CONCEPTUAL MODEL TO ANALYSE THE EFFECT OF RETROGRADE FLUID COMPOSITION ON RETROGRADE RESERVOIR PRODUCTION PERFORMANCE AND SURFACE FACILITIES DESIGN

• Main Author: IRAWAN (NIM : 22208033), ANDI
• Format: Theses
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/21040
• Institution: Institut Teknologi Bandung

Retrograde gas reservoir is a unique reservoir with the occurence of gas condensation when it is produced. Condensation which starts at fluids dew point will affect the production of reservoir. Different composition means different dew point which indicates that production of reservoir was influenced by its original composition. Reservoir simulation was applied to analyse the effect of fluid original composition to reservoir performance and surface facilities required. Analysis was started by validating PVT data and reservoir model. Using those data, C7+ was varied between 1,5-6,5%-mole with constant OGIP of 14,9 TCF and was simulated using reservoir simulator. Simulation results were used as input for a surface facilities design using simulator to analyse their effect to surface facilitiesof gas and condensate production. Simulation results show that fluid composition have different condensate production at the starting of production and become similar after a period of time, <br /> <br /> <br /> while there is no difference at gas production. C7+ mole fraction of 1,5 up to 6,5% will produce condensates at 30-105 Mbbl/day at surface facilities depends on its composition. Heat required by reboiler also increases with increasing of C7+ fraction, but heat required for production of condensate with RVP ±5 psia decreases logarithmically from 56 Mbtu/bbl at 1,5%-mol of C7+ to 32 Mbtu/bbl at 6,5% of C7+.