Considerations for the Design of Sinusoidal Slug Testing Methods

ratio values ranging from 12 to 2, which corresponded to maximum discrepancies of 8% to 29%, respectively. These analyses suggest that methods featuring a rotating drive coupled to an effective transfer link are suboptimal. Instead, designs featuring either modified flywheel apparatus or winches driven by digitally controlled stepper motors can minimize the potential for discrepancies between intended and actual slug movement. The accurate generation of sinusoidal slug movement will minimize uncertainties associated with hydraulic properties inversely estimated from observations acquired during sinusoidal slug testing.