... ABSTRACT Annular flow is characterized by a high velocity gas core flow, with a thin liquid film around it, adjacent to the pipe wall. It is frequently observed in a wide range of industrial facilities, in particular during oil and gas exploitation, where high gas-oil ratios are found. Droplet...

... case, the model covers all stages from a pure stratified flow at low gas rates to stratified annular flow for intermediate gas rates to (in the case of low liquid loading) pure annular flow at high rates. Model predictions are in good agreement with the SINTEF data. 1 INTRODUCTION Annular stratified...

... occur when the annular flow pattern changes to stratified or a slug to pseudo-slug flow pattern. The finding that the slug flow regime change to wavy stratified pattern or the annular regime to stratified pattern at large drag reduction could be very important in some applications. multiphase...

... turndown and liquid accumulation curves are obtained. relative error reservoir surveillance production logging flow regime database prediction bhr group 2011 olga 5 correspond vertical pipe annular flow field data fraction production monitoring production control slug flow boussen...

... testing flow pattern upstream oil & gas production monitoring bhr group 2009 production control drillstem testing pressure gradient transition annular flow imperial college flowrate void fraction steady state slug flow reservoir surveillance An experimental study of wellbore phase...

... ABSTRACT In this paper we propose some experimental results on the start-up of a core annular flow from a stratified condition. During normal core annular flow operations, due to fouling or pump failures, a core flow may not be sustained anymore and hence it stratifies. Since the pressure...

... of erosion for annular flow. A semi-mechanistic model to predict erosion in annular flow is also outlined that accounts for the upstream flow orientation. production monitoring gas core particle horizontal flow production control upstream oil & gas annular flow production logging reservoir...