Impact of Inorganically Bound Sulfur on Late Shale Gas Generation
Impact of Inorganically Bound Sulfur on Late Shale Gas Generation
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DOI：
10.1021/ef401468w
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发表时间：
2014-01
期刊：
影响因子：
5.3
通讯作者：
Qingtao Wang;Hong Lu;Chenchen Shen;Jinzhong Liu;P. Peng;C. S. Hsu
中科院分区：
文献类型：
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作者：
Qingtao Wang;Hong Lu;Chenchen Shen;Jinzhong Liu;P. Peng;C. S. Hsu
对中国西北部塔里木盆地奥陶系萨尔干组的成熟页岩样品进行了非等温受限热解。实验使用加水的金管以非常慢的加热速率 (2 °C/h) 和 336 至 600 °C 之间的最终温度进行。为了研究无机结合硫对气体产生的影响，并考虑含硫矿物（例如页岩中常见的黄铁矿）的地质赋存情况，在添加和不添加 MgSO4、CaSO4 和黄铁矿的情况下进行了实验。高度成熟的页岩在未添加矿物质的情况下形成了大量的甲烷和少量的湿气，这表明在石油峰值窗口到期后具有巨大的后期天然气生成潜力。在添加硫酸盐和黄铁矿的实验中，所有有机气体以不同比例被消耗，导致不同的化学和稳定碳同位素组成。黄铁矿处理直接影响湿气 (C2–C5) 的释放，...
Nonisothermal, confined pyrolysis was applied to a mature shale sample from the Ordovician Salgan Formation in Tarim Basin, northwest China. Experiments were conducted using gold-tubes with added water at a very slow heating rate (2 °C/h) and end temperatures between 336 and 600 °C. To investigate the influence of inorganically bound sulfur on the generation of gases and to consider the geological occurrence of sulfur-containing minerals, such as prevalent pyrite in shales, the experiments were carried out with and without admixtures of MgSO4, CaSO4, and pyrite. High amounts of methane along with lower amounts of wet gases were formed from highly mature shale without minerals added, demonstrating a huge late gas generation potential at post peak-oil window maturities. In the experiments with added sulfates and pyrite, all organic gases were consumed in varying proportions, resulting in different chemical and stable carbon isotopic compositions. Pyrite treatment affects wet gas (C2–C5) evolution directly, ...