2D inversion of borehole logging data for simultaneous determination of rock interfaces and petrophysical parameters

Dobróka, M. and Szabó, P. and Cardarelli, E. and Vass, P. (2009) 2D inversion of borehole logging data for simultaneous determination of rock interfaces and petrophysical parameters. Acta Geodaetica et Geophysica Hungarica, 44 (4). pp. 459-479. ISSN 1217-8977

Text ageod.44.2009.4.7.pdf Restricted to Repository staff only Download (580kB)

Abstract

In the paper a 2D joint inversion method is presented, which is applicable for the simultaneous determination of layer thickness variation and petrophysical parameters by processing well-logging data acquired in several boreholes along the profile. The so-called interval inversion method is tested on noisy synthetic data sets generated on hydrocarbon-bearing reservoir models. Numerical experiments are performed to study the convergence and stability of the inversion procedure. Data and model misfit, function distance related to layer thickness fitting are measured as well as estimation errors and correlation coefficients are computed to check the accuracy and reliability of inversion results. It is shown that the actual inversion procedure is stable and highly accurate, which arises from the great over-determination feature of the inverse problem. Even a case study is attached to the paper in which interval inversion procedure is applied for processing of multi-borehole logging data acquired in Hungarian hydrocarbon exploratory wells in order to determine petrophysical parameters and lateral changes of layer thicknesses.

Actions (login required)

Edit Item