How are fossil fuels extracted?
Fossil fuels are the remnants of dead organisms, both plant and animal, there are many different types; 1, Coals 2, Oils 3, Gas 4, Tar Sands 5, Oil shales Coals are the remains of plants, they form in several different ways often from peat or wood, they are H+ poor and are extracted either from deep mines (historically) or using open cast mining. If you take a coal down to depths of approximately 4-5km the temperature will be up to 100C and the coal will begin to give off Gas, it may also produce small amounts of oil earlier on (H ratio is generally too low for much oil production) Gas is produced from sub surface accumulations by drilling, you can have “wet” or “dry” gas depending on the ratio of condensate Gas production is often coupled with oil production as many oil reservoirs have a gas cap and vice versa. If you leave oil lying around to long it can become biodegraded, or lighter fractions can be removed by physical processes and the remaining heavy molecules in their sandstone
