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Petroleum Geology Acronyms


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ARC Phase Shift Resistivity 10 inch Spacing at 2 MHz, Environmentally Corrected (P10H)

This is the name of a log measured along a well bore (a well-log). You could find this abbreviation P10H in your log evaluation software or any (ASCII) log files provided by the logging company. The code stands for 'ARC Phase Shift Resistivity 10 inch Spacing at 2 MHz, Environmentally Corrected'. This log is very common in the industry.

Use this log to investigate the formation resistivity as measured by the phase shift of a high frequency electromagnetic wave (hundreds of KHz to several MHz, 1.1 GHz in the case of Schlumberger's EPT tool); these measurements are typically sharp (good vertical resolution) and have good dynamic range, but their depth of investigation is less than that of measurements based on attenuation.

In general this log thus reflects units of the electromagnetic propagation resistivity. This is a measure of the formation resistivity as measured by the attenuation or phase shift of a high frequency electromagnetic wave; the frequency range for these measurements is higher than that of induction measurements, typically hundreds of KHz to several MHz, and over 1 GHz in the case of the Schlumberger EPT tool.

This log usually has the unit 'Resistivity'. This is the property of a material which resists the flow of electrical current. The ratio of electric-field intensity to current density. The reciprocal of conductivity.

Data for this log is produced by a tool that uses a electromagnetic logging technique and can be used to investigate the resistivity of the formation. Similar logs are listed below:




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