Gas-Condensate Reservoir Productivity: A Critical Analysis of Different Reservoir Dips

Abstract Gas-Condensate reservoir fluids and its production are important in this era of rising demand for cleaner fossil fuel, which gas is of high priority. Understanding gas-condensate reservoir nature and structure will aid in predicting the condensate saturation and productivity of gas-condensate reservoir. This work evaluates the impact of reservoir dips on condensate saturation, daily gas produced, cumulative gas production, and cumulative condensate production. Computer Modelling Group (CMG) software, Builder (Preprocessor) was used to create a gas-condensate reservoir input file, WinProp (PVT software) used for fluid characterization, and GEM used for model creation and validation. A base case (horizontal) and variant dips (2°,3°,4°,5°, and 6°) reservoir model of 27 grid cells (27 27 1) with a square area of 100,000ft^2 was created. The model was initialized at a pressure of 7000psi and temperature of 256°F and analyzed. Results show that condensate saturation increased by 12.8147% for the 2-degree dip from the base (horizontal) case and subsequently increased with the remaining dips. Field gas production rate increased from 50.251MMscf/day to 63.469MMscf/day for the 2-degree dip and remains constant for the remaining dips. The cumulative gas produced increased from 203.046MMscf to 227.01134MMscf for the 2-degree dip but showed minimal increase for the remaining dips. The condensate recovery factor increases from 18.502% to 18.567% for the 2-degree dips and declines gradually for the remaining reservoir dips. Also, the cumulative condensate production increased from 23199.013bbl to 26364.9843bbl for the 2-degree dip. The model has shown an increase in gas condensate recovery.