.... Inclination angles varied from 30 ? to 70 ? from horizontal. The fluids used were air and water. Measurements included fluid velocities and reversal point. High-speed video cameras were used to record the flow regime transition (slug to annular) present in the system. Prediction using the film reversal models...

...-phase flow pattern in vertical pipe flow. Further objective is to develop new/improve existing mechanistic flow-pattern-transition models for high-liquid viscosity two-phase flow in upward vertical pipe flow. High-liquid viscosity flow pattern two-phase flow data was collected from open literature...

...]. Additionally, it has been reported that as system pressure increases, slugs may gradually evolve into smaller slugs or pseudo-slugs [8, 9], and the transition from slugs to pseudo-slugs may occur at lower vSG [10, 11], suggesting the importance of pseudo-slugs in high pressures. pseudo-slug flow...

... orifice gas velocity pressure increase experiment transition pressure drop gas well deliquification artificial lift system production control liquid injection separator drawdown liquid loading Unstable well behaviour in gas well liquid loading stability tests A van Wijhe, S P C Belfroid...

... in the industry, on an extended set of field data from a large gas-condensate pipeline with three-phase flow. A steep escarpment strongly influences the dynamics of pipeline pressure, and liquid content and outlet rates; production rates span the region of transition between separated and slug flow regimes. ‘Out...

... to improve the overall holdup and pressure drop predictions significantly. ledaflow viscosity slug gas fraction experiment liquid pipe bubbly flow prediction fraction transition gas fraction multiphase flow regime production monitoring reservoir surveillance reynolds number equation...

... a transition to stratified flow when the plate height closely matched the in situ water height at low water cuts. Introduction The flow of oil and water in pipes is commonly encountered in a number of industrial processes. These systems are particularly relevant to the oil industry in which achieving...

..., strategies to reduce this problem will be considered in a rigorous way. One of the approaches to understand the slug flow pattern is experiments and improved mathematical models that predict both the flow pattern transitions and the slug flow characteristics. To this end, an experimental study of three...

... and corrosion riser corrosion upstream oil & gas risk assessment production chemistry scale inhibitor transition enhanced recovery wax inhibition scale inhibition chemical injection flowline corrosion bhr group 2015 flow regime remediation of hydrates hydrate remediation injection valve...

... well cases while it went from 90% to 94% for all of the data set, making it the best published mechanistic gas-liquid flow model for vertical upward flow from among the three models benchmarked in this study. production logging transition pressure drop two-phase flow implementation...

.... pressure drop reduction reservoir surveillance pipe polymer concentration production logging master solution ppm reduction drp concentration flow pattern upstream oil & gas drag reduction transition stratified flow production monitoring production control bhr group 2011 id pipe pipe...

... and evaluated against data. A method for a seam­less transition between the two models is also presented. The result is a unified model, valid for inclinations from −5° (downward) to +90° (vertical upward), suitable for the strict requirements of complex coupled system optimization where smoothness...

... 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...

... upstream oil & gas pressure loss diameter transition bhr group 2007 experimental data configuration 1 flow pattern annular geometry mechanistic model multiphase production technology 13 production logging pressure loss estimation Analysis of two-phase fluid flow through fully eccentric...

... pipeline has no significant effect on flow pattern in the riser. The experimental flow pattern transitions of Omebere-Iyari (1) are compared to published theoretical models by Taitel et al. (11) and Barnea (12). Significant disparities exist between the predictions from theory and the experimental...

... ABSTRACT In slightly upwardly inclined pipes with low liquid flow rates there exists a region were the holdup increases almost like a discontinuity with decreasing gas flow. To predict this transition region accurately is of great importance for design and operation of gas-condensate pipelines...

... ABSTRACT A new theoretical model has been developed for determining flow regime transitions in two-phase gas-liquid flow in horizontal pipes. The theoretical model provides a physical explanation for the development of the perturbed interface of the stratified flow into a roll wave or slug...

... ABSTRACT The aim of the present paper is to present an experimental method for the prediction of slug-churn transition in two-phase flow. It starts with the transformation of existing flow regime maps in the literature into preselected coordinate systems, convenient for airlift pump...

... ABSTRACT Severe slugging is reported from some field operations, when an increase in the production rate leads to a transition from steady stratified flow to slug flow in the pipeline. The slugs can be longer than anticipated for normal hydrodynamic slugging and the flow transients can...

... hydrodynamic slugs are generated in upward inclined sections, where transition from stratified to slug flow occurs, referred to a flow map, and grow large in the downstream stratified section. The field data are attempted to be reproduced by means of dynamic simulations. The discrepancies between the data...