Low-Liquid Loading Multiphase Flow in Natural Gas Pipelines

Ayala, Luis F.; Adewumi, Michael A.

doi:10.1115/1.1616584

Cited by 30 publications

(14 citation statements)

References 18 publications

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“…This area is calculated on the basis of basic geometric considerations. The expression for the volumetric interfacial areas is given by As suggested by Ayala and Adewumi (2003), this model treats the dispersed droplets in the gas stream as rigid spheres and uses a correlation proposed by Clift et al (1978) for estimating the interfacial friction factor.…”

Section: Nomenclaturementioning

confidence: 99%

“…Detailed description of closing relationships for other flow patterns can be found in the work of Ayala and Adewumi (2003).…”

Section: Nomenclaturementioning

confidence: 99%

“…These thermo/hydrodynamic models have sought to address an operational problem while seeking a fundamental understanding of two-phase (gas/ condensate) flow in pipes. The work is well documented in the literature and needs not be repeated here Mucharam et al 1990;Ayala and Adewumi 2003).…”

Section: Introductionmentioning

confidence: 99%

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Compositional Modeling of Two-Phase (Gas/Water) Flow in Pipes

Zaghloul¹,

Adewumi

Ityokumbul

2009

SPE Journal

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The current work presents a fully compositional tool for modeling systems exhibiting two-phase (gas/water) flow. The tool couples complex hydrodynamic and thermodynamic models to describe the behavior of fluids flowing in a pipe. The model described herein focuses on gas transmission with low-liquid loading conditionsResults show the model is capable of predicting the hydrodynamic behavior as well as the compositional profiles of gas and water flowing in a pipe. This is important in the light of compositional dependence of hydrate or acid formation. Compositional changes in the aqueous phase may create the conditions for forming hydrates or acids.The model was benchmarked using several published works, details of which can be found in the work of Zaghloul (2006). In this paper, model performance is illustrated using a case study. The case study compares model calculations with an experimental data set obtained from Eaton et al. (1967). Model calculations predicted the observed flow pattern, pressure and liquid holdup profiles reported in the case study. Calculated pressures are within 2% of experimental values, while liquid holdup (approx 4%) is in agreement with the value predicted by Eaton's correlation (Eaton et al. 1967).The model is capable of predicting the initial water condensation point in the pipeline and the concentration of different substances in the aqueous mixture. The tool gives production engineers important information on how much hydrate/corrosion inhibitors to inject and where, thus saving in the design, operation, and maintenance of pipeline systems.

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Section: Nomenclaturementioning

confidence: 99%

“…Detailed description of closing relationships for other flow patterns can be found in the work of Ayala and Adewumi (2003).…”

Section: Nomenclaturementioning

confidence: 99%

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Compositional Modeling of Two-Phase (Gas/Water) Flow in Pipes

Zaghloul¹,

Adewumi

Ityokumbul

2009

SPE Journal

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“…There have been a number of works conducted on studying fluid flowing in straight pipes [7][8][9][10] and in curved pipes [11][12][13][14]. Eutice [14] found secondary flow in coiled pipes.…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigations of Droplet Deposition and Coalescence in Curved Pipes

Nguyen

Wang

Mohan

et al. 2014

Journal of Energy Resources Technology

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Even though there have been several studies conducted by the industry on the use of different inlet devices for gas-liquid separation, there have been limited laboratory and field evaluations on the use of external piping configurations as flow conditioning devices upstream of a separator inlet. The results of a systematic study of droplet deposition and coalescence in curved pipe and pipe fittings are reported in this paper. A facility has been designed consisting of two main test sections: a fixed horizontal straight pipe section and an interchangeable 180 deg return pipe section (or curved pipe section) of the same length. Both inlet and outlet to the 180deg return are horizontal, but the plane of the 180 deg return pipe section can pivot about the axis of the inlet horizontal pipe to an angle as much as 10 deg downwards allowing downward flow in the return section. Various pipe fittings of different radius of curvature can be installed for comparison in the 180 deg return. Eittings evaluated in this study included: 180 deg pipe bend, short elbow bend (with standard radius of curvature of 1.5D), long elbow bend (with custom radius of curvature of 6D), target tee bend, and cushion tee bend. Experiments have been carried out using water and air, and varying gas velocities and liquid loadings. In order to compare the peiformance of geometries. Droplet Deposition Eractions (DDE) were measured in the horizontal straight pipe section and in the 180 deg return pipe section as a measure of coalescence efficiency. The results demonstrate that higher DDE occurs for curved fittings as compared to the straight pipe section. The short elbow bend has approximately 10% DDE higher, whereas long elbow bend along with 180 deg pipe bend peiform better (by 15-20% DDE) than straight pipe. It was found that the cushion tee and target tee bends can coalesce droplets at lower gas velocities but break up droplets at higher gas velocities. Additionally, no significant differences between DDE's in three different inclination angles of a curved pipe were observed. It can be concluded that 180 deg pipe bend or two 6D long radius elbow bend can serve as a droplet coalescer; a pair of cushion tees or target tees can also work as coalescers at low kinetic energy but as atomizers at high kinetic energy.

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“…Several studies have been carried out to simulate and predict the flow conditions in oil and gas wells. Ayala and Adewumi (2003) successfully simulated the transmission pipelines with liquid holdup. Cazaraez and Vásquez (2005) simulated the flow in vertical wells under the transient flow regime.…”

Section: Introductionmentioning

confidence: 99%

Modeling Nonisothermal Rapid Multiphase Flow in Wells Under Nonequilibrium Conditions

Michel

Civan

2006

All Days

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TX 75083-3836, U.S.A., fax 01-972-952-9435. AbstractAn improved non-isothermal mathematical model considering the non-equilibrium effects involved during rapid multiphase flow in wells is presented. The extent of the non-equilibrium effect on deviation from the equilibrium model predictions is delineated at various flow rates, fluid saturations, and temperatures. Applications for three-phase (oil/water/gas) systems are presented. The model presented here can be coupled with reservoir simulation for accurate representation of the well-fluid hydraulics under non-equilibrium and nonisothermal flow conditions.

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Low-Liquid Loading Multiphase Flow in Natural Gas Pipelines

Cited by 30 publications

References 18 publications

Compositional Modeling of Two-Phase (Gas/Water) Flow in Pipes

Compositional Modeling of Two-Phase (Gas/Water) Flow in Pipes

Experimental Investigations of Droplet Deposition and Coalescence in Curved Pipes

Modeling Nonisothermal Rapid Multiphase Flow in Wells Under Nonequilibrium Conditions

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