Pore pressure formation evaluation while drilling

Details Pore pressure formation evaluation while drilling Pore pressure formation evaluation while drilling

E - Fixed Constructions

21

B

255/1, 358/3, 32

E21B 47/06 (2006.01) E21B 21/08 (2006.01) E21B 49/00 (2006.01)

Patent

CA 1313863

PORE PRESSURE FORMATION EVALUATION WHILE DRILLING 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.

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