Formation volumetric evaluation while drilling

Details Formation volumetric evaluation while drilling Formation volumetric evaluation while drilling

1989-02-27

1990-08-21

Chapman, John

Measuring and testing

Borehole or drilling

Downhole test

166250, E21B 4900

Patent

active

049495755

ABSTRACT:
Formation Strength and other measurement while drilling parameters are combined to produce a formation volumetric analysis which may including the traditional volumetric components of clay volume, sand volume, total porosity, and water filled porosity. In shaley formations, the volumetric analysis may also include an excess or overpressure porosity. Formation Strength may be derived from measurements of torque and weight on bit and be corrected for such effects as bit dullness, mud weight and hydrostatic pressure balance.

REFERENCES:
patent: 4064749 (1977-12-01), Pittman et al.
patent: 4599904 (1986-07-01), Fontenot

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