CFD numerical simulation of standalone sand screen erosion due to gas-sand flow

Alghurabi, Ahmed; Mohyaldinn, Mysara Eissa; Jufar, Shiferaw Regassa; Younis, Obai; Abduljabbar, Abdullah; Azuwan, Mohd

doi:10.1016/j.jngse.2020.103706

Cited by 36 publications

(17 citation statements)

References 18 publications

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“…Erosion of the sand-control screen could be attributed to the high-velocity fluid flow accompanied by sand particles. Erosion of the sand-control screen has attracted attention from the conventional oil and gas industry − but was rarely discussed in the previous NGH development trials because those short-term NGH production trials were not able to be impacted by erosion. The computational fluid dynamics (CFD) provides a cost-efficiency method for the erosion of screens.…”

Section: Recent Advances In Sand Control Systemmentioning

confidence: 99%

Sand Production Management during Marine Natural Gas Hydrate Exploitation: Review and an Innovative Solution

Chen

et al. 2021

Energy Fuels

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Natural gas hydrate (NGH) is widely distributed worldwide with great reserves and is generally accepted as a promising alternative energy source. However, sustainable, efficient, and safe NGH development has been proven to be restricted by a series of geomechanical problems, among which sand production has become prominent and attention-catching. This review systematically summarizes the up-to-date literatures and reports our latest work to improve the fundamental understandings of the sand production issues in NGH development. It is noted that sand production is defined as a systematic “issue”, rather than a “problem” in this paper, considering both the adverse and favorable influences of sand production on continuous gas production from hydrate-bearing sediment (HBS). Several challenges and insightful suggestions are put forward for future research from the viewpoint of the sand production management system (SMS). Furthermore, an innovative method for unlocking conflicts between sand production and gas extraction in muddy HBS is proposed, namely, the gravel-huff to clay-puff replacement (GCR) technique. The outlook and perspectives of this technique are presented, as well as the key challenges to be resolved.

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Section: Recent Advances In Sand Control Systemmentioning

confidence: 99%

Sand Production Management during Marine Natural Gas Hydrate Exploitation: Review and an Innovative Solution

Chen

et al. 2021

Energy Fuels

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“…There are then several solutions to take into account the presence of viscous effects: (1) Do not solve this region and use a wall law instead, (2) Introduce damping functions forcing the behavior of the model, henceforth called low-Reynolds model, or (3) Solve different equations for the main flow and the near-wall flow. The standard k-ε or RNG models are based on approach (1) [13][14][15][16].…”

Section: Modelling Approach Of the Interface Erosionmentioning

confidence: 99%

Numerical Modeling of Soil Erosion with Three Wall Laws at the Soil-Water Interface

et al. 2021

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In the area of civil engineering and especially hydraulic structures, we find multiple anomalies that weakens mechanical characteristics of dikes, one of the most common anomalies is erosion phenomenon specifically pipe flow erosion which causes major damage to dam structures. This phenomenon is caused by a hole which is the result of the high pressure of water that facilitate the soil migration between the two sides of the dam. It becomes only a question of time until the diameter of the hole expands and causes destruction of the dam structure. This problem pushed physicist to perform many tests to quantify erosion kinetics, one of the most used tests to have logical and trusted results is the HET (hole erosion test). Meanwhile there is not much research regarding the models that govern these types of tests. Objectives: In this paper we modeled the HET using modeling software based on the Navier Stokes equations, this model tackles also the singularity of the interface structure/water using wall laws for a flow turbulence. Methods/Analysis: The studied soil in this paper is a clay soil, clay soil has the property of containing water more than most other soils. Three wall laws were applied on the soil / water interface to calculate the erosion rate in order to avoid the rupture of such a structure. The modlisitation was made on the ANSYS software. Findings: In this work, two-dimensional modeling was carried of the soil.in contrast of the early models which is one-dimensional model, the first one had shown that the wall-shear stress which is not uniform along the whole wall. Then using the linear erosion law to predict the non-uniform erosion along the whole length. The previous study found that the wall laws have a significant impact on the wall-shear stress, which affects the erosion interface in the fluid/soil, particularly at the hole's extremes. Our experiment revealed that the degraded profile is not uniform. Doi: 10.28991/cej-2021-03091742 Full Text: PDF

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“…Realizable K-epsilon model was applied with standard wall function. Further details of the governing equation of the realizable K-epsilon turbulence model were given by Alghurabi et al (2021). The time step size for the calculations was kept to 0.001 s. PISO scheme was used for the pressure-velocity coupling method.…”

Section: Cfd Solver Setupmentioning

confidence: 99%

Numerical evaluation of separation efficiency in the diverging T-junction for slug flow

Ejaz

Pao

Ali

2021

HFF

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Purpose Offshore industries encounter severe production downtime due to high liquid carryovers in the T-junction. The diameter ratio and flow regime can significantly affect the excess liquid carryovers. Unfortunately, regular and reduce T-junctions have low separation efficiencies. Ansys as a commercial computational fluid dynamics (CFD) software was used to model and numerically inspect a novel diverging T-junction design. The purpose of diverging T-junction is to merge the specific characteristics of regular and reduced T-junctions, ultimately increasing separation efficiency. The purpose of this study is to numerically compute the separation efficiency for five distinct diverging T-junctions for eight different velocity ratios. The results were compared to regular and converging T-junctions. Design/methodology/approach Air-water slug flow was simulated with the help of the volume of the fluid model, coupled with the K-epsilon turbulence model to track liquid-gas interfaces. Findings The results of this study indicated that T-junctions with upstream and downstream diameter ratio combinations of 0.8–1 and 0.5–1 achieved separation efficiency of 96% and 94.5%, respectively. These two diverging T-junctions had significantly higher separation efficiencies when compared to regular and converging T-junctions. Results also revealed that over-reduction of upstream and downstream diameter ratios below 0.5 and 1, respectively, lead to declination in separation efficiency. Research limitations/implications The present study is constrained for air and water as working fluids. Nevertheless, the results apply to other applications as well. Practical implications The proposed T-junction is intended to reduce excessive liquid carryovers and frequent plant shutdowns. Thus, lowering operational costs and enhancing separation efficiency. Social implications Higher separation efficiency achieved by using diverging T-junction enabled reduced production downtimes and resulted in lower maintenance costs. Originality/value A novel T-junction design was proposed in this study with a separation efficiency of higher than 90%. High separation efficiency eliminates loss of time during shutdowns and lowers maintenance costs. Furthermore, limitations of this study were also addressed as the lower upstream and downstream diameter ratio does not always enhance separation efficiency.

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CFD numerical simulation of standalone sand screen erosion due to gas-sand flow

Cited by 36 publications

References 18 publications

Sand Production Management during Marine Natural Gas Hydrate Exploitation: Review and an Innovative Solution

Sand Production Management during Marine Natural Gas Hydrate Exploitation: Review and an Innovative Solution

Numerical Modeling of Soil Erosion with Three Wall Laws at the Soil-Water Interface

Numerical evaluation of separation efficiency in the diverging T-junction for slug flow

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