166.</ref> This enables geological information such as formation dip, sedimentary structures, faulting, and fracturing to be imaged. The dip and azimuths of these features are measured from the image logs. The logs are especially useful for the structural characterization of heavily faulted and fractured reservoirs. They also show thin beds in reservoir intervals where most conventional logs do not have the resolution to detect them.
Borehole image logs give a detailed electrical or sonic map of the borehole wall.<ref name=Luthi_1992>Luthi, S. M., 1992, [[Borehole imaging devices]] in D. Morton-Thompson and A. M. Woods, eds., [http://archives.datapages.com/data/alt-browse/aapg-special-volumes/me10.htm Development geology reference manual]: AAPG Methods in Exploration Series 10, p. 163–166.</ref> This enables geological information such as formation dip, sedimentary structures, faulting, and fracturing to be imaged. The dip and [[azimuth]]s of these features are measured from the image logs. The logs are especially useful for the structural characterization of heavily faulted and fractured reservoirs. They also show thin beds in reservoir intervals where most conventional logs do not have the resolution to detect them.
==Formation tester logs==
==Formation tester logs==