In the development planning studies of the Natuna gas project, a three-dimensional, two-phase reservoir simulation model of the Natuna gas field was used for evaluation of the gas reservoir and as a planning tool. A detailed sequence stratigraphic study of the gas field that incorporated seismic, well log and core data provided the basis for the geological model used in the reservoir simulation model. The objective of the development planning studies was to determine production well locations, production well drilling schedules, the total number of wells required, the timing for the installation of wellhead compression equipment and the gas production profile for the field as a function of time. The reservoir is estimated to be able to sustain a 2,400 million standard cubic feet per day (Mscf/d) methane production rate for 30 years or more.

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