Study and Verification of a Physical Simulation System for Formation Pressure Testing while Drilling

Figure 1

Testing principle of Drilling Formation Tester (DFT) (reproduced from [30]). (a) Seeking pattern (location by using gamma logging). (b) Testing pattern (setting packer to seal). (c) Testing pattern (pressure drop and buildup testing).

(a) Seeking pattern

(b) Testing pattern

(c) Testing pattern