Estimation of Pore Size Distribution and Permeability of Shaly Sands from Induced Polarization Time Spectra

摘要: The induced polarization decay curve contains much information, which can be decomposed to a multi-exponential component. singular value decomposition method makes it possible transform data into relaxation time spectra. appropriate number of arrangement points in inversion ranges from 32 64. spectrum used quantitatively estimate the pore size distribution shaly sands saturated with NaCl brine. Combining average IP constant porosity markedly improve accuracy determining permeability over total core measurements.