The main thing that's happening is that expectations of where you'd expect oil to be produced are conditioned strongly on the price of extraction. So, for instance, the oil sands in Canada contain vast amounts of petroleum, and this has been known for a very long time, but extracting it is difficult and expensive. For decades it was more profitable to explore and exploit more accessible deposits. The main conclusion to draw from renewed interest in well-known but less commercially accessible petroleum deposits is that we're running out of the stuff that's easy to extract, not that there's a previously-ignored geological mechanism of oil production.
From my brief Google research just now, it appears there's generally acceptance of the notion that some petroleum deposits have abiogenic origins, with some specific, generally very small deposits thought not to be true "fossil" fuels. But even a geologic process of creating oil will proceed on a timescale far slower than our present consumption rates, so from a resource scarcity perspective the question of the precise origin is moot - if you slurp it up much faster than it can be produced, you're on a trajectory to run out.
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