Reduce Hydrate Risk

(in Transient Phases)

Problem Definition

Gas hydrates are one of the major flow assurance challenges for the industry and are expected wherever gas meets water at high pressure and low temperature. This is also a problem for oil producers (especially those using gas lift), who have a risk of hydrates forming at the well-head when wells are shut in and therefore cold. Operators address this by injecting chemical inhibitor ‘pills’ at the well-head during shut-in and for a period after start-up to avoid hydrates forming. The right amount of chemical inhibitor required to prevent hydrates forming during shut-in is not easy to calculate, and so operators may face a residual risk of blockages or conversely be injecting too much inhibitor and so unnecessarily contaminating hydrocarbons produced.

“It is a challenge that it takes 30 minutes to get the MEG back up at restart. There is currently a discussion about whether we should base our treatment volumes on a cost-benefit analysis or on our current extremely conservative approach”.—Major Operator, Australasia

“A more scientifically-based approach towards continuous improvement and validation. Cost savings associated with adopting a risk-based approach (resulting in very highly controlled risk). Ultimately the benefit of this technology translates into quality of hydrocarbon product (with regard to contamination in particular), which plays a big part in hydrocarbon accounting”.

—Independent Consultant, Global

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How We Solve It

We look at prevailing well conditions to assess the risk of hydrate formation and calculate the right volume of chemical inhibition required to mitigate this risk and the required duration for continued injection post-start.

The Technology


We also use HydraCHEK® to monitor what is happening in the field. It measures the risks of hydrates in real-time, and checks for changes. This allows dosage on shut-in to be adjusted to deal with current expected conditions.


We use HydraFLASH® software to model the hydrate risk and to determine the mitigation strategy/chemical inhibitor dosage that will be required on shut-in.


This can lead to a reduction in chemical inhibitor use of between 20% and 50% or can simply provide assurance that the current dosage method and plan is sufficient and effective.


 +44 (0) 1224 825680

14 Golden Square
   Aberdeen, AB10 1RH


+44 (0) 1224 825680

14 Golden Square, Aberdeen, AB10 1RH

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