... and their usefulness was demonstrated. Numerical examples with both pressure build-up and drawdown data were also demonstrated for this procedure. Upstream Oil & Gas inclination angle Drillstem Testing pressure derivative plot flow line pseudo-radial flow line hydraulic fracturing hd 0 regime...

... is above the plunger, the pressure spike always occurs and once the plunger arrives in the lubricator the tubing pressure rapidly drops as the gas flows unrestricted into the surface flow line. If there is no liquid above the plunger, there may be a sudden, slight increase in the tubing pressure...

... and, (21) t * Δ m ' ( p ) w U S B L i = 0.25 m B L t U S B L i 0.25 Linear and bilinear flow interrelationships If the formation linear flow regime is observed after the bilinear flow line, then the equations developed by Tiab 7...

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... this regime. The bilinear flow line is not likely however to be observed in the case of a high conductivity fracture. (c) As time increases, a formation linear flow period might develop, and can be identified by a straight line of slope 0.5. Segment I-J (case II) represents in fracture with high conductivity...

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