... Abstract Thermal Insight, visualized in Figure 1 , establishes a new frontier for operators to increase reliability and uptime of SPS systems by avoiding cold restarts. The Digital Twin is a live diagnosis tool that provides critical information about the actual cool down time of critical...

.... Transient operations, involving shut-in and restart is the most challenging scenario with risk for hydrate problem. The residence time of the production fluids associated to the rate of heat loss to the ambient seabed during the period of shut-in may increase the potential risk of hydrate blockage...

... has focused on continuous "steady-state" operations and a gap exists for the more complicated, yet interesting transient shut-in/restart scenarios. Motivation to study such systems are further exacerbated given that industrial fields can operate outside the gas hydrate formation region during...

... with Anti-Agglomerant Injection in a Subsea Tieback . Offshore Technology Conference . blockage hydrate hydrate blockage flow assurance deposit shutdown fraction modeling & simulation flowline depressurized restart likelihood depressurization restart hydrate equilibrium region high...

... rheometer viscosity offshore technology conference drilling fluids and materials drilling fluid management & disposal emulsion replicate assessment composition oilfield chemistry torque response upstream oil & gas evaluation ldhi effectiveness protocol restart autoclave hydrate...

... Subsea oil and gas flowlines can provide favorable conditions for gas hydrate formation, which can lead to flow assurance issues as hydrate particles agglomerate and accumulate in the flowline. Shut-in and restart operations are particularly critical for hydrate plug formation. Traditional...

... The presence of gas hydrates in subsea production is identified as a major flow assurance challenge due to the rapid formation of hydrates and their risk of causing flowline blockages. The risk of hydrate-associated blockages could be higher for transient (shut-in/restart) operations compared...

... operation cooldown time flexible flowline subsea system production chemistry paraffin remediation reservoir temperature restart flowrate wax inhibition spur line OTC-27916-MS A Novel Hydrate Strategy in a High Risk Hydrate Environment for a Fast Track Tie-in GoM Development Oscar Uribe...

... flow assurance in subsea systems simulation scenario restart sub-sea flow assurance procedure upstream oil & gas production shutdown vendor deployment fam modeling & simulation availability online transient simulation operation team accuracy offshore technology conference...

... constant suction pressure during the well production ramp-up. Modeling Approach The transient cases were selected to capture the ranges of reservoir boundary conditions and production fluid properties expected and the types of start-up operations (i.e. cold or warm restart) for which the pump and recycle...

... as complex and difficult to use, the main focus of the paper is to present an example of generation of "best practices" that can address the needs of a general flow assurance community, using a gas hydrate model developed for oil-dominated systems. The example illustrates the restart of an offshore well...

... results, TOG data for long periods of time, toxicity/environmental testing data and shut-in/restart history. A major benefit of this new chemistry is that the produced water quality is improved compared to the first generation chemistry in field applications. The oil-soluble nature of the new chemistry...

... oildominated operations. This new situation forced the industry to imagine new prevention alternatives. Self-inhibition based on natural surfactants has been investigated and fieldobserved. More recently, experiments have demonstrated the capabilities of appropriate flow conditions to restart operations...

... conference otc 16529 dual flowline remediation of hydrates upstream oil & gas wax inhibition scale inhibition hydrate remediation insulation hydrate risk intervention inhibitor wax remediation paraffin remediation production chemistry glider development restart hydrate inhibition...

..., controlling pressure, removing water, and shifting thermodynamic equilibrium with chemical inhibitors such as methanol or mono-ethylene glycol. remediation hydrate blockage flowline circulation production chemistry depressurization cooldown time restart upstream oil & gas insulation...

.... And it is the operating envelope that we use to describe these operational limitations. This paper addresses the operating envelope of a 90-km deepwater tieback in terms of well operations, turndown, ramp-up, shutdown, and restart. Transient multiphase hydraulic models were used to simulate these operations and to help...

... difficult. convection formation condition otc 14011 riser equation restart complex geometric configuration thermal performance natural convection upstream oil & gas golczynski hydrate formation condition cooldown time thermal behavior flow assurance conduction heat transfer...

... to very low shear rates which may be difficult to measure. Having an estimate of the viscosity at low shear and low temperatures will aid in determining flow restart requirements and will be discussed later in this report. The break in the log viscosity versus temperature plot can be used to identify...

... may become blocked. One well-known method of alleviating the problem is to treat the crude oil with wax crystal modifiers but it is difficult to predict the restartability behaviour of waxy crude oil after a pipeline shutdown. This is because the crystal-lization of wax into interlocking structures...