Pressure-pressure convolution analysis using wireline formation tester data

When flow rate data are not reliable, the need for flow rate to estimate permeability from wireline formation tester multiprobe and packer/probe pressure data sets can be eliminated by use of pressure-pressure (P-P) convolution. The P-P convolution uses two pressure data sets recorded at different spatial locations, thus enabling parameter estimation without flow rate. This paper compares multiprobe and packer/probe pressure transient tests by considering various P-P convolution options.