Method for determining pore pressure and horizontal effective st

Details Method for determining pore pressure and horizontal effective st Method for determining pore pressure and horizontal effective st

1986-05-28

1991-01-01

Williams, Hezron E.

Measuring and testing

Borehole or drilling

Downhole test

166250, 175 50, E21B 4900

Patent

active

049810375

ABSTRACT:
The porosity-effective stress relationship, which is a fuction of lithology, is used to calculate total overburden stress, vertical effective stress, horizontal effective stress and pore pressure using well log data. The log data can be either real time data derived from measurement-while-drilling equipment or open hole wireline logging equipment.

REFERENCES:
patent: 3907034 (1935-09-01), Suman, Jr.
patent: 4635719 (1987-01-01), Zoback et al.
"Petrophysical-Mechanical Math Model for Real-Time Wellsite Pore Pressure/Fracture Gradient Prediction" by Philip Holbrook and Michael Hauck, SPE 16666, Copyright 1987 for presentation at 62nd Annual Technical Conference and Exhibition of the Society of Petroleum Engineers held in Dallas, TX on Sep. 27-30, 1987.

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