.... production control Upstream Oil & Gas Reservoir Surveillance production logging inverse algorithm boundary condition software long shut-in time spe annual technical conference perforation production monitoring flow allocation commercial software operation fluid injectivity simulator...

... than λ . In 1987 W.J. Lee 1 developed a procedure which predicts the flow and shut-in time needed to get the necessary information from a single porosity tight gas formation at constant or smoothly changing production rate. Key to his proposed procedure is having a good value of initial...

... compressor flow rate spe 100590 control system gas well productivity production control Upstream Oil & Gas critical rate surface condition shut-in time packer society of petroleum engineers production rate gas recirculation compression low-rate gas well deliquify low-rate gas well valve...

... of the drawdown derivative. Moreover, the shape of the buildup derivative is strongly affected by the duration of the preceding drawdown. This paper investigates the shape of the equivalent-time-derivative when plotted against both equivalent time and real time (shut-in time) coordinates. Using computer...

... estimate gas conductivity dimensionless time upstream oil & gas spe 17707 average reservoir pressure drillstem/well testing reservoir short-term pressure buildup test time interval reservoir pressure gas reservoir buildup test case 2 shut-in time static condition balance equation...

.... the logarithm of delta t. Here, tp is the producing time prior to shut-in and delta t is the shut-in time. These methods show that such a graph should yield a straight line, whose slope is inversely proportional to the permeability-thickness product, proportional to the permeability-thickness product, kh...