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p = absolute pressure, Pisa V = volume, ft 3 T = absolute temperature, °R n = number of moles of ... more p = absolute pressure, Pisa V = volume, ft 3 T = absolute temperature, °R n = number of moles of gas, lb-mole R = the universal gas constant, which, for the above units, has the value 10.730 psia ft 3 /lb-mole °R Behavior of Ideal Gases : Standard Volume : In many natural gas engineering calculations, it is convenient to measure the volume occupied by l lb-mole of gas at a reference pressure and temperature. These reference conditions are usually 14.7 psia and 60°F, and are commonly referred to as standard conditions. The standard volume is defined as the volume of gas occupied by 1 lb-mol of gas at standard conditions. Standard Condition: T=60 °F P=14.7 Vsc =379.4 scf/lb-mol T=60 °F P=14.65 Vsc =380.9 scf/lb-mol American Standard Condition: V sc = standard volume, scf/lb-mol Scf = standard cubic feet T sc = standard temperature, °R P sc = standard pressure, psia R = the universal gas constant n × V sc = V gas [lb-mole] × [scf/lb-mol] = [scf] m = weight of gas, lb M = molecular weight, lb/lb-mol ρ g = density of the gas, lb/ft 3 PV = nRT Gas Density : m n M g m PM v RT m PV RT M Specific Gravity : Ma = apparent molecular weight of a gas mixture Mi = molecular weight of the its component in the mixture yi = mole fraction of component i in the mixture γ g = gas specific gravity ρ air = density of the air M air = apparent molecular weight of the air = 28.96 Ma = apparent molecular weight of the gas P sc = standard pressure, psia Tsc = standard temperature, °R
The mathematical expressions that are used to predict the volumetric performance and pressure beh... more The mathematical expressions that are used to predict the volumetric performance and pressure behavior of the reservoir vary in forms and complexity depending upon the number of mobile fluids in the reservoir. There are generally three cases of flowing systems:
Introduction to well testing Analysis
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Introduction to well testing Analysis
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Teaching Documents by amin nzh