Reservoir characterization by petrophysical analysis and core data validation, a case study of the "x" field prospect zone

Petrophysical analysis has been performed by evaluating log data that have been validated with core data using Geoframe 4.2 software. Using secondary log and core data which are located at depth of 1414 - 3820 ft, the research purpose is identifying reservoir characteristics of "X" field prospect zone. Sand A-Zone has permeability of 9.38% error curve and porosity curve error of 0.78%. In Sand B Zone permeability error of 52.32% curve and porosity error of 7.13%. In Sand C Zone permeability error of 198.8% curve and porosity error of 2.85%. In Sand D Zone permeability error of 61.54% curve and porosity error of 29.87%. In Sand E Zone permeability error of 54.73% curve and porosity error of 4.52%. There is no good correlation and error values that tend to be large because the lithology in Sand B and Sand C Zone has a tight range of lithology, so the reading of logging tool gives a fairly high error, especially in permeability data which still shows a decrease in error value after validated with core data. Quantitative analysis obtained by petrophysical parameter range from six zones porosity of 26 %, permeability of 2661 mD, and water saturation of 0.37 frac.