... for its prediction. This study focuses on the evaluation of select entrainment fraction prediction models. Experimental data on liquid entrainment with hydrocarbon fluids in a 3-inch horizontal pipe at 8,375 kPa are presented and compared with predicted values. Two model improvements are proposed...

... ABSTRACT Wax deposition in the onshore and offshore pipelines is a common occurrence and typically hinders the transportation of oil and gas. Accurate prediction of wax deposition in multiphase flow is of great importance to develop economical prevention/remediation strategies. However...

... effects, and the choice of aging/internal diffusion parameter. Traditional approach has been to use a model to tune to small scale flow loop data, and use that model to predict deposition rates in the field – with the understanding that the field predictions will usually be conservative. This approach...

... As the flow rate in gas wells decreases, the liquid content of the well increases (wellbore load up). This can eventually cause the well to die. For many years, people have used the Turner correlation to predict the minimum rate the well can produce without loading. The Turner correlation...

... ABSTRACT Predictions from multiple industrial simulators of multiphase pipeline flow are compared to field data for a hilly terrain, gas-condensate pipeline with three-phase flow. Field conditions studied include quasi-steady flow and ramp-up slugging. Some models predict excessive terrain...

... ABSTRACT Understanding the dynamics of multiphase flows to enable their accurate and efficient prediction is of central importance in the oil-and-gas industry. Despite the significant advances that have been made in modelling these flows over a number of decades, however, numerous challenges...

... as median particle size increased. Samples from the pipe invert were denser and contained larger particles than samples from the pipe top. Two models were tested to predict vertical variations in concentration and particle size. The modified Karabelas model predicted local median particle size within ~ 25...

... with the commercial multiphase simulator LedaFlow [1] did not reproduce this at the time, and the penalty for this discrepancy was that the predicted pressure drop was too high. Consequently, it was concluded that the physical models in LedaFlow needed improvement to predict these conditions better. Through detailed...

... Abstract Heavy oil production and transport remains a challenge due to the lack of understanding of the flow behavior of gas and high viscosity oil two-phase flow in pipes. For example, existing two-phase flow in pipes mechanistic models shows significant discrepancy in predicting high-liquid...

... Multiphase Flow Laboratory, several transient and pseudo transient two- and three-phase experiments were performed. We have compared the experimental measurements against OLGA HD 2015.1 and the predictions are very good. The theory presented in this paper explains the liquid removal process seen...

... of liquid carried by foam. This paper presents a model predicting the foam flow behavior in annular flow conditions down to the transition from annular to churn flow, with which the onset of liquid loading is computed. NOMENCLATURE Roman symbols A+ van Driest constant A Fit parameter (eqn. (20)) A Fit...

... available online. Hierarchical clustering and K-means cluster analysis were applied to test what models consistently rank high for pressure drop prediction. The Relative Grade was used to identify the most robust models that appear consistently within the top ten for all the simulator configurations used...

... discontinuities in two- and three-phase flows " [1]), addressing key flow assurance challenges in the gas condensate field development offshore Tanzania [2]. In the present work we use this new data for the purpose of improving the predictions of LedaFlow. In particular, we are interested in predicting...

... near the transition, and none of the known models for interfacial friction were able to reproduce that. To improve the situation, a new interfacial friction model was derived using the new data, and implemented in LedaFlow. The new model improved the predictions of the high/low holdup transition...

... Abstract Over ten different slug frequency models/correlations were evaluated against experimental data as a part of this study. The effect of parameters such as pressure and flow development length on slug frequencies were studied and comparisons with model predictions were made...

... Abstract In oil and gas production, annular flow is a common flow regime found in wells and pipelines. Predicting erosion in multiphase flow is a challenging task as so many factors and phase interactions are involved. Computational Fluid Dynamics (CFD) offers a way to predict multiphase flow...

... Abstract Majority of existing flow regime transition models do not identify the existence of plug and mist flows. Also, these models are applicable to either vertical or horizontal flow. Further, experimental data in literature show that the model of Taitel and Dukler (1976) under predict...

... and model prediction uncertainty for multiphase flow applications. We demonstrate these methods using three applications, estimation of experimental data uncertainty of erosion extent measurements, quantification of prediction uncertainty of critical velocity for sand transport, and of liquid entrainment...

... and the film thickness is larger on the bottom than on the top making the analysis difficult (2). For this reason in this study a vertical pipe configuration was used. To predict the phase distribution in a pipe, the mass and force balance on the film and the gas core should be written and an estimation...

..., this paper proposes a new semi-mechanistic model for solids transport in pipes taking into account the multiple length scales that exist in stratified multiphase (liquid- gas) flow scenarios. Comparisons of the proposed model predictions to experimental data and existing models are discussed. Keywords...