Flow Assurance in Multiphase Environments

Forsdyke, Ivor N.

doi:10.2523/37237-ms

Cited by 6 publications

(5 citation statements)

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“…Flow assurance design and operation become challenging in deep water due to a combination of low temperatures, high internal hydrostaic pressures and economic drivers for long offsets and high availability. 1,2,3,4 Relative to hydrates, paraffins and operating practice, the solutions for gas and oil systems tend to be different.…”

Section: Introductionmentioning

confidence: 99%

Impact of Electrically-Heated Systems on The Operation of Deep Water Subsea Oil Flowlines

Pattee

Kopp

2000

All Days

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Electrically-heated flowlines offer a fundamentally different and simpler approach to managing hydrates in deep water subsea oil flowlines, when compared with conventional solutions. Current operating and design strategies used to manage hydrates are compared with strategies that could be adopted in fields having electrically-heated flowlines. The paper also identifies additional opportunities to handle other flow assurance challenges.

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Section: Introductionmentioning

confidence: 99%

Impact of Electrically-Heated Systems on The Operation of Deep Water Subsea Oil Flowlines

Pattee

Kopp

2000

All Days

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“…Multiphase flow studies have focused on oil–water or gas–liquid two phases in horizontal sections, with less research on vertical tube flow. Forsdyke 24 believes that the study of multiphase flow wax deposition should follow the experimental method of single-phase flow wax deposition, considering the influence of the flow state on the thickness of wax deposition under different flow patterns. Matzain et al 25 and Nilufer 26 conducted a loop experiment on the relationship between two-phase gas–liquid flow wax deposition and flow pattern and obtained a similar conclusion—the upper wax deposition of the pipeline under the intermittent flow type is thicker and softer.…”

Section: Introductionmentioning

confidence: 99%

Wax Deposition Law under a Gas–Liquid Bubbly Flow Pattern

Gao

Cai

et al. 2021

ACS Omega

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Under the high-pressure and low-temperature environment of the deep sea, wax deposition will occur in the wellbore. This study discusses the effect of gas–liquid two-phase bubbly flow on wax deposition. In this study, wax deposition experiments of a gas–liquid two-phase flow in vertical pipelines were carried out using waxy white oil and air as the experimental medium. The results show that under the bubble flow pattern, within a short period of time from the start of wax deposition, it rapidly accumulates to the peak, then rapidly cuts off part of it, and then presents a simple harmonic dynamic trend until the final stability. The average wax-deposit thickness decreases first and then increases with the increase of superficial gas velocity, and it increases first and then decreases with the increase of superficial liquid velocity. The average wax-deposit thickness decreases with the increase of oil temperature. The average wax-deposit thickness was substantially constant and then decreases with the increase of ambient temperature. The wax-deposit thickness increases with the increase of wax content in oil flow. This research is useful for people to further understand the changes in the wax deposition process.

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“…But, the study of their relative position/boundaries within pressure temperature (P-T) diagrams as well as the rate of wax deposition and accumulation is also essential. The major factors include oil composition, temperature/cooling rate, pressure, paraffin concentration, molecular mass of paraffin molecules, paraffin molecular weight distribution, occurrence of nucleating materials such as asphaltene, formation fines and corrosion products, water oil ratio, and shear environment (Coutinho, Edmonds, Moorwood, Szczepanski, and Zhang, 2002;Forsdyke, 1996;Pedersen, 1995;Hammami, 1994;Hammami, 1997;Monger McClure, Tackett, and Merrill, 1999;Pan, Firoozabadi, and Fotiand, 1997;Vazquez and Mansoori, 2000).…”

Section: Introductionmentioning

confidence: 99%

Studies of Wax Deposition Onset in the Case of Indian Crude Oil

Khan

Mahto

Fazal

et al. 2008

Petroleum Science and Technology

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Before taking any decision regarding strategies for prevention and remediation of wax deposition problems in the production tubing, pipeline, and process equipment, it is essential to identify the conditions of wax deposition and to predict wax deposition rates. In this article a study on the prediction of wax deposition, different factors affecting the deposition, and the practical applications of laboratory results obtained for characterization of the Indian crude oils have been presented. The waxy crude characterization study was performed on both stock tank crude oil and recombined integrated crude oil. The results of it exemplify the influence of composition, temperature, and pressure on the solid behavior of Indian paraffinic crudes.

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Flow Assurance in Multiphase Environments

Cited by 6 publications

References 0 publications

Impact of Electrically-Heated Systems on The Operation of Deep Water Subsea Oil Flowlines

Impact of Electrically-Heated Systems on The Operation of Deep Water Subsea Oil Flowlines

Wax Deposition Law under a Gas–Liquid Bubbly Flow Pattern

Studies of Wax Deposition Onset in the Case of Indian Crude Oil

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