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Keywords: prediction
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Proceedings Papers

Publisher: BHR Group
Paper presented at the 11th North American Conference on Multiphase Production Technology, June 6–8, 2018
Paper Number: BHR-2018-461
... 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...
Proceedings Papers

Publisher: BHR Group
Paper presented at the 11th North American Conference on Multiphase Production Technology, June 6–8, 2018
Paper Number: BHR-2018-097
... 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...
Proceedings Papers

Publisher: BHR Group
Paper presented at the 11th North American Conference on Multiphase Production Technology, June 6–8, 2018
Paper Number: BHR-2018-153
... 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...
Proceedings Papers

Publisher: BHR Group
Paper presented at the 11th North American Conference on Multiphase Production Technology, June 6–8, 2018
Paper Number: BHR-2018-169
... 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...
Proceedings Papers

Publisher: BHR Group
Paper presented at the 11th North American Conference on Multiphase Production Technology, June 6–8, 2018
Paper Number: BHR-2018-245
... 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...
Proceedings Papers

Publisher: BHR Group
Paper presented at the 11th North American Conference on Multiphase Production Technology, June 6–8, 2018
Paper Number: BHR-2018-281
... 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...
Proceedings Papers

Publisher: BHR Group
Paper presented at the 11th North American Conference on Multiphase Production Technology, June 6–8, 2018
Paper Number: BHR-2018-341
... 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...
Proceedings Papers

Publisher: BHR Group
Paper presented at the 11th North American Conference on Multiphase Production Technology, June 6–8, 2018
Paper Number: BHR-2018-405
... 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...
Proceedings Papers

Publisher: BHR Group
Paper presented at the 10th North American Conference on Multiphase Technology, June 8–10, 2016
Paper Number: BHR-2016-033
... measurements against OLGA HD 2015.1 and the predictions are very good. The theory presented in this paper explains the liquid removal process seen in the experiments. Introduction Multiphase flow simulation of gas-condensate-water pipeline transport with low liquid loading is a challenging task. Important...
Proceedings Papers

Publisher: BHR Group
Paper presented at the 10th North American Conference on Multiphase Technology, June 8–10, 2016
Paper Number: BHR-2016-087
... to be transported and postpones the transition from annular to churn flow to lower gas velocities, which improves the upward transport 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...
Proceedings Papers

Publisher: BHR Group
Paper presented at the 10th North American Conference on Multiphase Technology, June 8–10, 2016
Paper Number: BHR-2016-003
... 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...
Proceedings Papers

Publisher: BHR Group
Paper presented at the 10th North American Conference on Multiphase Technology, June 8–10, 2016
Paper Number: BHR-2016-285
... 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...
Proceedings Papers

Publisher: BHR Group
Paper presented at the 10th North American Conference on Multiphase Technology, June 8–10, 2016
Paper Number: BHR-2016-385
... 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...
Proceedings Papers

Publisher: BHR Group
Paper presented at the 10th North American Conference on Multiphase Technology, June 8–10, 2016
Paper Number: BHR-2016-403
... 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...
Proceedings Papers

Publisher: BHR Group
Paper presented at the 10th North American Conference on Multiphase Technology, June 8–10, 2016
Paper Number: BHR-2016-421
... 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...
Proceedings Papers

Publisher: BHR Group
Paper presented at the 10th North American Conference on Multiphase Technology, June 8–10, 2016
Paper Number: BHR-2016-433
... 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...
Proceedings Papers

Publisher: BHR Group
Paper presented at the 10th North American Conference on Multiphase Technology, June 8–10, 2016
Paper Number: BHR-2016-459
... 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...
Proceedings Papers

Publisher: BHR Group
Paper presented at the 10th North American Conference on Multiphase Technology, June 8–10, 2016
Paper Number: BHR-2016-473
... 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...
Proceedings Papers

Publisher: BHR Group
Paper presented at the 9th North American Conference on Multiphase Technology, June 11–13, 2014
Paper Number: BHR-2014-G5
... terrain prediction upstream oil & gas riser pressure difference flow rate bhr conference slug modeling & simulation diameter grid size slug catcher liquid height unit cell model experiment experimental series amplitude pipeline transient behavior ledaflow Terrain slugging...
Proceedings Papers

Publisher: BHR Group
Paper presented at the 9th North American Conference on Multiphase Technology, June 11–13, 2014
Paper Number: BHR-2014-A3
... surveillance gas flow dry-up process prediction flow rate oil case production monitoring upstream oil & gas experiment Experiments on gas flow with wet pipe walls A Shmueli 1, M Khatibi 1,T Arnulf 1, B Djoric 2, O J Nydal 1 1 Norwegian University of Science and Technology, Norway 2 Stavanger...

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