A METHOD FOR OBTAINING LEAK-OFF TEST AND FORMATION INTEGRITY TEST PROFILES FROM LIMITED DOWNHOLE PRESSURE MEASUREMENTS

摘要

The present invention presents a method that effectively restores the realtime advantage of annular pressure while drilling (APWD) measurements taken during certain drilling operations that require the mud circulation pumps to be turned off (a "pumps-off" condition). APWD data, such as pressure measurements, is obtained from instruments and related electronics within the BHA. APWD data can be measured, stored and even processed in the BHA during a pumps-off condition for subsequent processing or communication of a reduced amount of data to the driller at the surface.