noun
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.
油田では、原油とともに随伴水が大量に産出される。
At oil fields, large amounts of produced water are brought to the surface together with crude oil.
随伴水の処理は、環境保護の観点から重要である。
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.