Simulation and assessment of underwater gas release and dispersion from subsea gas pipelines leak

Li, Xinhong; Chen, Guo-Ming; Zhang, Renren; Zhu, Hui; Fu, Jianmin

doi:10.1016/j.psep.2018.07.015

Cited by 81 publications

(24 citation statements)

References 25 publications

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“…To answer these questions and more, we have simulated a hypothetical major CO 2 blowout from a deep CO 2 injection well–pipeline system and used the output from that simulation as input to a second model to analyze the processes of flow and attenuation of the buoyant CO 2 plume in the water column. The study parallels in some ways the study by Xinhong et al . on natural gas releases from subsea pipelines.…”

Section: Introductionsupporting

confidence: 62%

“…The primary result that seawater is effective at attenuating offshore (subsea) CO 2 blowouts is consistent with what we know about attenuation of natural gas blowouts and seeps and the relatively larger solubility of CO 2 in seawater relative to CH 4 . Specifically, natural gas associated with oil well blowouts is well known to dissolve in the water column for cases of deep‐water blowouts such as the 2010 Macondo well blowout and from theoretical, modeling, and experimental studies . When one considers that CO 2 solubility in water is approximately 25 times larger than that of CH 4 and this factor carries over to seawater, the strong attenuation of CO 2 blowouts is not surprising.…”

Section: Conclusion and Discussionmentioning

confidence: 99%

“…Specifically, natural gas associated with oil well blowouts is well known to dissolve in the water column for cases of deep-water blowouts such as the 2010 Macondo well blowout 64,65 and from theoretical, modeling, and experimental studies. 4,10,66 When one considers that CO 2 solubility in water is approximately 25 times larger than that of CH 4 67 and this factor carries over to seawater, 68,69 the strong attenuation of CO 2 blowouts is not surprising.…”

Section: Conclusion and Discussionmentioning

confidence: 99%

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Major CO₂ blowouts from offshore wells are strongly attenuated in water deeper than 50 m

Oldenburg

Pan

2019

Greenhouse Gases

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Growing interest in offshore geologic carbon sequestration (GCS) motivates evaluation of the consequences of subsea CO2 well blowouts. We have simulated a hypothetical major CO2 well blowout in shallow water of the Texas Gulf Coast. We use a coupled reservoir‐well model (T2Well) to simulate the subsea blowout flow rate for input to an integral model (TAMOC) for modeling CO2 transport in the water column. Bubble sizes are estimated for the blowout scenario for input to TAMOC. Results suggest that a major CO2 blowout in ≥50 m of water will be almost entirely attenuated by the water column due to CO2 dissolution into seawater during upward rise. In contrast, the same blowout in 10 m of water will hardly be attenuated at all. Results also show that the size of the orifice of the leak strongly controls the CO2 blowout rate. © 2019 Society of Chemical Industry and John Wiley & Sons, Ltd.

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Section: Introductionsupporting

confidence: 62%

Section: Conclusion and Discussionmentioning

confidence: 99%

Section: Conclusion and Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Major CO₂ blowouts from offshore wells are strongly attenuated in water deeper than 50 m

Oldenburg

Pan

2019

Greenhouse Gases

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“…The basic system of motion equations (1) -(3) was closed by equations of the "standard" kε turbulence model using the "standard" wall functions when modeling the flow in the boundary layer [9].…”

Section: Mathematical Modelmentioning

confidence: 99%

“…Moreover, the spatio-temporal distribution of the gas-air cloud in the atmosphere is affected by weather conditions and the presence of buildings [5][6][7]. In [8][9][10], numerical methods for determining direct gas losses from aboveground, underground, and underwater gas pipelines, the routes of which can pass through settlements are considered. The calculation of distribution of the damaging factors of accidents on gas pipelines allows us to assess with a reasonable degree of probability the possible zones of damage and the degree of the accident consequences [11,12].…”

Section: Introductionmentioning

confidence: 99%

Damage areas during emergency depressurization of a gas pipeline

et al. 2019

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Main gas pipelines are classified as energetically stressed objects. With an increase in their service life, there appears a need to model emergency breaks and analyze the distribution of the damaging factors of the accident. The main gas pipelines often run near residential areas and cross various communications, therefore possible accidents with gas emissions and damaging factors can negatively affect both the environment and the population. An emergency rupture of a gas pipeline section is numerically modeled in this article. The calculations of intensity of accidental gas emissions outflow and distribution of the accident damaging (the length of the methane jet in unlimited airspace, the range and height of the scattering of the soil and pipe fragments were found). The parameters of free jets of exhaust gas were determined. Such calculation is required during investigation of accidents and development of documents related to the environmentally safe operation of pipeline transport. In case of gas non-ignition, it disperses in the atmosphere with the formation of gas zones. The study of the influence of velocity, density and pressure on the emergency gas emission allows us to determine possible gas contamination zones. Graphs of distribution of static and total pressure over the ejection height, distribution of velocities along the axis of the ejected jet and along the axis of the pipeline were obtained. The ability to evaluate the parameters of free jet flow of natural gas (methane) from a damaged pipeline: the total flow rate, total pressure and flow rate at the rupture point is relevant in solving applied environmental safety problems of gas transportation facilities.

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Crude Oil Leakage Detection Based on DA‐SR Framework

Gong

Gao

Yuan

et al. 2022

Advcd Theory and Sims

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Crude oil leakage is a security issue that needs to be avoided in many production areas such as oil fields and substations. However, crude oil leakage image data is often difficult to obtain due to security and privacy issues in the working area. And shadow interference is also a challenge for oil leakage detection tasks. This paper proposes a crude oil leakage detection method based on the DA‐SR framework. The framework consists of two parts: the data augmentation module and shadow removal module. High‐quality synthetic oil leakage images are generated using the cycle‐consistent adversarial networks (CycleGAN), and further process the synthetic images by a T‐CutMix sample processing method. To solve the problem of shadow interference, this paper uses the FlocalLoss function to calculate the confidence loss based on the YOLOv4 detection network and a hard sample retraining (HSR) algorithm to enhance the images with shadows. The experiments demonstrate that the combination of original and synthetic images when training the model can improve the performance of oil leakage detection. Finally, it is also shown that the detector built from the framework can effectively reduce the false detection of shadows.

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Simulation and assessment of underwater gas release and dispersion from subsea gas pipelines leak

Cited by 81 publications

References 25 publications

Major CO₂ blowouts from offshore wells are strongly attenuated in water deeper than 50 m

Major CO₂ blowouts from offshore wells are strongly attenuated in water deeper than 50 m

Damage areas during emergency depressurization of a gas pipeline

Crude Oil Leakage Detection Based on DA‐SR Framework

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Simulation and assessment of underwater gas release and dispersion from subsea gas pipelines leak

Cited by 81 publications

References 25 publications

Major CO2 blowouts from offshore wells are strongly attenuated in water deeper than 50 m

Major CO2 blowouts from offshore wells are strongly attenuated in water deeper than 50 m

Damage areas during emergency depressurization of a gas pipeline

Crude Oil Leakage Detection Based on DA‐SR Framework

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Product

Resources

About

Major CO₂ blowouts from offshore wells are strongly attenuated in water deeper than 50 m

Major CO₂ blowouts from offshore wells are strongly attenuated in water deeper than 50 m