Method for the estimation of pore pressure within a subterranean

Details Method for the estimation of pore pressure within a subterranean Method for the estimation of pore pressure within a subterranean

1991-03-04

1992-05-26

Melius, Terry Lee

Boring or penetrating the earth

With signaling, indicating, testing or measuring

Indicating, testing or measuring a condition of the formation

175 65, 73151, E21B 4900

Patent

active

051158710

ABSTRACT:
A method for the estimation of pore pressure within a subterranean formation containing fluid during the drilling of a bore hole. The bore hole is drilled using a drill string consisting of a drill bit fitted to its lower end, and using drilling mud pumped from the surface through the drill string and finally evacuated. The method is characterized by, while the drill bit is level with the formation and while the drill string is being raised to the surface for a distance at least equalling the drill pipe length,

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Manohar La1, "Surge and Swab Modeling for Dynamic Pressures and Safe Trip Velocities", IADC/SPE 11412.

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