Reducing Uncertainty of Reserves Estimates Using Inversion of Time-Lapse Logging Data

Abstract

TX 75083-3836 U.S.A., fax 01-972-952-9435. AbstractThe estimation of hydrocarbon reserves heavily depends on the accuracy of resistivity data and the reliability of their interpretation. To optimize data information extraction from acquired modern array resistivity logs, integrated inversionbased interpretation techniques are required. However, the direct application of an inversion method may provide an incorrect equivalent solution, resulting in erroneous hydrocarbon estimates.To solve the equivalency problem, we have developed a new method that reconstructs the formation model in steps using inversion of time-lapse Logging-While-Drilling (LWD) and Wireline (WL) measurements. The main steps are: