据天然气工业8月24日消息称,2020 年,美国 5 个主要陆上原油产区的伴生溶解天然气(即伴生天然气)年产量自 2016 年以来首次下降,伴生溶解天然气是油井生产的天然气。这五个地区(二叠纪、巴肯、鹰福特、尼奥布拉拉和阿纳达科)的伴生气产量份额同比下降了1.5%,平均占该地区天然气产量的37.7%。在这些地区石油产量下降 9.2% 的情况下,2020 年的伴生气产量平均为 142 亿立方英尺/天(比 2019 年下降 4.1%)。
当天然气在岩层的压力下溶解在原油中,当原油被带到地面释放压力时,伴生气就会被释放出来。到 2020 年,这五个地区的伴生气和石油产量的产量一直在增加。在2016年至2019年期间,由于新原油产量高,伴生气产量以最快速度增长(61亿立方英尺/天)。在应对 COVID-19 大流行之后,随着原油需求的下降,2020年的原油和伴生天然气产量都出现了下降。
2020年,横跨德克萨斯州西部和新墨西哥州东部的二叠纪地区的伴生天然气产量占美国总产量的50%。在2020年,只有二叠纪地区的原油和伴生气产量都增加了,但这些增产并没有抵消其他四个地区原油和伴生气产量的下降。伴生气产量的增加部分归因于二叠纪地区天然气外送能力的提高。
伴生气包含天然气加工厂液体 (NGPL),例如乙烷、丙烷、正丁烷、异丁烷和天然汽油。NGPL 用作生产塑料、纤维和其他产品的原料;它们还用于加热和运输。尽管2020年伴生气产量下降,但在乙烷需求旺盛的推动下,多年的伴生气产量增长导致了2020年NGPL产量的创纪录高位。自2014年以来,无论是在国内还是通过出口,乙烷消费一直在稳步增长。
朱佳妮 摘译自 天然气工业
原文如下:
Associated natural gas production declines in 2020, following three years of growth
In 2020, annual production of associated-dissolved natural gas (or associated gas)—which is natural gas produced from oil wells—declined in the combined five major U.S. align="justify"> When natural gas dissolves in crude oil under the pressure of a rock formation, associated gas is released when the pressure align="justify"> In 2020, the Permian region, which spans parts of western Texas and eastern New Mexico, produced 50% of total U.S. associated gas. align="justify"> Associated gas contains natural gas plant liquids (NGPLs) such as ethane, propane, normal butane, isobutane, and natural gasoline. NGPLs are used as feedstocks to produce plastics, fibers, and other products; they are also used for heating and for transportation. Despite the 2020 decline in associated gas, years of rising associated gas production led to record high volumes of NGPL production in 2020, driven by high ethane demand. Ethane consumption has been growing steadily both domestically and through exports since 2014.