Constraining fluid-rock interactions during eogenetic karst and their impacts on carbonate reservoirs: Insights from reactive transport modeling

Xiong, Ying; Hou, Zhengmeng; Tan, Xiucheng; Luo, Jiawen; Yue, Ye; Wu, Kunyu

doi:10.1016/j.apgeochem.2021.105050

Cited by 13 publications

(3 citation statements)

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“…The reactive transport model plays a crucial role in studying the behavior of solutes in the subsurface environment [147][148][149]. Its wide application extends to predicting fluid behavior in porous media during petroleum and natural gas production [146,150], as well as in the sequestration of carbon dioxide in saline aquifers [151]. In recent years, this technique has progressively been applied to the in situ leaching of uranium deposits.…”

Section: Prediction Technique For Fluid Flow and Geochemical Reaction...mentioning

confidence: 99%

A Review of In Situ Leaching (ISL) for Uranium Mining

Li,

Yao

2024

Mining

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Uranium, a cornerstone for nuclear energy, facilitates a clean and efficient energy conversion. In the era of global clean energy initiatives, uranium resources have emerged as a vital component for achieving sustainability and clean power. To fulfill the escalating demand for clean energy, continual advancements in uranium mining technologies are imperative. Currently, established uranium mining methods encompass open-pit mining, underground mining, and in situ leaching (ISL). Notably, in situ leaching stands out due to its environmental friendliness, efficient extraction, and cost-effectiveness. Moreover, it unlocks the potential of extracting uranium from previously challenging low-grade sandstone-hosted deposits, presenting novel opportunities for uranium mining. This comprehensive review systematically classifies and analyzes various in situ leaching techniques, exploring their core principles, suitability, technological advancements, and practical implementations. Building on this foundation, it identifies the challenges faced by in situ leaching and proposes future improvement strategies. This study offers valuable insights into the sustainable advancement of in situ leaching technologies in uranium mining, propelling scientific research and practical applications in the field.

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Section: Prediction Technique For Fluid Flow and Geochemical Reaction...mentioning

confidence: 99%

A Review of In Situ Leaching (ISL) for Uranium Mining

Li,

Yao

2024

Mining

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“…The present study focused on Ma5, which corresponds to the Dapingian-Darriwilian and was mostly deposited in a limited tidal flat environment. Under the influence of high-salinity seawater, the dolomite strata often contain gypsum-salt rocks and/or layers [41]. Affected by the Caledonian movement, the basin was uplifted in the Late Ordovician, and experienced weathering up to 130 Ma; Late Ordovician to Early Carboniferous strata are missing (Figure 1c) [36].…”

Section: Geological Settingmentioning

confidence: 99%

Section: Geological Settingmentioning

confidence: 99%

Controlling Factors of Meteoric Diagenesis in Karst Reservoirs: An Example from the Majiagou Formation, Ordos Basin, China

Yang

Zhang

et al. 2023

Minerals

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Karst reservoirs have always been a key field of oil and gas exploration. However, quantifying the process of meteoric transformation remains a persistent challenge that limits the accuracy of reservoir quality prediction. To explore the controlling factors of meteoric cementation on karst reservoirs, the Majiagou Formation of the Ordos Basin in China was selected as an example. The petrology; carbon, oxygen, and strontium isotopes; and in situ major, trace, and rare earth elements were used, types and origins of calcite cements were analyzed in detail. The results revealed five types of calcite cements (Cal-1~Cal-5), four types of cathodoluminescence (CL) intensities (dull, dull red, deep red, and bright red luminescence), and six types of rare earth element patterns (Pattern-1~Pattern-6). These five types of calcite cements developed in three periods. Cal-1 (transition CL) and Cal-2 (dull CL) were precipitated during the Early Pennsylvanian period, the meteoric freshwater was clean; Cal-3 (transition CL) and Cal-4 (bright red CL) were precipitated at the end of the Late Carboniferous period, the fluids had strong dissolution ability and were polluted by terrigenous debris; Cal-5 (transition CL) was deposited during the burial period, the fluid was pure pore water or groundwater. The control of the cement on the reservoir during the burial period was much weaker than that of meteoric cements. Therefore, explorations of karst reservoirs should be focused on weak cementation during the epigenetic period.

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