Question 3) A dry gas reservoir with consistent thickness measuring 64 feet, a porosity of 19%,...

 

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Question 3) A dry gas reservoir with consistent thickness measuring 64 feet, a porosity of 19%, an initial water saturation of 26%, and an average areal extent of 1283.3 acres. The gas deviation factor is 0.83 under the initial reservoir pressure of 4450 psia and a reservoir temperature of 175F. A) Calculate the initial in-place gas per acre-foot of bulk reservoir rock. B) In how many years will a well in this reservoir deplete 50% of a drainage area covering 320 acres, operating at a rate of 2 MM SCF/day? C) If the reservoir experiences a strong water drive resulting in a minimal decline in reservoir pressure, and 50.4 MMM SCF of gas is produced while 40960 acre-ft of the reservoir is invaded by water, what is the gas saturation as a percentage of total pore space in the portion of the reservoir invaded by water? What is the percentage of gas recovery factor? No water production to date. Question 3) A dry gas reservoir with consistent thickness measuring 64 feet, a porosity of 19%, an initial water saturation of 26%, and an average areal extent of 1283.3 acres. The gas deviation factor is 0.83 under the initial reservoir pressure of 4450 psia and a reservoir temperature of 175F. A) Calculate the initial in-place gas per acre-foot of bulk reservoir rock. B) In how many years will a well in this reservoir deplete 50% of a drainage area covering 320 acres, operating at a rate of 2 MM SCF/day? C) If the reservoir experiences a strong water drive resulting in a minimal decline in reservoir pressure, and 50.4 MMM SCF of gas is produced while 40960 acre-ft of the reservoir is invaded by water, what is the gas saturation as a percentage of total pore space in the portion of the reservoir invaded by water? What is the percentage of gas recovery factor? No water production to date.