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UT:利用新技術可從美國頁巖井中開采更多的天然氣

中國石化新聞網訊 據OGJ網12月18日消息 一項對全國主要頁巖氣的新分析表明,與5年前的預測相比,從未來油井中利用新技術開采的天然氣可增長20%,研究人員將這種增長主要歸因于新的鉆探技術。 德克薩斯大學(UT)奧斯汀分校經濟地質研究所分析調查了Barnett、Fayetteville、Haynesville和Marcellus油田的生產能力和預估的天然氣總量,這項研究更新了2011-13年的發現。 Svetlana Ikonnikova是這項研究的主要參與者,也是該研究所的一位研究科學家。她表示在鉆井技術、市場條件、成本結構等方面都取得了進展,地質特征技術的改進也促進了評估工作的升級。 研究人員發現,在四個頁巖氣藏的未來井中,除了在2017年12月31日之前已經通過鉆井開采的110萬億立方英尺外,還能從技術上開采大約780萬億立方英尺的氣體,而先前的研究預計在技術上只能開采650萬億立方英尺。 根據美國2017年27萬億立方英尺的天然氣消費量,新的研究估計表明美國將增加大約5年的國內消費量。 預計的增長主要來自新的鉆探技術,這些鉆探技術提高了采收率,降低了單位成本,并允許公司即使在低油價或天然氣價格期間繼續鉆探。 新的鉆探技術包括使用疊加鉆井、更緊密的鉆井以及可以運行大約2英里的水平井。 王磊 摘譯自 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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