NGL prices reached a three-year high last week, propelled by sharp rises from propane and natural gasoline.

The hypothetical NGL barrel at Mont Belvieu, Texas, recorded a spread of $5.50 as the price of natural gas slipped by 3.2% at the Houston Ship Channel and the barrel climbed to just shy of $33. The barrel’s margin grew by almost 10%, led by a 24.1% expansion in the margin for ethane.

Propane rose 7.3% at Mont Belvieu and 6.4% at the Conway, Kan., hub with En*Vantage Inc. determining “there is a real potential of breaking $1 per gallon [gal] by early November.” Margins widened by 11.7% at Mont Belvieu and 7.9% at Conway.