Damage characteristics of shale with different bedding inclinations under high-pressure water jet impact after thermal treatment DOI
Zhaolong Ge,

Yuhuai Cui,

Qinglin Deng

et al.

Physics of Fluids, Journal Year: 2025, Volume and Issue: 37(2)

Published: Feb. 1, 2025

Water jet-assisted rock breaking is a conventional method for shale gas extraction. However, the complex conditions of deep reservoirs, including elevated temperatures and intricate stratification, obscure rock-breaking mechanisms jets. Therefore, this study conducted high-pressure water jet impact experiments on with five bedding angles (0°, 30°, 45°, 60°, 90°) four (room temperature, 100, 150, 200 °C). Computed tomography (CT) three-dimensional reconstruction techniques were used to analyze damage characteristics. Results indicate that increased temperature significantly enhances efficiency. The crack volume fraction at °C by 146.44 times compared 25 °C. new area exhibited sharp increase from 100 150 slow rate before after range, indicating presence threshold effective fragmentation impact. Damage showed significant anisotropy, depth increasing angle through emerged 90°, while peaked 45°. efficiency index (JREI) was introduced which integrates volume, area, characterize different conditions. These findings could provide theoretical basis enhancing shale.

Language: Английский

Damage characteristics of shale with different bedding inclinations under high-pressure water jet impact after thermal treatment DOI
Zhaolong Ge,

Yuhuai Cui,

Qinglin Deng

et al.

Physics of Fluids, Journal Year: 2025, Volume and Issue: 37(2)

Published: Feb. 1, 2025

Water jet-assisted rock breaking is a conventional method for shale gas extraction. However, the complex conditions of deep reservoirs, including elevated temperatures and intricate stratification, obscure rock-breaking mechanisms jets. Therefore, this study conducted high-pressure water jet impact experiments on with five bedding angles (0°, 30°, 45°, 60°, 90°) four (room temperature, 100, 150, 200 °C). Computed tomography (CT) three-dimensional reconstruction techniques were used to analyze damage characteristics. Results indicate that increased temperature significantly enhances efficiency. The crack volume fraction at °C by 146.44 times compared 25 °C. new area exhibited sharp increase from 100 150 slow rate before after range, indicating presence threshold effective fragmentation impact. Damage showed significant anisotropy, depth increasing angle through emerged 90°, while peaked 45°. efficiency index (JREI) was introduced which integrates volume, area, characterize different conditions. These findings could provide theoretical basis enhancing shale.

Language: Английский

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