Hate to break it to you but fossil fuels comes from acient plant and microbial material, not dinosaurs. Coal comes from the Carboniferous period from massive land plants that accumulated in oxygen-poor water. Oil and natural gas mainly comes from plankton, algae, and bacteria that settled on the ocean floor and mixed with sediment.

Dinosaurs contributed an infinitesimal fraction of the biomass that is needed for the fossil fuel reserves.