Reduced Methanol Contamination
in produced oil and gas condensate
Methanol contamination is a problem for oil and gas producers. Methanol is typically used during well shut-ins to avert the risk of gas hydrate formation. On asset restarts, some methanol is carried over into the export transportation systems which affects the quality and value of the oil and gas condensate produced. Methanol contamination can also result in charges and penalties being imposed by pipeline operators and oil and gas refineries, who have to incur costs to remove the methanol from their systems.
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How We Solve It
We measure the methanol contamination in oil or gas condensate by analysing the chemical composition of the produced water. This shows how much methanol is present and also what percentage of the methanol injected has been taken up by the water. This latter measure enables operators to calculate how much a given quantity of methanol used will reside in the oil or gas condensate as a contaminant, which is useful for planning purposes or requests for methanol waivers. It can also be used to optimise the methanol requirements during asset start-ups and restarts.
We use our HydraCHEK® device to monitor the chemical composition of produced water from the first-stage separator. This shows how much methanol is present in the water and therefore how much remains in the oil or gas condensate produced.
This enables the operator to manage methanol contamination levels so that oil and gas condensate cargoes are kept within acceptable quality levels and achieve higher per barrel prices. This also enables operators to have conversations with pipeline operators about potential methanol contamination, which are based on fact rather theoretical calculations.