What is it about?
The conversion method for calculating PPG from the actual measurements in PSI is usually computationally distorted,especially in a geopressured system. PP in permeable beds shows a positive gradient slope on the P-D plot but it generally has a negative slope on the PPG-D plot. This has been attributed incorrectly to several geopressure phenomena, such as regression, centroid, etc. This article demonstrates how a new geologically based model will help correct this issue.
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Why is it important?
This method of conversion from PSI to PPG MWE helps to correctly calibrate the PPP models. More over it alerts the drillers for kicks or expected lost circulation. It is a great safety tool during drilling.
Perspectives
This method was created due to the fact that subsurface pressure usually increases with depth not the vise versa.
Dr Selim S. Shaker
Read the Original
This page is a summary of: The controversial pore pressure conversion factor: PSI to PPG MWE, The Leading Edge, December 2003, Society of Exploration Geophysicists,
DOI: 10.1190/1.1641374.
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