The Slow Formation of Oil and Natural Gas Deposits

Updated on 02.29.2024
Middle School
Life and earth sciences

5 min read

It takes millions of years for decaying organic matter to be transformed into hydrocarbons within source rock. As sedimentation occurs, chemical reactions create the carbon and molecules that make up liquid or gaseous hydrocarbons. The hydrocarbons then slowly travel upwards until they are trapped by impermeable rock and form a in a reservoir.