Crude Oil is Trading at a 12-Year High Against Natural Gas

When drilling for oil (or for natural gas), quite often, the hydrocarbon you're not drilling for comes out of the ground along with the hydrocarbon you are drilling for. Natural gas coming out of the ground along with oil (in an oil play) is called "associated gas." And in the Marcellus/Utica, other hydrocarbons (aside from methane) come out too, including ethane, propane, butane, and isobutane --- called natural gas liquids (NGLs). Production of oil and NGLs are measured in barrels (Bbl), while methane is measured in thousand cubic feet (Mcf) or million Btus (MMBtu). Years ago, the oil and gas industry created a way to evaluate the total output for a given well or wells by converting all of the hydrocarbons into one unit, called barrels of oil equivalent (Boe). Not long after that came a comparison of how much each commodity sells for on an equivalent basis.

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