Study of Gas Hydrate Formation and Deposition Mechanisms in Hydrocarbon Systems

Straume, Erlend Oddvin; Kakitani, Celina; Morales, Rigoberto E. M.; Sum, Amadeu K.

doi:10.26678/abcm.encit2016.cit2016-0255

Cited by 5 publications

(4 citation statements)

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“…Erland conducted two thermodynamics studies , using NaCl and MEG for both studies but under different concentrations (3.5 and 6.6 wt %) on CH 4 gas hydrate with the presence of mineral oil 70T, and both studies used different water cuts. The first study was conducted at a 30% water cut and the second study at 60% water cut at the same experimental conditions of 7 MPa pressure and temperature from 13 to −5 °C, where both studies show that the effect of those two different thermodynamics inhibitors has a significant impact on CH 4 hydrate where it helps to shift the equilibrium temperature around 0.6–0.7 °C point.…”

Section: Role Of This In Oil-based Systemsmentioning

confidence: 99%

“…Moreover, the authors reported that inhibited systems have a higher risk of hydrate agglomeration than noninhibited systems under certain conditions. However, both authors Erland , and Jai Krishna used the same thermodynamics inhibitors, but a different system clearly shows that the results of MEG and NaCl have a higher impact on CO 2 systems compared to CH 4 systems. Peng used flow loop on the CH 4 gas hydrate system with the presence of condensate gas and diesel on different water cut ranges from 95 to 75%, and during this study antiagglomerate CAA played the role of the inhibitor with the concentration of 2 wt %; on the other hand, Zhao used 1 wt % antiagglomerate as well but on a brine system with the presence of condensate liquid and crude oil using a rocking cell with almost the same experimental conditions.…”

Section: Role Of This In Oil-based Systemsmentioning

confidence: 99%

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Gas Hydrate in Oil-Dominant Systems: A Review

et al. 2022

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Gas hydrate risks minimization in deepsea hydrocarbon flowlines, especially in high water to oil ratios, and is critical for the oil and gas flow assurance industry. Although there are several reviews on gas hydrate mitigation in gas-dominated systems, limited reviews have been dedicated to the understanding and mechanism of hydrate formation and mitigation in oil-dominated systems. Hence, this review article discusses and summarizes the prior studies on the hydrate formation behavior and mitigation in oil-dominated multiphase systems. The factors (such as oil volume or water cut, bubble point, and hydrate formers) that affect hydrate formation in oil systems are also discussed in detail. Furthermore, insight into the hydrate mitigation and mechanism in oil systems is also presented in this review. Also, a detailed table on the various studied hydrate tests in oil systems, including the experimental methods, inhibitor type, conventions, and testing conditions, is provided in this work. The findings presented in this work are relevant for developing the best solution to manage hydrate formation in oil-dominated systems for the oil and gas industry.

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Section: Role Of This In Oil-based Systemsmentioning

confidence: 99%

Section: Role Of This In Oil-based Systemsmentioning

confidence: 99%

Gas Hydrate in Oil-Dominant Systems: A Review

et al. 2022

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“…This phenomenon can pose significant challenges in the exploitation of gas resources, necessitating the development and implementation of specialized strategies to avoid potential operational difficulties caused by the presence of hydrates. (Sloan, 2010;Straume et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

Mitigating hydrate formation in onshore gas wells: A case study on optimization techniques and prevention

Ješić,

Martinović,

Stančić

et al. 2023

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Gas wells, particularly those situated onshore, play a vital role in the global energy sector by supplying a significant portion of natural gas. However, operational challenges, notably gas hydrate formation, pose substantial issues, leading to complications such as flowline blockages and unexpected well shutdowns. Gas hydrates, crystalline structures resembling ice, form under specific conditions of low temperature and high pressure. This paper explores the complex process of hydrate formation in gas wells, emphasizing the challenges it presents and the need for specialized strategies to address these issues. The primary focus is a case study of an onshore gas well experiencing recurrent hydrate-related problems. Leveraging PipeSim software, a well model is developed, followed by a sensitivity analysis under various operational scenarios. The study investigates mitigation strategies, including choke position adjustments and methanol introduction, crucial for the safe production of oil and gas fields. The significance of this study lies in its aim to optimize well performance and mitigate risks associated with hydrate formation. Findings contribute to existing knowledge and offer practical solutions for industry practitioners and researchers dealing with onshore gas wells. The paper's structure includes a review of related work, details on the experimental setup and results, and concluding remarks. The perennial challenge of hydrate formation in gas wells necessitates a case-specific assessment and individualized approaches. Nodal analysis and well modeling software have become indispensable tools for engineers in developing preventative measures. This paper presents a methodological approach using a specific well as an example, evaluating the effectiveness of three methodologies: downhole choke installation, methanol dosing, and well transfer to a high-pressure separator.

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“…Observa-se que entre as concentrações de 0,2% e 0,5%, e entre 2% e 5% o comportamento de fato ocorreu, isto é, houve uma queda da viscosidade com o aumento da concentração de álcool (Fig. 25) (BEHAR et al, 1994;SINQUIN, PALERMO e PEYSSON, 2004;CAMARGO et al, 2006;HORVAT et al, 2012, STRAUME, et al, 2016RAO et al, 2018;DING et al, 2019). Assim, nos testes executados foi monitorada esta variável para acompanhar sua evolução no tempo (Fig.…”

Section: Testes Preliminaresunclassified

Reologia De Pastas De Hidratos De Tetrahidrofurano

SILVA¹

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AgradecimentosAgradeço inicialmente a Deus e a minha família, pais, esposa, filhos e irmãos por mais essa conquista.Faço um agradecimento em particular ao órgão de fomento à pesquisa CNPq, a PETROBRAS e a PUC -Rio pelo suporte financeiro, sem o qual este trabalho simplesmente não teria sido possível. Agradeço nomeadamente aos Professores Mônica e Paulo Roberto pela paciência, dedicação, ajuda e pelo ânimo durante todo o processo da montagem deste trabalho. A todos os Professores e colegas que me incentivaram em todos os momentos, não me deixando desistir e nem desanimar. Também gostaria de agradecer aos membros do Grupo de Reologia da PUC-Rio pela assistência prestada, em muitos aspectos, especialmente à Priscila, Alexandra, Ricardo, Aline, Carina, Bruno e Alexandre, por me ensinar e apoiar quando eu precisava. Aos colegas Elias, Pedro, Roberta e Eliana. Muito obrigado a todos. PUC-Rio -Certificação Digital Nº 1512306/CA Abstract Silva, Paulo Henrique de Lima; Naccache, Mônica Feijó. Rheology of tetrahydrofuran hydrate pastes. Rio de Janeiro, 2019. 124p. Doctoral Thesis -Department of Mechanical Engineering, Pontifical Catholic University of Rio de Janeiro.This doctoral thesis proposes to study the rheology of water hydrate and tetrahydrofuran slurries (C4H8O -THF) at different conditions. Natural gas hydrates are crystalline solids, analogous to ice, formed by the aggregation of water and gas in a given organized structure. Their concern for the oil and gas industry is due to the potential risk related to the area of flow assurance. Thus, extensive investments are made for the purpose of preventing and evaluating the risk of hydrate formation. In this context, rheology is a significant element, since it allows to detect the formation of hydrates from variations in rheological properties, the most common being: viscosity, viscous and elastic modules. However, two fundamental conditions for the success of this approach are relatively difficult to achieve in the laboratory, the combination of high pressure and low temperature.Initially will be studied hydrate pastes formed at atmospheric pressure, still at temperatures above 0°C. In another moment, the effects of the addition of alcohol in the hydrate pastes will be studied and, finally, the pastes formed at pressures encountered above atmospheric pressure will be analyzed. Rheological tests were performed for different fluid compositions. Transient and steady-state results are reached, showing that rheology is strongly affected by the agglomeration and disaggregation of hydrate crystals occurring simultaneously as hydrates form and the boundary conditions surrounding the experiments.

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Study of Gas Hydrate Formation and Deposition Mechanisms in Hydrocarbon Systems

Cited by 5 publications

References 3 publications

Gas Hydrate in Oil-Dominant Systems: A Review

Gas Hydrate in Oil-Dominant Systems: A Review

Mitigating hydrate formation in onshore gas wells: A case study on optimization techniques and prevention

Reologia De Pastas De Hidratos De Tetrahidrofurano

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