A. GHANE - NATIONAL IRANIAN GAS EXPORT COMPANY, TEHRAN UNIVERSITY OF TECHNOLOGY, UNDER SUPERVISION OF PARS OIL AND GAS COMPANY (POGC),

The exact determination of the precise reservoir fluid properties (PVT) in addition to the Positive role in evaluation of correct performance and volume of fluid in place calculation for any reservoir has got a doubly important deciding value for gas condensate reservoirs. This is particularly important because of the liquid drop out phenomenon due to reservoir pressure drop as a result of fluid production. These liquid drop outs are immobile and irreducible due to the low degree of saturation and are considered as losses. Among the other factors which is important in gas condensate reservoirs and is strongly dependent on fluid properties, is gas recycling to prevent condensate losses. Gas recycling stops or reduces the reservoir pressure drop which increases the condensate recovery. Therefore without a thorough knowledge of reservoir PVT fluid properties, it will not be possible to assess the degree of liquid drop out or to design recycling projects. Presently in many countries of the world specially Iran, giant gas condensate reservoirs with average to high liquid-gas ratios exist, which primarily due to natural depletion, have had large liquid drop outs and losses (sometimes up to 30 mstb/d). Other very important components for onshore facilities are CO2 and specially H2S through correct estimation of these components have direct effect on acid gas removal unit and sulfur recovery of the plant. South Pars is the biggest gas reservoir in the world and good component determination in different location of reservoir can be very useful for development plan.

Composition, South Pars, Gas Condensate, PVT