...-in will be affected by the frac-fluid warming if the fluid is compressible. The higher the gas quality of a foam is, the more pronounced this effect will be. The leakoff coefficient evaluated frompressure decline using the Nolte model will be in error at early shut-in time. The wellbore fluid warming adds more...

... sandface pressure rise ∆p w = buildup pressure rise = P ws - P wf,s ∆p* = difference between pressure at shut-in, p ws , and the extrapolated flowing pressure, p wf . ∆q = the afterflow rate change =q{t + ∆t)-q(t) Also t is the flow time prior to shut-in and Δ t is the shut-in time...

... pressure. flow rate oil permeability equation pressure buildup data semilog plot oil saturation correct value effective oil permeability reservoir shut-in time permeability solution-gas-drive reservoir skin factor semilog straight line buildup data drillstem/well testing drillstem...

... are interpreted to range from .06 to .21 millidarcies. shut-in time gas production reservoir surveillance production control uinta basin thickness sand thickness boardman drillstem testing reservoir pressure horner plot knutson pressure buildup approximation drillstem/well testing water...

... the lifetime of the treatment. Corrosion Inhibition enhanced recovery Upstream Oil & Gas calculation oilfield chemistry Corrosion Management gas well H2S management Effectiveness Production Chemistry inhibitor evaluation batch treatment Saturate production rate shut-in time Corrosion...