Don’t the unwanted products create problems for well pumping units and compressers that have been running on wellhead gas for years?
A low speed reciprocating engine engine can handle a lot of undesirables comparatively easy to some of the proposed processes or high-speed microturbine.
You can buy a engine that will run on straight crude oil (if it is light enough). We evaluated some of these for a remote facility needing a 30 MW power plant. In the end it was cheaper to build a basic topping plant, make our own diesel and have more efficient engines.