I've done a study more recently on the definitions used for subsidies for calculating the kinds of numbers that you refer to. I would need to see more detail. The input-output tables use one type of definition, but other times people group in ordinary tax writeoffs and things like that.
As a general matter though, I don't support subsidies for oil and gas. I know the federal government put a lot of money into subsidizing the Hibernia oil platform, and I believe it continues to plan to support that platform. What you want is a neutral playing field for all the energy sectors.
The costs of reducing greenhouse gas emissions, we don't calculate them by looking at subsidies to sectors. They are calculated using economic modelling strategies that look at who bears the cost throughout society, including the increased price of energy that propagates throughout the entire economy.