Gas Reservoir p/z Analysis

Perform p/z analysis for gas reservoirs to estimate OGIP (Original Gas in Place). The p/z vs Gp plot is linear for volumetric depletion, with x-intercept = OGIP.

Method:

• Plot p/z vs cumulative production (Gp)
• Extrapolate line to p/z = 0 to find OGIP
• Slope indicates reservoir behavior