produced water; oilfield brine; formation water
Technical term in oil and gas extraction: water that comes to the surface along with crude oil or natural gas. Often contains dissolved minerals and hydrocarbons.
At oil fields, large amounts of produced water are brought to the surface together with crude oil.
Treatment of produced water is important from an environmental protection standpoint.
原油 is crude oil; 随伴水 is the water that accompanies it during extraction.
Compound of 随伴 (accompanying) and 水 (water), literally 'accompanying water'. The exact historical derivation is uncertain; the term is a modern technical coinage for the oil industry.