R Reservoir HH is a gas reservoir located in the Jabung region, Jambi.Reservoir HH has been in production since July 2015 until now, with a totalproduction of 1996.92 MMscf. HH Reservoir is calculated the initial gas content inplace as well as the remaining gas that can be produced to determine the length oftime the HH reservoir is able to produce. Based on research, HH reservoirs areincluded in the dry gas reservoir reservoir with the thrust in the form of a depletiondrive. Calculation of the initial contents of the HH reservoir gas using the materialbalance method P / Z vs GP with integrated MBAL software obtained the initial gasfill value of 4156.84 MMscf. Based on the abandonment pressure value of 130 psiaHH reservoir has a maximum initial gas content that can be produced or estimatedultimate recovery of 3942.42 MMscf, with a recovery factor value of 94.84% andthe remaining gas that can be produced by the HH reservoir in July 2018 based onthe amount the initial contents of the gas in place (GIIP) with MBAL software thatis equal to 1945.5 MMscf or equivalent to 1.9 Bscf. With a daily HH reservoirproduction target of 1 MMscf, based on the calculation of a reservoir HH time frameit is capable of producing until February 14, 2004.