石油圈中国石化新闻网讯 据OGJ网12月18日消息 一项对全国主要页岩气的新分析表明，与5年前的预测相比，从未来油井中利用新技术开采的天然气可增长20%，研究人员将这种增长主要归因于新的钻探技术。 德克萨斯大学(UT)奥斯汀分校经济地质研究所分析调查了Barnett、Fayetteville、Haynesville和Marcellus油田的生产能力和预估的天然气总量，这项研究更新了2011-13年的发现。 Svetlana Ikonnikova是这项研究的主要参与者，也是该研究所的一位研究科学家。她表示在钻井技术、市场条件、成本结构等方面都取得了进展，地质特征技术的改进也促进了评估工作的升级。 研究人员发现，在四个页岩气藏的未来井中，除了在2017年12月31日之前已经通过钻井开采的110万亿立方英尺外，还能从技术上开采大约780万亿立方英尺的气体，而先前的研究预计在技术上只能开采650万亿立方英尺。 根据美国2017年27万亿立方英尺的天然气消费量，新的研究估计表明美国将增加大约5年的国内消费量。 预计的增长主要来自新的钻探技术，这些钻探技术提高了采收率，降低了单位成本，并允许公司即使在低油价或天然气价格期间继续钻探。 新的钻探技术包括使用叠加钻井、更紧密的钻井以及可以运行大约2英里的水平井。 王磊 摘译自 OGJ 原文如下： A new analysis of the nation’s major shale gas plays shows 20% more natural gas can be technically recovered from future wells compared with an estimate made 5 years ago. Researchers primarily attributed the increase to new drilling practices. The analysis by the University of Texas at Austin’s Bureau of Economic Geology examined production capabilities and estimated total gas in the Barnett, Fayetteville, Haynesville, and Marcellus plays. The study updated 2011-13 findings. Svetlana Ikonnikova, the principal investigator of the study and a research scientist at the bureau, said that developments in drilling technologies, market conditions, cost structures. and improvement in geological characterization prompted the updated assessment. Researchers found future wells in the four shale gas plays can technically recover about 780 tcf of gas in addition to 110 tcf already recovered by wells drilled by Dec. 31, 2017. The previous study found 650 tcf of technically recoverable gas. Based on US gas consumption of 27 tcf in 2017, the new estimate suggests the addition of about 5 years of domestic consumption. The projected increase comes largely from new drilling practices that increase recovery, reduce per-unit cost, and allow companies to continue drilling even during periods of low oil or natural gas prices. New methods include stacked drilling, drilling wells closer together, and horizontal wells that can run for about 2 miles.
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