The theoretical analysis of pressure response associated with Wireline Formation Test (WFT) data was first introduced in 1962 by Moran and Finklea1  but was generally not widely used due to its radius of investigation being very small comparable to that of conventional drill stem testing, and due to gauge resolution limit2 . Analytical techniques using pressure derivative curves introduced by Bourdet et. al. (1983)3  have subsequently had a significant impact on the increased use of pressure transient analysis (PTA) techniques. This paper aims to illustrate the wide range of information that can be obtained from WFT data using an advanced well test analysis technique to analyze the WFT pressure response, and is illustrated using field examples from the Asia Pacific Region. A single well model numerical simulation for a wireline formation tester deploying a single probe is used to verify the PTA results presented. An analytical solution in well test analysis software is also used to generate pressure transient response to confirm results from actual field examples.

Keywords:
regime, pressure response, probe, pressure derivative, log-log plot, layer boundary, permeability, cylindrical flow, upstream oil & gas, reservoir
Subjects:
Reservoir Fluid Dynamics, Formation Evaluation & Management, Flow in porous media, Pressure transient analysis, Drillstem/well testing, Formation test analysis (e.g., wireline, LWD)
Copyright 2004, Society of Petroleum Engineers
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