In Situ Quantification of Hydrocarbon in an Underground Facility in Tight Salt Rock

Paul, Benjamin; Shao, Hua; Hesser, Jürgen; Lege, Christian

doi:10.1007/978-3-319-09060-3_161

Cited by 3 publications

(2 citation statements)

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“…Microscopic investigations show that the void space with fluid inclusions along a grain boundary is not connected in a permeable condition [12,32]. However, the relatively low tensile strength of such zones compared to those of halite grains may lead to an opening of a pathway under the high fluid pressures associated with the imposed deviatoric stress state.…”

Section: Fluid Migration In Salt Under Thermal Hydraulic and Mechanic...mentioning

confidence: 99%

Coupled Processes at Micro- and Macroscopic Levels for Long-Term Performance Assessment Studies of Nuclear Waste Repositories

Shao,

Radeisen,

Hesser

et al. 2024

Minerals

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Performance assessment of nuclear waste repositories requires state-of-the-art knowledge of radionuclide transport properties. Additionally, the short-term development under thermal pulses and the long-term development of the near field—due to influences such as gas generation—must be evaluated. Key thermal-hydro-mechanical-chemical processes are strongly coupled on different spatial and temporal scales. To understand these coupling mechanisms, numerous material models and numerical codes have been developed. However, the existing constitutive approaches—which have been adapted to describe small-scale laboratory experiments and validated against real-scale field observations—are often unable to capture long-term material behavior with sufficient precision. To build the confidence, a more comprehensive understanding of the system at micro- and macroscopic scales is required. Most observed macroscopic processes result from microscopic changes in the crystal structure and/or crystalline aggregates, as well as changes in material properties under the influence of various factors. To characterize these physical fields in crystals, microscopic investigations, such as visualization, or geophysical methods are introduced to verify the understanding at the microscale. Two cases are demonstrated for the presented concept using microscale information: one deals with the mechanically and thermally driven migration of fluid inclusions in rock salt, the other with dilatancy-controlled gas transport in water-saturated clay material.

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Section: Fluid Migration In Salt Under Thermal Hydraulic and Mechanic...mentioning

confidence: 99%

Coupled Processes at Micro- and Macroscopic Levels for Long-Term Performance Assessment Studies of Nuclear Waste Repositories

Shao,

Radeisen,

Hesser

et al. 2024

Minerals

Self Cite

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“…Due to its excellent self-healing ability, low permeability and good long-term creep behavior, salt rock has been recognized as an ideal medium for underground energy storage and nuclear waste disposal [1][2][3]. While the main composition of pure salt rock is sodium chloride, the composition of impure salt rock is more complicated.…”

Section: Introductionmentioning

confidence: 99%

Impurity Effects on the Mechanical Properties and Permeability Characteristics of Salt Rock

et al. 2020

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Impure salt rock strata are extensively distributed in China, giving them great significance in the study of the physical properties of impure salt rock for the construction of underground gas storage in salt mines. To investigate the confining pressure and impurity effects on the mechanical properties and gas permeability characteristics of salt rock, permeability tests under hydrostatic confining pressure and conventional triaxial compression (CTC), on salt rock samples with different impurity contents, were carried out. The results demonstrate that the confining pressure effects cause an increase in triaxial compression strength, but a decrease in permeability. However, impurity enhances the bearing capacity and permeability of the salt rock; both rock strength and permeability increase with an increase in impurity content. Moreover, the broken salt rock specimens were analyzed after the CTC test using Computed Tomography (CT) equipment. To understand the relationships between pore volume and permeability, considering the confining pressure and impurity effects, the cracks were divided into four groups according to different crack diameter ranges: ~0.05 mm, 0.05–1 mm, 1–10 mm and ~10 mm. The CT analysis results show that while the pore volume of smaller cracks shows an “increasing–decreasing” trend by increasing confining pressure, the pore volume of large cracks gradually decreases, indicating that the rock permeability is highly related to macro-cracks. However, impurity has more complicated implications on rock permeability and cracks, and needs further investigation.

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Modeling thermally driven migration of brine in bedded salt

Shao,

Hesser,

Wang

et al. 2024

Geomechanics for Energy and the Environment

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In Situ Quantification of Hydrocarbon in an Underground Facility in Tight Salt Rock

Cited by 3 publications

References 0 publications

Coupled Processes at Micro- and Macroscopic Levels for Long-Term Performance Assessment Studies of Nuclear Waste Repositories

Coupled Processes at Micro- and Macroscopic Levels for Long-Term Performance Assessment Studies of Nuclear Waste Repositories

Impurity Effects on the Mechanical Properties and Permeability Characteristics of Salt Rock

Modeling thermally driven migration of brine in bedded salt

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