Thermal pyrolysis-induced shale micro-cracks: 3D characterization and implication for reservoir stimulation

Qi, Chao; Liu, Jie; Liu, Keyu; Tuo, Jincai; Sun, Lina; Huang, Wanying; Li, Shijie; Regenauer-Lieb, Klaus

doi:10.1016/j.jgsce.2023.205107

Cited by 1 publication

(2 citation statements)

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“…Moreover, as a reference for the analysis of shale pore structure, the pyrolysis of shale organic matter can be divided into three stages [20]: an unpyrolytic stage (<300 degrees centigrade), a pyrolytic stage (300 degrees centigrade) and the end of the pyrolytic stage (>450 degrees centigrade). Due to the differences between shale samples, the temperatures of each stage are different, but the basic mechanism is the same [6].…”

Section: Influence Of Heating Temperature On Shale Matrix Transportmentioning

confidence: 99%

“…Shale gas reservoirs can be difficult to develop, owing to their low permeability and the low abundance of gas [3,4]. In situ heating technology is not only widely used in shale oil development [5][6][7], but has also been applied constantly in shale gas development [8][9][10]. Generally, the in situ heating technologies and yield-increasing mechanisms for shale gas and shale oil are consistent and universal [11].…”

Section: Introductionmentioning

confidence: 99%

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Study on the Inner Mechanisms of Gas Transport in Matrix for Shale Gas Recovery with In Situ Heating Technology

Li,

Hu,

et al. 2024

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In order to improve the productivity of shale gas, in situ heating technology has been applied generally. However, this technology is limited by unknown properties in heated matrix, e.g., permeability. Therefore, a method for measuring the permeability of heated shale matrix particles was designed, and transport tests were conducted on the shale matrix at heating temperatures of 100~600 degrees centigrade. Through fitting the experimental data with numerical simulation results, pore structures and permeabilities at different heating temperature conditions were obtained and the corresponding transport properties were determined. The porosity and pore radius were positively correlated with the heating temperature, while the tortuosity was negatively correlated with the temperature of the heat treatment. Despite the weakening effect of Knudsen diffusion transport, slippage transport played a critical role in the transport function of the heated shale matrix, and the domination became stronger at higher heating temperatures. The study of gas transport in heated shale matrix provides a guarantee for the effective combination of in situ heating technology.

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Section: Influence Of Heating Temperature On Shale Matrix Transportmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Study on the Inner Mechanisms of Gas Transport in Matrix for Shale Gas Recovery with In Situ Heating Technology

Li,

Hu,

et al. 2024

Processes

View full text Add to dashboard Cite

show abstract

Thermal pyrolysis-induced shale micro-cracks: 3D characterization and implication for reservoir stimulation

Cited by 1 publication

References 60 publications

Study on the Inner Mechanisms of Gas Transport in Matrix for Shale Gas Recovery with In Situ Heating Technology

Study on the Inner Mechanisms of Gas Transport in Matrix for Shale Gas Recovery with In Situ Heating Technology

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