... multiphase flow sand particle pipe diameter production monitoring upstream oil & gas concentration critical minimum velocity single-phase flow critical velocity threshold concentration reservoir surveillance coefficient pipe Experiments and Modelling of Critical Transport Velocity...

... diameters ranging from 97 to 297 mm and superficial gas velocities lower than the minimum point in the pressure gradient curve. In contrast, the liquid holdup varies up to 100% for the same range of pipe diameters and gas/liquid velocities. The measurements of liquid holdup and pressure gradient are also...

... prediction interface production control production logging genetic algorithm reservoir surveillance coefficient droplet diameter liquid droplet concentration profile pipe diameter artificial intelligence correlation Modelling of liquid droplets concentration profiles in stratified-annular flows...

.... The development length of single-phase flow is generally larger than 10 to 40 pipe diameters, which corresponds to the range of slug lengths encountered at high mixture velocities (e.g. Nydal et al., 1992). It is unlikely that the development length is shorter in a slug than in single-phase flow, meaning...

... of the campaign were to localize the onset of liquid accumulation for decreasing gas flow rate in two-phase low-liquid-loading flows for various pipe diameters, pipe angles and liquid rates (USL), to measure the extent of the regions where multiple holdup solutions exist and to measure the associated liquid...

... was investigated. Mineral oil and co-polymer (Magnafloc 1035) were used. Polymer concentrations between 2 to 30 ppm were investigated. The results showed that pipe diameter has significant effect on drag reduction. Drag reduction of up to 60% was observed in the 25.4 mm pipe while only 50% was achieved in the 19.0...

... results are discussed. velocity profile experiment gas liquid interface entrainment reservoir surveillance flux production logging production control concentration equation diameter pipe diameter droplet entrainment droplet size upstream oil & gas bhr group 2011 two-phase flow...

... surveillance slug catcher stratified flow initiation production monitoring upstream oil & gas transition transient experiment production control production logging criterion pipe diameter pipeline transient behavior slug flow flow rate initial slug slug length diameter slug initiation...