Natural gasoline production has been soaring, jumping from an average of 670 Mb/d in 2022 to 800 Mb/d in Q4 2023 (see left graph below). The heaviest of the natural gas liquids, natural gasoline, a.k.a., plant condensate or C5-plus, is used primarily as a motor gasoline blend component and is exported to Canada as a diluent to make heavy Canadian crude flow in pipelines.
There’s been a big mystery surrounding natural gasoline. More than one-third of it seemed to disappear. Since the mid-2010s, EIA’s “product supplied” category – a plug number used to force a balance between supply/demand - had been increasing dramatically from 95 Mb/d in 2015 to 260 Mb/d in 2022. In other words, natural gasoline was disappearing into some unidentified “black hole” not tracked by EIA.
The mystery was finally solved by EIA as they were trying to figure out a problem with their crude oil statistics. Crude oil had the opposite problem of natural gasoline – There was not enough of it. Demand consistently exceeded supply. The “unaccounted for” plug factor in the crude oil supply/demand balance had been growing much higher in recent years. So much so that market observers were questioning the credibility of EIA’s numbers. That prompted a market study that was completed in late 2022.
One of the most significant conclusions? In effect, the natural gasoline was disappearing into crude oil. Sometimes literally by blending. But most of the time it is simply due to reporting misclassification. For example, natural gasoline exported from the Gulf Coast coded on export forms as crude oil.
Natural gasoline is not the only petroleum product that has had this classification problem, but the problem with natural gasoline is by far the largest.