logInversion is a well log inversion tool designed to estimate reservoir parameters from well logs response. This tool can process both sand-shale and carbonate formation using rock component model or mineral component model. The reservoir parameters, such as porosity, volume of shale (illite) and water saturation can be globally optimized from all available log response equations. There are seven resistivity response equations for water saturation. It is a No.1 interactive and real-time log inversion product and the inversion results can be traced automatically while processing. Both sections and zones can be predefined according to stratigraphic tops and lithology. All the parameters can be controlled and updated from Human Interface section-by-section and zone-by-zone if needed.