Empirical and theoretical analysis of a modified isochronal test in a caspian region gas reservoir

A deliverability test performed in a gas well is one of the fundamental steps to determine flow potential wells reservoir surveillance. Dynamic models need robust AOF (Absolute Open Flow), productivity index, permeability for calibration, history matching, and predictions. In this study, Pliocene sandstone was validated using “Modified Isochronal Testing” method. This study aims mitigate efforts done estimate phenomenon wells. Hence, field development activities can be leveraged more efficient stage technically economically. AOF, Productivity Index (PI), tested interval were calculated. The validation with log core data increases confidence level work done. key performance indicator define at zero sand face pressure which measure ranking production values support determination number drilled design surface facilities. time obtained they analyzed by empirical theoretical methods. These two methods used analysis gave very close values; 10.15MMSCF/D (empirical) and10.67 MMSCF/D (theoretical), respectively. calculated as 3.42 md, line 3.70 md 3.40 md.