Interval inversion of multiwell logging data for estimating laterally varying petrophysical parameters and formation boundaries

Abstract The present paper introduces a Legendre polynomials based interval inversion method for processing multi-borehole logging data. allows the determination of lateral changes layer-thicknesses together with vertical and variations petrophysical parameters along 2D cross-section several boreholes. is assessed using noisy synthetic measurements model made two-layers structure related to hydrocarbon bearing formations. numerical experiments aided investigate stability convergence procedure. To ensure accuracy reliability results, misfit data distance are tested, beside calculation estimation errors correlation coefficients. A large amount input relative number unknowns results in high overdetermined ratio, consequently more precise estimates obtained stable convergent procedure than conventional local (1D) schemes. feasibility shown by analysing in-situ well acquired four wells situated an Egyptian field.