Q1: A gas reservoir is 4300 acres in area, 120 ft thick, at 149 F temperature, with a water saturation of 25%, and contains gas of 0.82 gravity. The pressure at the reservoir's perimeter is 2850 psia. A well, 6* in diameter, is completed in the middle of the reservoir and is kept at a pressure of 1200 psia. What is the production rate from this reservoir in SCF/day? The steady-state production rate (in SCF/day) of a well from a gas reservoir is given by: 703 25 kch P.2 - P 9g.se TZ In fe rw where kg is the effective permeability to gas (darcies) and Z and are the average reservoir gas z-factor and viscosity, respectively. These properties are to be estimated at the average pressure in the reservoir. The gas effective permeability curve is shown below. n: + CO 8 5 Effective Permeability to Gas (mD) 3 0 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 where ke is the effective permeability to gas (darcies) and Z and are the average reservoir gas z-factor and viscosity, respectively. These properties are to be estimated at the average pressure in the reservoir. The gas effective permeability curve is shown below. C 9 9 + 8 6 5 Effective Permeability to Gas (mD) 0 0.2 0.3 0.4 0.7 0.8 0.9 0.5 0.6 Water Saturation Q2: In Ql, what is the rate of gas in CF/day arriving at the well