New Wireline Formation Tester Techniques and Applications


Rob Badry, Elton Head, Charles Morris, Ian Traboulay,

SPWLA 34th Annual Logging Symposium, June 13-16, 1993



Wireline Formation Testers are used to obtain formation fluid samples and to produce profiles of high precision pressure measurements versus depth. In addition, pressure transients are interpreted to estimate permeability in the region near the probe. Test attempts must confront a number of problems that previously have restricted the practical operating domain to a small fraction of candidate wells. Well- known fluid sampling problems include filtrate invasion, difficulty establishing and maintaining a probe seal, and pressure drawdown below bubblepoint.