天然气(包括油田伴生气)经过加工,回收乙烷等较重组份(天然气液)以后,有利于管道输送和环保。此外,天然气液还有很高的经济价值。一部分可以用作化工原料,有的直接掺入原油中,从而提高原油的产量和质量。美国的天然气液产量较高,一般作为石油产量的一部分予以公布。1979年,美国的天然气液产量较高,一般作为石 Natural gas (including gas associated with oilfields) is processed to recover heavier components such as ethane (natural gas liquids), which is good for pipeline transportation and environmental protection. In addition, natural gas liquids have high economic value. Some can be used as chemical raw materials, some directly into the crude oil, thereby enhancing the production and quality of crude oil. The United States has a high volume of natural gas liquids and is generally announced as part of its oil production. In 1979, the United States had a higher output of natural gas liquids, generally as a stone