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Petroleum Geology Acronyms


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High Resolution Density Porosity (HDPH)

This is a log of measurements along a well bore (a well-log). The code HDPH is a unique identifier to recognize this particular log and can be found in any (ASCII) log files provided by the logging company. High Resolution Density Porosity is the offical name for this log. This log is very common in the industry.

This log can be used to evaluate the porosity derived from a formation density measurement. In general this log therefore displays units of the apparent porosity. In other words, the initial estimate of porosity, normally from logs, not corrected for the (often large) effects of clays, gas, etc. Such estimates should only be used for qualitative interpretation of clean, gas-free intervals. In general this is a measurement of the volume fraction. This can be explained as being the ratio of the volumes occupied by two components, or by one component to the total volume of the system.

This log usually has the unit 'Porosity'. This is the pore volume per unit gross volume. Porosity is determined from measurements on cores or interpreted from logs.

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




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