Abstract Produced water is a byproduct of oil and gas production. The chemistry of produced water may provide information about the source of the fluid and its evolution, leading to an improved understanding of the hydrology of petroleum systems. In this study, samples from 19 wells from the Tuscaloosa Marine Shale (TMS) in Mississippi and Louisiana, USA were analyzed for their major and trace element compositions. Data obtained from produced waters from the TMS were compared to existing chemical data from produced waters collected from nearby hydrocarbon reservoir rocks within the Gulf Coast Basin. The results show that produced waters from the TMS are highly saline, with a mean concentration of 15.9 g/L of total dissolved solids. Comparison of the chemistry of produced water from the TMS to early flowback waters demonstrated a rapid shift from the more dilute fracturing fluid to the formation water endmember composition. Most of the trace metals showed a moderate to strong correlation with the overall salinity of the waters. Concentrations of Cu and V showed a moderate correlation with the amount of oil produced from the TMS wells, suggesting that these elements are strongly affiliated with the kerogen and subsequent dissolved (

中文翻译：

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美国塔斯卡卢萨海相页岩产出水的地球化学

摘要 采出水是石油和天然气生产的副产品。采出水的化学性质可提供有关流体来源及其演化的信息，从而增进对石油系统水文的了解。在这项研究中，分析了来自美国密西西比州和路易斯安那州塔斯卡卢萨海洋页岩 (TMS) 的 19 口井的样品的主要和微量元素组成。从 TMS 采出水中获得的数据与从墨西哥湾沿岸盆地附近烃类储层岩石收集的采出水中的现有化学数据进行了比较。结果表明，来自 TMS 的采出水含盐量高，总溶解固体的平均浓度为 15.9 g/L。TMS 产出水与早期返排水的化学比较表明，从更稀的压裂液到地层水端元成分的快速转变。大多数痕量金属与水域的整体盐度显示出中度至强的相关性。Cu 和 V 的浓度与 TMS 井的石油产量呈中度相关，表明这些元素与干酪根和随后的溶解密切相关。