Pipe-Diameter Effect on Liquid Loading in Vertical Gas Wells

Skopich, Anton; Pereyra, Eduardo; Sarica, Cem; Kelkar, Mohan

doi:10.2118/164477-pa

Cited by 30 publications

(19 citation statements)

References 13 publications

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“…It exhibits an inverse relationship and an ability to adjust to the liquid velocity, system pressure, and pipe diameter. The previous data [18], [35], [36] show good agreement at low superficial liquid velocities of between 0.01-0.05 m/s, while the current data, which gave higher film thicknesses due to the larger liquid flow rates, showed that the correlation also gives excellent predictions at higher liquid flow.…”

Section: Figure 12: Bar Charts Showing Comparison Between the Non-dimsupporting

confidence: 75%

“…A wide range of flow regimes was covered in the experiments, and for the comparisons, careful screening was done to select only those that fall in the annular regime ( Figure 10). Previous measurements of a liquid holdup in a 101.6-mm riser were also used to study liquid loading phenomena [35]. Those experiments were carried out around atmospheric pressure, and 9 data points…”

Section: Description Of Large Pipe Experimental Datasetsmentioning

confidence: 99%

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Upward gas–liquid two-phase flow after a U-bend in a large-diameter serpentine pipe

Aliyu

Almabrok

Baba

et al. 2017

International Journal of Heat and Mass Transfer

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We present an experimental study on the flow behaviour of gas and liquid in the upward section of a vertical pipe system with an internal diameter of 101.6 mm and a serpentine geometry. The experimental matrix consists of superficial gas and liquid velocities in ranges of 0.15 to 30 m/s and from 0.07 to 1.5 m/s, respectively, which cover bubbly to annular flow. The effects on the flow behaviours downstream of the 180° return bend are significantly reduced when the flow reaches an axial distance of 47 pipe diameters from the U-bend. Therefore, reasonably developed flow is attained at this development length downstream of the bend. Other published measurements for large-diameter film thickness show similar trends with respect to the superficial gas velocity. However, the trends differ from those of small-diameter pipes, with which the film thickness decreases much faster with increasing gas flow. As a result, only a few of the published correlations for small pipe data agreed with the experimental data for large pipe film thickness. We therefore modified one of the bestperforming correlations, which produced a better fit. Qualitative and statistical analyses show that the new correlation provides improved predictions for two-phase flow film thickness in large-diameter pipes.

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Section: Figure 12: Bar Charts Showing Comparison Between the Non-dimsupporting

confidence: 75%

Section: Description Of Large Pipe Experimental Datasetsmentioning

confidence: 99%

Upward gas–liquid two-phase flow after a U-bend in a large-diameter serpentine pipe

Aliyu

Almabrok

Baba

et al. 2017

International Journal of Heat and Mass Transfer

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“…Since many of the studies have not been focused on down-and up-ward flow, the primary purpose of it, is to propose the CFD as a reliable alternative for the prediction of flow patterns and operational parameters such as void fraction in comparison to empirical correlations or other commercial computational codes. For this, it is used to replicate and validate the CFD model against 36 different experimental conditions from Chung [2] and Skopich [23]. Then, a comparison of the obtained results against two other methods like OLGA and 66 empirical correlations for the void fraction prediction will be made.…”

Section: State Of the Artmentioning

confidence: 99%

“…Two different experimental facilities were used, both located at University of Tulsa (Tulsa, OK, US) and described in detail by Chung [2] and Skopich [23], this section makes a brief description of these facilities.…”

Section: Experimental Facilities For the Oil-gas Flow Measurementsmentioning

confidence: 99%

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CFD modelling of two-phase gas–liquid annular flow in terms of void fraction for vertical down- and up-ward flow

et al. 2019

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Two-phase flows are present in all the value chain of the oil industry, being of significant interest in pipeline transportation. They are essential for the calculation of production rates or separation process design; therefore, multiphase flows have been studied for several years, and numerous models, data banks and computational software have been developed to design more efficient processes. For this reason, the purpose of this study is to develop a CFD numerical model capable of predicting air-oil and air-water annular flow for up-and downward flows in vertical pipes with the objective of present a methodology to develop a reliable numerical model and present CFD tools as an alternative to the empirical models, or other commercial computational codes such as the dynamic multiphase flow simulators, for the study of multiphase flow. To achieve this objective, 36 simulations using CFD were compared against 150 simulations using OLGA and 66 different empirical correlations to predict void fraction and compare the obtained results against experimental data. Different liquid viscosities (0.00089, 0.127, 0.213, 0.408 and 0.586 Pa s) and three different pipelines were used: a 22.72 m long and 0.0508 m ID pipe, a 15.24 m long and 0.0508 m ID pipe, and a 15.24 m long and 0.1016 m ID pipe. The obtained results showed that the CFD model accurately predicts the void fraction for both down-and upward cases, while the obtained results using OLGA and the empirical correlations showed a lower accuracy.

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Void fraction development in gas-liquid flow after a U-bend in a vertically upwards serpentine-configuration large-diameter pipe

et al. 2017

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We investigate the effect of a return U-bend on flow behaviour in the vertical upward section of a largediameter pipe. A wire mesh sensor was employed to study the void fraction distributions at axial distances of 5, 28 and 47 pipe diameters after the upstream bottom bend. It was found that, the bottom bend has considerable impacts on up-flow behaviours. In all conditions, contour plots of the crosssectional phase distribution measurement using the wire mesh sensor (WMS) show that centrifugal effect of the U-bend causes appreciable misdistribution in the adjacent straight section. However, flow asymmetry significantly reduces at an axial distance of 47D from the U-bend. Flow regime maps generated from three axial locations showed that, in addition to bubbly, intermittent and annular flows, oscillatory flow occurred particularly when gas and liquid flow rates were relatively low. At this position, the mean void fractions were in agreement with those from other large-pipe studies.Comparisons were made with existing void fraction correlations. Among the correlations surveyed, drift flux-type correlations were found to give the best predictive results.

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Pipe-Diameter Effect on Liquid Loading in Vertical Gas Wells

Cited by 30 publications

References 13 publications

Upward gas–liquid two-phase flow after a U-bend in a large-diameter serpentine pipe

Upward gas–liquid two-phase flow after a U-bend in a large-diameter serpentine pipe

CFD modelling of two-phase gas–liquid annular flow in terms of void fraction for vertical down- and up-ward flow

Void fraction development in gas-liquid flow after a U-bend in a vertically upwards serpentine-configuration large-diameter pipe

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