Thermo-coupled FSI analysis of LN2 jet impinging on hot dry rock

Wu, Xiaoguang; Huang, Zhongwei; Dai, Xianwei; Song, Hengyu; Zhang, Shikun

doi:10.1016/j.applthermaleng.2019.114621

Cited by 20 publications

(7 citation statements)

References 30 publications

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“…The temperature of hot dry rock is usually between 150 and 650 °C, which is too high for most drilling fluids. Liquid nitrogen substantially lowers the temperature of the rock mass, improves thermal extraction, and allows the use of different drilling fluids …”

Section: Ln2 Fracturing Processesmentioning

confidence: 99%

“…Liquid nitrogen fracturing requires reasonable pumping rate and LN 2 pressure and a high-temperature fluid . If formation pressure exceeds LN 2 injection pressure, the fluid in the pores of the reservoir will easily flow into the wellbore . In severe cases, blowout accidents will occur.…”

Section: Challenges and Future Perspectivesmentioning

confidence: 99%

“…Liquid nitrogen substantially lowers the temperature of the rock mass, improves thermal extraction, and allows the use of different drilling fluids. 183 6.5. LN 2 Jet Fracturing.…”

Section: Mechanisms Of Ln 2 Fracturingmentioning

confidence: 99%

See 2 more Smart Citations

Advances in Liquid Nitrogen Fracturing for Unconventional Oil and Gas Development: A Review

et al. 2022

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Liquid nitrogen (LN 2 ) fracturing is an anhydrous fracturing technology that enhances coal permeability and supports unconventional oil and gas exploitation. In this Review, we provide a systematic review of five aspects of LN 2 fracturing. They are the history of the technology's development, research topics, factors influencing fracturing efficiency, fracturing mechanism, and engineering processes and systems. Liquid nitrogen fracturing transforms coal and rock pore structure through mechanisms such as low temperature, freeze−thaw damage, and gas expansion. It changes coal and rock mechanical properties and improves the pore penetration and efficiency of unconventional oil and gas extraction. However, in-depth studies are still required in many areas. They include theoretical studies of twophase nitrogen flow in coal and rock, development of technical equipment to support field operations, and plans to monitor and evaluate fracturing efficiency. On the basis of the advances in LN 2 fracturing research and the challenges, we conclude that future research should focus on multiphase flow and field equipment and technology.

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Section: Ln2 Fracturing Processesmentioning

confidence: 99%

Section: Challenges and Future Perspectivesmentioning

confidence: 99%

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Advances in Liquid Nitrogen Fracturing for Unconventional Oil and Gas Development: A Review

et al. 2022

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“…Ren et al [8] established a numerical model of particle water jet impacting rock by using the SPH-FEM coupling algorithm and studied the damage mechanism of particle water jet coupled impact. Wu et al [9] built a thermal-fluid-solid coupled model to investigate the distribution of thermal stress in granite subjected to liquid nitrogen jet impact.…”

Section: Introductionmentioning

confidence: 99%

Fragmentation Pattern and Removal Mechanism of Concrete Subjected to Abrasive Water Jet Impact

Zhu

Xue

et al. 2021

Advances in Materials Science and Engineering

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Abrasive water jet (AWJ) breaking technology is suitable for the maintenance and repair of concrete structures, generating minimal dust, low tool wear, and no vibrations or selective destruction. The failure features and mechanisms of concrete subjected to AWJ impact are fundamental issues of AWJ breaking technology, which are also related to the safety and quality of engineering construction. Based on computed tomography (CT), scanning electron microscopy (SEM), and image processing technology, this paper studied the fragmentation pattern and removal mechanism of concrete under AWJ impact. The general failure characteristics and crack propagation law of concrete subjected to AWJ impact were described through AWJ impact concrete tests. The spatial distribution of damage in concrete subjected to AWJ impact can be divided into the intensive action zone, the transition zone, and the weak action zone. The removal mechanism of AWJ was discussed by comparing the impact performance of a pure water jet (PWJ) system. The results indicate that abrasive particles can cause cliff-shaped fracture and lip-shaped distortion in the aggregate part and flat fracture surface in the matrix part. There is no obvious crack in the interfacial transition zone (ITZ) due to the weakening of the water wedge effect.

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“…It is estimated that the energy content of HDR is 300 times of fossil fuel resources. Liquid nitrogen (LN 2 ) fracturing is an excellent method to produce geothermal energy (Wu et al 2019, Wu et al 2020, Yang et al 2021, and it is possible to form a large-scale fracture network with a good underground conductivity (Cha et al 2014). LN 2 is a cryogenic uid with a boiling temperature of − 195.8°C, at atmospheric pressure.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on the Compressive Strength and AE Characteristics of High-temperature Treated and LN2 Cooled Sandstone

Ding

Sun

Jia

et al. 2021

Preprint

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Liquid nitrogen (LN2) fracturing is beneficial to the development and utilization of geothermal energy. In this paper, the red sandstone was heated from room temperature to different temperatures (25°C-800°C) and then cooled with LN2. After attaining the room temperature, NMR, uniaxial compression, and acoustic emission (AE) tests were conducted, and results were compared for different samples. The results showed that with the increase in quenching temperature difference, the volume of micropores decreased gradually, while the volume of fine pores, mesopores, macropores and total porosity increased, resulting in the reduction of the compressive strength. Higher quenching temperature difference also reduced the sample’s total time to fail, and the failure mode was transformed from single inclined shear failure to conical failure. This is because the thermal stress (caused by the rapid cooling of LN2) expanded the original cracks of the sandstone, leading to high porosity and low compressive strength of the heat-treated and quenched samples.

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Thermo-coupled FSI analysis of LN2 jet impinging on hot dry rock

Cited by 20 publications

References 30 publications

Advances in Liquid Nitrogen Fracturing for Unconventional Oil and Gas Development: A Review

Advances in Liquid Nitrogen Fracturing for Unconventional Oil and Gas Development: A Review

Fragmentation Pattern and Removal Mechanism of Concrete Subjected to Abrasive Water Jet Impact

Experimental Study on the Compressive Strength and AE Characteristics of High-temperature Treated and LN2 Cooled Sandstone

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