Characterizing methane hydrate formation in the non-Newtonian fluid flowing system

Fu, Weiqi; Wang, Zhiyuan; Duan, Wenguang; Zhang, Zhennan; Zhang, Jianbo; Sun, Baojiang

doi:10.1016/j.fuel.2019.05.052

Cited by 39 publications

(29 citation statements)

References 46 publications

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“…Besides, their models do not consider the effects of the drilling mud additives on hydrate formation. In essence, the recent studies showed that the drilling mud additives has a significant influence on hydrate formation in water‐based mud . However, this work is not the focus of the paper, which should be recommended in the future work.…”

Section: Introductionmentioning

confidence: 99%

“…In essence, the recent studies showed that the drilling mud additives has a significant influence on hydrate formation in water-based mud. 30,31 However, this work is not the focus of the paper, which should be recommended in the future work. The main focus of this research is to develop the coupled multiphase flow modeling of a wellbore unsteady flow and a formation seepage with the consideration of the hydrate phase transition.…”

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confidence: 99%

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Multiphase flow behavior in deep water drilling: The influence of gas hydrate

Jiang

et al. 2020

Energy Science & Engineering

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Hydrate phase transition may bring hidden dangers for well control safety, even accidents of blowout happen in deep water drilling. Accurate calculation of all the drilling parameters is of great importance for well control safety. In this study, the mathematic models of transient heat transfer and multiphase flow have been established with the consideration of hydrate phase transition. Furthermore, the position where hydrate formation is most likely to occur was predicted with the proposed models, and the factors affecting hydrate formation region were also analyzed. Finally, the analysis of the effect of gas hydrate phase transition on some important parameters in well control, such as the pit gain, gas void fraction, and bottom hole pressure, is presented. The results show that hydrates form near the mud line during the drilling and shut‐in stage, but the hydrate formation region will be narrowed as well killing start. Additionally, the hydrate formation region decreased with the increase of flow rate and increased with the increasing shut‐in time, hydrate inhibitors, and riser insulation are presented to prevent hydrate blockage. More importantly, the gas void fraction and pit gain decrease due to the formation of hydrates, leading to the gas kick early detection not timely and gas kick more “hidden.”

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Section: Introductionmentioning

confidence: 99%

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confidence: 99%

Multiphase flow behavior in deep water drilling: The influence of gas hydrate

Jiang

et al. 2020

Energy Science & Engineering

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“…Generally related to the decomposition of gas hydrate [2] or the upward migration of gas and oil beneath the seafloor along geologically weak zones, cold seeps are widely distributed around the world and play an indicative role in the exploration of deep-water oil and gas resources [3]. Furthermore, gas hydrate is a significant gas source at cold seeps, and the cold seep fluid flow velocity can also affect the hydrate formation rate [4,5]. Cold seeps are among the most effective indicators in explorations for gas hydrate in the ocean [3].…”

Section: Introductionmentioning

confidence: 99%

Hydrochemical Characteristics and Evolution Mode of Cold Seeps in the Qiongdongnan Basin, South China Sea

et al. 2020

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Submarine cold seeps have recently attracted significant attention and are among the most effective indicators of gas hydrate in the oceans. In this study, remotely operated vehicle (ROV) observations, seismic profiles, core sediments, bottom seawater, and fluid vented from cold seeps in the deep-water Qiongdongnan Basin were used to investigate the origin and evolution of cold seeps and their relationships with gas hydrate. At stations A, B, and C, inactive cold seeps with dead clams, cold seep leakage with live clams, and active cold seeps with a rich mussel presence, respectively, were observed. The salinity and Na+ and Cl- concentrations of the cold seeps were different from those of typical seawater owing to gas hydrate formation and decomposition and fluid originating from various depths. The main ion concentrations of the bottom seawater at stations B and C were higher than those at station A, indicating the substantial effects of low-salinity cold seep fluids from gas hydrate decomposition. The Na+-Cl-, K+-Cl-, Mg2+-Cl-, and Ca2+-Cl- diagrams and rare earth element distribution curves of the water samples were strongly affected by seawater. The concentrations of trace elements and their ratios to Cl- in the bottom seawater were high at the stations with cold seeps, suggesting the mixing of other fluids rich in those elements. Biochemical reactions may also have caused the chemical anomalies. Samples of HM-ROV-1 indicated a greater effect of upward cold seep fluids with higher B/Cl-, Sr/Cl-, and Ba/Cl- values. Moreover, the Re/Cl- value varied between fluid vents, possibly due to differences in Re precipitation strength. Differences in cold seep intensity are also believed to occur between areas. The cold seep fluxes changed from large to small before finally disappearing, showing a close connection with gas hydrate formation and decomposition, and influenced the local topography and ecosystems.

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“…[3][4][5][6] MEG is also used to prevent the formation of gas hydrates during the offshore oil and gas deep water drilling. 4,[7][8][9] Significant volumes of MEG are used annually in different gas fields to inhibit hydrate formation in the pipelines. After delivering the gas safely to the processing plant, these volumes require an effective separation and disposal process.…”

Section: Introductionmentioning

confidence: 99%

“…Monoethylene glycol (MEG) is used in different gas fields as the primary HI due to its high efficiency in preventing hydrate formation compared to other chemicals 3-6 . MEG is also used to prevent the formation of gas hydrates during the offshore oil and gas deep water drilling 4,7-9 . Significant volumes of MEG are used annually in different gas fields to inhibit hydrate formation in the pipelines.…”

Section: Introductionmentioning

confidence: 99%

A systematic approach for design and simulation of monoethylene glycol (MEG) recovery in oil and gas industry

et al. 2020

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Monoethylene glycol (MEG) is a widely used hydrate inhibitor in the oil and gas industry to reduce the risk of hydrate formation in pipelines that could cause a blockage. For flow assurance and hydrate inhibition purposes, large volumes of MEG are required to control the hydrate formation conditions in pipelines. Disposal of rich MEG after separation has considerable costs and poses significant environmental concerns. Therefore, the development of an effective process for MEG recovery has been gaining importance. The current study presents a systematic approach to develop, simulate, and optimize MEG recovery using Aspen Plus and ELEC-NRTL thermodynamic package. Two distinct MEG recovery process (MEG-R-P) designs, namely, the vacuum (design I) and atmospheric (design II) distillation, were tested. Both designs have demonstrated exceptional performance in recovering MEG from salts and water and producing lean MEG at a purity of 90 wt%. Design I operating at vacuum conditions outweighs design II in terms of MEG purity and energy requirements. The addition of MEG-R-P has the advantage of recovering and reusing significant amounts of MEG and removing the burden on the environment.

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Characterizing methane hydrate formation in the non-Newtonian fluid flowing system

Cited by 39 publications

References 46 publications

Multiphase flow behavior in deep water drilling: The influence of gas hydrate

Multiphase flow behavior in deep water drilling: The influence of gas hydrate

Hydrochemical Characteristics and Evolution Mode of Cold Seeps in the Qiongdongnan Basin, South China Sea

A systematic approach for design and simulation of monoethylene glycol (MEG) recovery in oil and gas industry

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