Computational Fluid Dynamics-Based Study of an Oilfield Separator--Part II: An Optimum Design

Laleh, Ali Pourahmadi; Svrcek, William Y.; Monnery, Wayne D.

doi:10.2118/161036-pa

Cited by 19 publications

(4 citation statements)

References 6 publications

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“…This behavior was highly desirable in the gas-liquid separator system context. Most separators are sized to provide enough retention time to allow gas bubbles to form and separate out [20]. Hence, the cyclonic chamber may reduce the separator size, in addition to the flow distribution advantage.…”

Section: Resultsmentioning

confidence: 99%

Multiple Wire-Mesh Sensors Applied to the Characterization of Two-Phase Flow inside a Cyclonic Flow Distribution System

Ofuchi

Eidt

Rodrigues

et al. 2019

Sensors

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Wire-mesh sensors are used to determine the phase fraction of gas–liquid two-phase flow in many industrial applications. In this paper, we report the use of the sensor to study the flow behavior inside an offshore oil and gas industry device for subsea phase separation. The study focused on the behavior of gas–liquid slug flow inside a flow distribution device with four outlets, which is part of the subsea phase separator system. The void fraction profile and the flow symmetry across the outlets were investigated using tomographic wire-mesh sensors and a camera. Results showed an ascendant liquid film in the cyclonic chamber with the gas phase at the center of the pipe generating a symmetrical flow. Dispersed bubbles coalesced into a gas vortex due to the centrifugal force inside the cyclonic chamber. The behavior favored the separation of smaller bubbles from the liquid bulk, which was an important parameter for gas-liquid separator sizing. The void fraction analysis of the outlets showed an even flow distribution with less than 10% difference, which was a satisfactorily result that may contribute to a reduction on the subsea gas–liquid separators size. From the outcomes of this study, detailed information regarding this type of flow distribution system was extracted. Thereby, wire-mesh sensors were successfully applied to investigate a new type of equipment for the offshore oil and gas industry.

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Section: Resultsmentioning

confidence: 99%

Multiple Wire-Mesh Sensors Applied to the Characterization of Two-Phase Flow inside a Cyclonic Flow Distribution System

Ofuchi

Eidt

Rodrigues

et al. 2019

Sensors

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“…Hence, the sloshing in the AGRU is responsible for the decrease of removal efficiencies of CO 2 and H 2 S to 11.3% and 50%, respectively. Furthermore, if only the liquid carryover due to sloshing in multiphase separators is considered, the sweet gas production rate is 18.5 MMCFD. − …”

Section: Modeling and Resultsmentioning

confidence: 99%

Sloshing Impact on Gas Pretreatment for LNG Plants Located in a Stranded Offshore Location

Mahmud

Mazumder

et al. 2018

Ind. Eng. Chem. Res.

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Sloshing behaviors in liquid containers have been thoroughly studied for several decades by both experiments and numerical simulations. However, very few efforts are devoted to address the performance of gas pretreatment system of FLNG (floating liquefied natural gas) plants, particularly for the liquid entrainment estimation in the gas phase of multiphase separators. In this work, a multiscale simulation method was performed to study the sloshing impact on gas pretreatment for FLNG plants. First, computational fluid dynamics (CFD) simulations were performed to quantify liquid entrainment for oil–gas separator under sloshing. Next, CFD results were utilized by the gas pretreatment process modeling, where flow maldistribution in the oil–gas separator and absorption column due to sloshing was coupled with steady-state process simulations. Results show that the sloshing behavior increases the amount of liquid carryover into the gas phase substantially, while the performance of the gas pretreatment system decreases consequently.

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“…Effects on droplet evolution under various conditions, using computational fluid dynamics, provide better information about the overall behavior of the dispersions in the process [11]. Computational fluid dynamics is heavily utilized, to study and optimize the phase interactions during gravity separation [12,13]. The implementation of population balance models in computational fluid dynamic codes provides an even better insight into the separation process [14].…”

Section: Introductionmentioning

confidence: 99%

Dynamic Simulation of a Gas and Oil Separation Plant with Focus on the Water Output Quality

Jonach,

Haddadi,

Jordan

et al. 2023

Energies

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Gas and oil separation plants are the first main step in the production of hydrocarbon products. Depending on the properties of the recovered components from the well heads, and the physical properties in the underground rock reservoir, the plant design can vary in different ways. In mature oil and gas fields, secondary recovery methods are often used, which include the injection of large amounts of water into the underground reservoir, to induce the production flow of the wells. The handling of this water is of significant interest, in terms of production efficiency and pollution reduction, because the water comes into contact with the environment during and after recovery operations. In this work, a model of an exemplary gas and oil separation plant was created in Aspen HYSYS V10. A particular focus was placed on the modeling of oil residues in the water-bearing plant components. This model was then extended by the implementation of different process control schemes, to create a predictive model that could represent dynamic operating states in the plant components. Two different dynamic changes were then simulated using this model, to showcase the capabilities and capacities of the model.

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Computational Fluid Dynamics-Based Study of an Oilfield Separator--Part II: An Optimum Design

Cited by 19 publications

References 6 publications

Multiple Wire-Mesh Sensors Applied to the Characterization of Two-Phase Flow inside a Cyclonic Flow Distribution System

Multiple Wire-Mesh Sensors Applied to the Characterization of Two-Phase Flow inside a Cyclonic Flow Distribution System

Sloshing Impact on Gas Pretreatment for LNG Plants Located in a Stranded Offshore Location

Dynamic Simulation of a Gas and Oil Separation Plant with Focus on the Water Output Quality

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