Evaluation of the lithium resource in the Smackover Formation brines of southern Arkansas using machine learning

IF 11.7 1区综合性期刊 Q1 MULTIDISCIPLINARY SCIENCES

Science Advances Pub Date : 2024-09-27 DOI:10.1126/sciadv.adp8149

Katherine J. Knierim, Madalyn S. Blondes, Andrew Masterson, Philip Freeman, Bonnie McDevitt, Amanda Herzberg, Peng Li, Ciara Mills, Colin Doolan, Aaron M. Jubb, Scott M. Ausbrooks, Jessica Chenault

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引用次数: 0

Abstract

Global demand for lithium, the primary component of lithium-ion batteries, greatly exceeds known supplies, and this imbalance is expected to increase as the world transitions away from fossil fuel energy sources. High concentrations of lithium in brines have been observed in the Smackover Formation in southern Arkansas (>400 milligrams per liter). We used published and newly collected brine lithium concentration data to train a random forest machine-learning model using geologic, geochemical, and temperature explanatory variables and create a map of predicted lithium concentrations in Smackover Formation brines across southern Arkansas. Using these predicted lithium maps with reservoir parameters and geologic information, we calculated that there are 5.1 to 19 million tons of lithium in Smackover Formation brines in southern Arkansas, which represents 35 to 136% of the current US lithium resource estimate. Based on these calculations, in 2022, 5000 tons of dissolved lithium were brought to the surface within brines as waste streams of the oil, gas, and bromine industries.

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利用机器学习评估阿肯色州南部 Smackover 地层盐水中的锂资源

锂是锂离子电池的主要成分，全球对锂的需求大大超过了已知的供应量，而且随着世界从化石燃料能源过渡到其他能源，这种不平衡预计还会加剧。在阿肯色州南部的 Smackover 地层中观察到卤水中含有高浓度的锂（每升 400 毫克）。我们利用已公布和新收集的盐水锂浓度数据，使用地质、地球化学和温度解释变量训练随机森林机器学习模型，并绘制了阿肯色州南部斯马科弗地层盐水中的预测锂浓度图。利用这些预测的锂地图、储层参数和地质信息，我们计算出阿肯色州南部斯马科弗地层盐水中的锂含量为 510 万至 1900 万吨，占目前美国锂资源估计量的 35% 至 136%。根据上述计算，在 2022 年，5000 吨溶解锂作为石油、天然气和溴工业的废物流被带到地表的盐水中。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Science Advances 综合性期刊-综合性期刊

CiteScore

21.40

自引率

1.50%

发文量

1937

审稿时长

29 weeks

期刊介绍： Science Advances, an open-access journal by AAAS, publishes impactful research in diverse scientific areas. It aims for fair, fast, and expert peer review, providing freely accessible research to readers. Led by distinguished scientists, the journal supports AAAS's mission by extending Science magazine's capacity to identify and promote significant advances. Evolving digital publishing technologies play a crucial role in advancing AAAS's global mission for science communication and benefitting humankind.