This study evaluated the effect of Mono-Ethylene Glycol (MEG) on hydrate formation conditions in subsea pipelines for a typical gas deepwater field Nigeria, using flow assurance simulator 'PIPESIM'. At turndown, normal and maximum conditions, production rates were 1640, 2460, 3280 sm3/day, respectively. The wellhead temperature varies between 50-55oC, inlet pressure at is 25 bara. outlet topsid...

35 36 New high resolution multibeam data in the Gulf of Bothnia reveal for the first time the 37 subglacial environment of a Bothnian Sea Ice Stream. The geomorphological record suggests 38 that increased meltwater production may have been important in driving rapid retreat of 39 Bothnian Sea ice during deglaciation. Here we apply a well-established one-dimensional 40 flowline model to simulate...

We investigate whether the recent slow-down of Whillans Ice Stream (WIS),West Antarctica, may lead to its complete stoppage in the near future, using a numerical model. Basal resistance to ice-stream motion is represented by a continuous till layer whose strength changes in response to basal melting and freezing.We implement a basal drainage system, which acts to hinder ice-stream stoppage thro...

Abstract Corrosion and erosion are the common pipe-integrity issues that occur when carbon dioxide, hydrogen sulfide sand exist in gas stream at same time. is developed by reaction among iron, while physical damage through flowing sand. When it comes to prediction model which could accommodate both events, complex phenomena related physics, chemistry metallurgy should be put into account. In th...

Glacier surface albedo strongly affects glacier mass balance by controlling the energy budget. As an indicator of equilibrium line altitude (ELA), snowline (SLA) at end melt season can reflect variations in balance. Therefore, it is extremely crucial to investigate changes and SLA for calculating evaluating loss. In this study, from 2011 2021, Muz Taw was derived Landsat images with a spatial r...

The geotechnical design of partially mobile subsea foundations (mudmats) for pipeline/flowline end terminals (PLETs) is presented in this paper. A mudmat represents a fit-for-purpose engineering solution that has significant commercial competitiveness. lies between fully anchored (which designed negligible movements but may be too large, causing installation issues or requiring corner piles to ...

This study proposes a criterion for the safe transportability of gas hydrate slurries in oil-dominant flowlines. Fluids chemistry plays role how particles agglomerate, which occurs time window take to decrease their porosity because crystallization capillary walls or seal water within pores by action chemical additives, completely preventing any outer surface particle and avoiding liquid bridge...