Petroleum | 農藥合法資訊網

2018年10月5日—Petroleum,alsocalledcrudeoil,isafossilfuel.Likecoalandnaturalgas,petroleumwasformedfromtheremainsofancientmarineorganisms, ...

Millions of years ago, algae and plants lived in shallow seas. After dying and sinking to the seafloor, the organic material mixed with other sediments and was buried. Over millions of years under high pressure and high temperature, the remains of these organisms transformed into what we know today as fossil fuels. Coal[1], natural gas[2], and petroleum[3] are all fossil fuels that formed under similar conditions. 

Today, petroleum is found in vast underground reservoirs where ancient seas were located. Petroleum reservoirs can be found beneath land or the ocean floor. Their crude oil[4] is extracted with giant drilling machines. 

Crude oil is usually black or dark brown, but can also be yellowish, reddish, tan, or even greenish. Variations in color indicate the distinct chemical compositions of different supplies of crude oil. Petroleum that has few metals o...