Formation testing apparatus and method for smooth draw down

Details Formation testing apparatus and method for smooth draw down Formation testing apparatus and method for smooth draw down

2004-02-19

2008-07-08

Williams, Hezron E. (Department: 2856)

Measuring and testing

Borehole or drilling

Fluid flow measuring or fluid analysis

Reexamination Certificate

active

07395703

ABSTRACT:
A method and apparatus for of determining a formation parameter of interest. The method includes placing a tool into communication with the formation to test the formation and drawing down a test volume at an increasing draw rate during a first draw period and decreasing the draw rate during a second draw period to create a smooth draw down cycle. The draw down can be step-wise or continuous. The formation parameter is determined using formation rate analyis and characteristics determined during the draw down cycle.

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