During the formation of oil-gas and migration process, some soluble trace elements in the sedimentary organic matter will be separated and dissolved in the associatedwater.
沉积有机质在生成油气及运移的过程中,部分可溶微量元素会分离出来,溶解在伴生的水中。
2
Prior to the mid-1980's, methane from coal seams was classified as an uneconomic resource - one of vast potential, but low value due to poor recovery rates and high associatedwater production.