Hydrate plug formation risk with varying watercut and inhibitor concentrations

摘要: Abstract Hydrate formation introduces a potential operating and safety hazard in subsea oil gas pipelines. The aggregation deposition of hydrate particles together increase the resistance-to-flow pipeline, which dissipates energy available to transport resource may even lead plug that blocks flow completely. effects 20–100% watercut thermodynamic kinetic inhibitors on both growth rate have been studied high-pressure autoclave apparatus. highest was observed for systems with around 60% watercut, oil-continuous condition existed majority period free water bind aggregates deposits. Severe periodic local maxima torque required maintain constant rotational speed were repeatedly at watercut; these could be partially suppressed by adding 10 wt% MEG phase. signal fully two system configurations: (i) 0.5 wt% PVCap, inhibitor; (ii) 30 wt% MEG. results suggest injection inhibitor less than 25% full inhibition requirement sufficient alleviate risk blockage. A simple model describe water- successfully deployed predict varying without inhibitor.