What Is Porosity Log
The “Porosity” Logs. There Are Three Types of Logging Tools That Are Used to Estimate the Amount of Pore Space in a Rock: the Neutron, Density, and Acoustic...
The “Porosity” logs. There are three types of logging tools that are used to estimate the amount of pore space in a rock: the neutron, density, and acoustic velocity (or sonic) tool. … So, the log is mainly a measure of hydrogen concentration (mostly contained by the pore fluids of the formation).
How do you read porosity logs?
To obtain porosity, read the value directly from the log. If the log is recorded in limestone units and the formation you wish to evaluate is sandstone or dolomite, then correct the log value by using the appropriate chart in a log interpretation chartbook.
What do neutron porosity logs actually measure and why?
The neutron log is sensitive mainly to the amount of hydrogen atoms in a formation. Its main use is in the determination of the porosity of a formation. … The resulting low energy neutrons or gamma rays can be detected, and their count rate is related to the amount of hydrogen atoms in the formation.
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