Combining self-lift and gas-lift: A new approach to slug mitigation in deepwater pipeline-riser systems

Okereke, Ndubuisi Uchechukwu; Omotara, Oluwagbenga Olawale

doi:10.1016/j.petrol.2018.04.064

Cited by 9 publications

(1 citation statement)

References 4 publications

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“…It is a relatively new concept in the oil and gas industry and is currently gaining huge attention. Key flow assurance issues include: severe slugging prediction and mitigation in deepwater scenarios (Okereke and Omotara 2018;Io et al 2017), wax formation (Minami et al 1999) and hydrates formation and mitigation in deepwater scenarios (Wang et al 2018).…”

Section: Literature Reviewmentioning

confidence: 99%

An assessment of hydrates inhibition in deepwater production systems using low-dosage hydrate inhibitor and monoethylene glycol

Okereke

Edet

Baba

et al. 2019

J Petrol Explor Prod Technol

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In this study, a deepwater pipeline-riser system that experienced hydrates was modelled in MAXIMUS 6.20 (an integrated production modelling tool) to understand, predict and mitigate hydrates formation in typical deepwater system. Highlights of the results from this study suggest that the injection of low-dosage hydrate inhibitors (LDHIs) into the hydrate-forming structures within the multiphase flow stream disperses the hydrates particles in an irregular manner and subsequently decreases the nucleation rate of the hydrate and prevents the formation of hydrates. This study found that the cost of using monoethylene glycol was significantly higher than that of LDHI by over $500/day although low-dosage hydrate inhibitors have initial relatively high CAPEX. In the long run, its OPEX is relatively low, making it cost-effective for hydrate inhibition in deepwater scenarios.

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