Method for the estimation of pore pressure within a subterranean formation

Patent · Tue May 26 04:00:00 EDT 1992

OSTI ID:7045355

McCann, D P.J.; Kerbart, Y; Burgess, T M

This patent describes a method for estimating pore pressure in an underground formation being drilled with a drill string to form a borehole. It comprises monitoring the value of a first parameter to detect an influx of fluid from the formation into the borehole; monitoring the value of a second parameter indicative of the weight of the drill string while the drill bit is generally adjacent to the formation; monitoring any changes in the value of the second parameter while the drill string is being raised to the surface; correlating the first and second parameters and determining the change in value of the second parameter; and estimating the pore pressure of the formation from the determined change in value of the second parameter.

• Assignee: Schlumberger Technology Corp., Houston, TX (United States)
• Patent Number(s): A; US 5115871
• Application Number: PPN: US 7-664261
• OSTI ID: 7045355
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020200* -- Petroleum-- Reserves
Geology
& Exploration
440400 -- Well Logging Instrumentation
47 OTHER INSTRUMENTATION
CAPILLARY FLOW
DRILL PIPES
DRILLING
DRILLING EQUIPMENT
EQUIPMENT
FLUID FLOW
MWD SYSTEMS
OIL WELLS
PIPES
POROSITY
PRESSURE MEASUREMENT
RESERVOIR PRESSURE
WELL DRILLING
WELLS