Pressure Transient Analysis of a Gas-Condensate WellbyAnalytical and Numerical Models (A Case Study in South of Iran)

Abstract

In gas-condensate reservoirs when the pressure falls below the dewpoint pressure, liquid drop out and condensate accumulates near the well. This condensate buildup decreases the relative permeability to gas, thereby causing a decline in the well productivity. In this study a set of pressure transient data obtained from an actual production well in a gas-condensate reservoir in Iran has been used. The objectives being analytical interpretation of the data, and verifying the results with compositional simulation results. At first the transient pressure test has been analyzed using a standard well test package. The test is then analyzed using a commercial compositional simulator. The results of the compositional simulation show that capillary number effects should be included in order for history match. The challenge is then to find the capillary number correlation parameters.