Effect of wax crystal on the kinetic and morphology of gas hydrate deposition in water-in-oil emulsions

Liu, Zhiming; Geng, Xin; Gao, Yan; Yao, Haiyuan; Chen, Haihong; Li, Zhigang; Song, Guangchun; Wang, Wuchang; Li, Yuxing

doi:10.1016/j.fuel.2022.125501

Cited by 11 publications

(3 citation statements)

References 58 publications

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“…Therefore, hydrate prevention and control is a key issue in the flow assurance of oil and gas exploitation. 7 The economic and safety issues caused by pipeline blockage have prompted scholars to explore how to reduce the accumulation of hydrates during pipeline operation. The risk management strategy of injecting low-dose hydrate inhibitors (LDHIs) is considered a key measure to solve the problem of hydrate blockage in pipelines due to its advantages such as economic benefits and flexible operation.…”

Section: Introductionmentioning

confidence: 99%

“…With the soaring global energy demand and the continuous development of land and shallow sea resources, deep-sea energy is considered to be the strategic inheritance area of global energy development in the 21st century. , The extraction of deep-sea oil and gas resources generally faces harsh conditions such as high pressure and low temperature, which leads to the precipitation of hydrates , and waxes , during the extraction and transportation process of oil and gas, causing pipeline blockage, production interruption, and other accidents, leading to serious economic problems. Therefore, hydrate prevention and control is a key issue in the flow assurance of oil and gas exploitation . The economic and safety issues caused by pipeline blockage have prompted scholars to explore how to reduce the accumulation of hydrates during pipeline operation.…”

Section: Introductionmentioning

confidence: 99%

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Study of Hydrate Particle Morphology and Cohesive Force in the Presence of Wax and Glycine

Zhou,

Ren,

et al. 2024

Energy Fuels

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During the operation of deep-sea pipelines, the accumulation and deposition of hydrates are important reasons for pipeline blockage. The current main measure to solve the hydrate plugging problem is the addition of low-dose inhibitors (LDHIs), but it is not yet known whether the precipitation of wax crystals will affect their effectiveness. Therefore, in this study, the hydrate cohesive force within the wax-free/wax-containing system was directly measured by using a micromechanical force device (MMF) and the reasons for the change in cohesive force were analyzed from a morphological point of view. The results showed that glycine was effective in reducing the cohesion between hydrate particles in both wax-free/wax-containing systems and still exerted the effect of antiagglomeration agent (AA) at very low concentrations (as low as 0.10 wt %). Moreover, the optimum concentration of glycine was 0.50 wt %. At this concentration, the cohesive force decreased from 8.54 to 7.07 mN/m in the wax-free system, a decrease of about 17.2%, while the cohesive force decreased from 5.94 to 2.15 mN/m in the wax-containing system, a decrease of about 63.8%. By observation of the morphology of the hydrate particles, the presence of glycine was found to reduce the volume of the liquid bridge by changing the surface roughness and wettability of the particles, thereby reducing the cohesive force. And when wax was contained in the system, the wax further reduced the wettability by adsorbing on the surface of the hydrate particles. However, under certain AA conditions, the increase in wax concentration (from 0.1 to 0.3 wt %) resulted in the free water inside the hydrate being more likely to form liquid bridges with the surrounding particles, thus weakening the effect of AA. This work analyzes the effect on cohesive force in the simultaneous presence of LDHIs and wax from a morphological point of view, which is beneficial in providing more insights into securing safe hydrate flow management.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Study of Hydrate Particle Morphology and Cohesive Force in the Presence of Wax and Glycine

Zhou,

Ren,

et al. 2024

Energy Fuels

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“…One of the significant flow assurance problems in petroleum production systems is wax deposition in the pipeline. Wax accumulation can obstruct the passage of petroleum oil through a conduit, resulting in uncommon pressure conditions and a manufactured obstruction that reduces or stops production [1,2]. The problem comes when the temperature of the crude oil falls below the wax appearance temperature, causing crystallization in the crude oil [3].…”

Section: Introductionmentioning

confidence: 99%

Investigating the Effect of Okra Mucilage on Waxy Oil Flow in Pipeline

Aliyu Adebayo Sulaimon,

Muhammad Zaid Sannang,

Masooma Nazar

et al. 2023

ARFMTS

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Wax deposition in the pipeline is one of the petroleum production system's most serious flow assurance issues. Wax deposition limits crude oil flow through the pipeline, resulting in unusual pressure conditions and an artificial barrier that reduces or stops production. This study discusses the effect of okra mucilage on preventing wax deposition in the waxy pipeline. Fourier Transform Infrared (FTIR) and X-ray diffraction analysis (XRD) analysis were done to characterize the okra mucilage as a wax inhibitor. An experimental flow loop system was fabricated to study the wax inhibition potential of okra mucilage. The wax deposition thickness was measured using the pressure drop method. After the experimental completion, the effectiveness was calculated. The FTIR result showed that sugar components (galactose, rhamnose, and galacturonic acid) found in the okra were the reason that made the okra slimy and slippery. This characteristic reduces the surface roughness, reducing wax deposition in the pipeline. Based on the result of the experiment, it was shown that using the diluted okra powder as wax inhibition is more effective than using okra mucilage. The correlated effectiveness of the result using diluted okra powder was approximately 10% more effective than using okra mucilage. Diluted okra powder gives 40.79% effectiveness; compared to okra mucilage, which was 30.75%. These results indicate that the diluted okra powder is a cost-efficient plant-based substitute inhibitor against wax inhibition in oil flow pipes and has good wax inhibition capabilities.

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Investigation on the mechanism of heating effect influencing emulsifying ability of crude oil: Experimental and molecular dynamics simulation

et al. 2023

Colloids and Surfaces A: Physicochemical and Engineering Aspect

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Effect of wax crystal on the kinetic and morphology of gas hydrate deposition in water-in-oil emulsions

Cited by 11 publications

References 58 publications

Study of Hydrate Particle Morphology and Cohesive Force in the Presence of Wax and Glycine

Study of Hydrate Particle Morphology and Cohesive Force in the Presence of Wax and Glycine

Investigating the Effect of Okra Mucilage on Waxy Oil Flow in Pipeline

Investigation on the mechanism of heating effect influencing emulsifying ability of crude oil: Experimental and molecular dynamics simulation

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