Many things could be cause:
The OTC data often will lag several months compared to your operator or purchaser revenue statements.
The products go to different markets. We see different compaines take the responsibility of the reporting. The oil purchaser, the oil transporter, the gas mid stream partner, the well operator, plant products purchaser, etc. It depends on the operator, and in many cases a operator may report differently based on location. In some cases, the operation may schedule one transportation company for several months because of the massive initial volume. The move to another market or transport company. These reports may be delivered in different ways at different times. Because of that, a months reported production of various products may show up at various times.
The OTC (or the report submitted) May have made a mistake when entering the data. It is not uncommon to see corrections.
“Just a gas well”
Gas well is a classification of a greater than 15,000:1 gas to oil ratio. That may be what they are referring to. But often we see the “gas” wells produce oil.
The operator may even be referring to a gas well that produces large volumes of condensate which is sold as oil.