Patent
Pore pressure formation evaluation while drilling
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TLDR
In this article, the traditional volumetric components of clay volume, mineral volume, total porosity, and water filled porosity are combined in a formation volusetric analysis to generate an indication of pore pressure which in turn is used in the drilling process as an aid in determining the lowest optimal drilling mud weight for most efficient drilling without incurring excessive risks of a blowout arising from an overpressured formation.Abstract:
Formation strength and other measurement while drilling parameters are combined in a formation volumetric analysis which produces not only the traditional volumetric components of clay volume, mineral volume, total porosity, and water filled porosity, but also, in shaley formations, an excess or overpressure porosity. The overpressure porosity is then utilized to generate an indication of pore pressure which in turn is used in the drilling process as an aid in determining the lowest optimal drilling mud weight for most efficient drilling without incurring excessive risks of a blowout arising from an overpressured formation.read more
Citations
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References
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Journal ArticleDOI
Estimation of Formation Pressures from Log-Derived Shale Properties(*)
C. E. Hottman,R. K. Johnson +1 more
TL;DR: In this paper, the authors determined the fluid pressure within the pore space of shales by using data obtained from both acoustic and resistivity logs, with an accuracy of approximately 0.04 psi per foot or about 400 psi at 10,000 feet.
Journal ArticleDOI
Application of Drilling Performance Data to Overpressure Detection
J.R. Jorden,O.J. Shirley +1 more
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