Gas Fracturing Simulation of Shale-Gas Reservoirs Considering Damage Effects and Fluid–Solid Coupling DOI Open Access

Enze Qi,

Fei Xiong, Yun Zhang

et al.

Water, Journal Year: 2024, Volume and Issue: 16(9), P. 1278 - 1278

Published: April 29, 2024

With the increasing demand for energy and depletion of traditional resources, development alternative sources has become a critical issue. Shale gas, as an abundant widely distributed resource, great potential substitute conventional natural gas. However, due to low permeability shale-gas reservoirs, efficient extraction poses significant challenges. The application hydraulic fracturing technology been proven effectively enhance rock permeability, but influence environmental factors on its efficiency remains unclear. In this study, we investigate impact gas under varying conditions using numerical simulations. Our simulations provide comprehensive analysis physical changes that occur during process, allowing us evaluate effects mechanics permeability. We find can induce internal fractures within rock, magnitude tensile stress decreases gradually process. boundary pressure mass is important factor affecting effectiveness fracturing, it exhibits inverse relationship with content present specimen. Furthermore, VL constant demonstrates direct correlation content, while PL exhibit it. simulation results insights into optimization different geological parameter conditions, offering guidance practical applications.

Language: Английский

Experimental study on the effect of heating and liquid nitrogen-cooling cyclic treatment on mechanical properties and fracturing characteristics of granite DOI
Yi Xue,

Linchao Wang,

Jia Liu

et al.

International Journal of Rock Mechanics and Mining Sciences, Journal Year: 2024, Volume and Issue: 176, P. 105691 - 105691

Published: March 8, 2024

Language: Английский

Citations

52
An experimental study on mechanical properties and fracturing characteristics of granite under high-temperature heating and liquid nitrogen cooling cyclic treatment DOI
Yi Xue, Xue Li, Jia Liu

et al.

Geoenergy Science and Engineering, Journal Year: 2024, Volume and Issue: 237, P. 212816 - 212816

Published: April 6, 2024

Language: Английский

Citations

39
Simulation of Gas Fracturing in Reservoirs Based on a Coupled Thermo-Hydro-Mechanical-Damage Model DOI Creative Commons

Enze Qi,

Fei Xiong,

Zhengzheng Cao

et al.

Applied Sciences, Journal Year: 2024, Volume and Issue: 14(5), P. 1763 - 1763

Published: Feb. 21, 2024

Gas fracturing technology for enhancing rock permeability is an area with considerable potential development. However, the complexity and variability of underground conditions mean that a variety physical parameters can affect outcome gas fracturing, temperature being critical factor cannot be overlooked. The presence field adds further to process gas-induced fracturing. To explore effects fields on technology, this paper employs numerical simulation software model extraction shale under different using techniques. computer simulations monitor variations in mechanical characteristics rocks during This analysis performed both prior following implementation field. results demonstrate significantly improves permeability; has impact effectiveness appropriately high temperatures capable effect. distribution plays crucial role influencing When low, effect diminished, resulting lower efficiency extraction. Conversely, when high, more pronounced, leading higher production efficiency. Optimal enhance efficacy consequently boost Changes have substantial extraction, selecting suitable recovery rate gas. paper, through simulation, investigates influence aim contributing its improved application engineering practices.

Language: Английский

Citations

20
Fracture propagation and pore pressure evolution characteristics induced by hydraulic and pneumatic fracturing of coal DOI Creative Commons
Zhengzheng Cao,

Xiangqian Yang,

Zhenhua Li

et al.

Scientific Reports, Journal Year: 2024, Volume and Issue: 14(1)

Published: May 1, 2024

Abstract A two-dimensional unsteady seepage model for coal using a finite element program is developed, and the temporal variations of key factors such as water pressure hydraulic gradient are analyzed in this paper. Additionally, triaxial rock mechanical experiment utilized pneumatic fracturing equipment on raw samples to investigate both processes conducted. Through these experiments, relationship between crack formation expansion examined. The analysis reveals that pore at inlet reaches its peak during rapid surges but diminishes over time. Conversely, outlet side exhibits gradual increase. Hydraulic most likely occur sudden increases pressure. Besides, permeability decreases, duration stabilization prolongs due intensified resulting from Moreover, an extended period high further risk fracturing. experimental findings indicate initially experience tensile failure influenced by air Subsequently, mode I cracks form under pressure, propagating along fracture surface becoming visible. main types observed diametrical failure, development fractures can be categorized into three distinct stages, which contains initial stage characterized slight volume changes while increases, when strength, closure marked little or even decreasing unloading. acoustic emission signal accurately corresponds stages.

Language: Английский

Citations

20
The law of infrared radiation generation and evolution of coal-rock fracture under load DOI
Xin Li, J.U. Bu, Zhen Yang

et al.

Infrared Physics & Technology, Journal Year: 2024, Volume and Issue: 139, P. 105338 - 105338

Published: May 1, 2024

Language: Английский

Citations

6
Wave attenuation coefficient and wave number of high-temperature granite after water cooling and air cooling DOI
Qian Yang,

Kuoh‐Cheng Yang,

Guangyao Li

et al.

Bulletin of Engineering Geology and the Environment, Journal Year: 2024, Volume and Issue: 83(10)

Published: Sept. 4, 2024

Language: Английский

Citations

5
Study on overburden failure characteristics and displacement rule under the influence of deep faults DOI Creative Commons

P. Zhang,

Yongjiang Wu, Zhengzheng Cao

et al.

Frontiers in Earth Science, Journal Year: 2024, Volume and Issue: 12

Published: April 30, 2024

Deep faults significantly impact the structural stabilities and deformation behaviors of their overburden rocks, which are key factors in underground engineering geological hazard research. Considering problem deep-fault-overburdened breaking during mining super-thick coal seams taking Yaoqiao Coal Mine as research object, fracture evolution characteristics displacement law non-structured fault-bearing corresponding to fully mechanized caving compared analyzed using numerical simulations physical similarity simulations. The results this study show following: 1) height overlying rock presents a specific change with advancement working face; initial rapid increase maximum 74 m is achieved when face advances 90 m; development plastic zone indicating past yield, decreases 54 becomes stable, final angle stabilizes at 70°. 2) In under normal fault conditions, from upper lower walls, roof forms masonry beam structure that slows down activation crack development. When moving away fault, movements water-conducting cracks fewer, than without faults. approaching influence increases, reaches value after crossing highlighting significant on 3) Through simulation test, it shown further compacted by collapses large range, resulting upward separation central gradually closed. These findings expected have important theoretical practical significance for deep design, disaster prevention, activity monitoring.

Language: Английский

Citations

4
Nonlinear evolution characteristics and seepage mechanical model of fluids in broken rock mass based on the bifurcation theory DOI Creative Commons

Jia Yunlong,

Zhengzheng Cao, Zhenhua Li

et al.

Scientific Reports, Journal Year: 2024, Volume and Issue: 14(1)

Published: May 14, 2024

With the deep extension of coal mining in China, fault water inrush has become one major disasters threatening safety production mine. Based on control equations steady state and non-Darcy seepage fractured rock mass, multi-parameter nonlinear dynamic mass are established this paper. dynamics theory, function variable system is derived, influence gradual change flow factors structural stability studied. The research achievements show that there three branches equilibrium system. Specifically, changes abruptly near limit parameter. delayed bifurcation, mine disaster such as occurs easily at bifurcation point. results great significance to enrich theory mine, reveal disastrous mechanism guide its prevention technology which can provide theoretical reference for predicting mass.

Language: Английский

Citations

4
Characterization of gas hydrate generation in SDS-R141b compounding static system DOI
Jun Xie,

Qingyao Meng,

Anqi Jiang

et al.

Energy Sources Part A Recovery Utilization and Environmental Effects, Journal Year: 2024, Volume and Issue: 46(1), P. 6725 - 6742

Published: May 17, 2024

Coal mine gas control has always been the focus of coal mining enterprises. Curing seam prevention and disaster technology is a new type local management to achieve rapid excavation. The key lies in changing generation conditions hydrate so that it can solidify reduce pressure seam. This paper measured contact angle four kinds thermodynamic accelerators on body, HCFC-141b was screened as by combining their own physical chemical properties. SDS-R141b compounding system used investigate its effect hydrate, results showed accelerator could effectively shorten induction time 20 min. transformed conventional I into II significantly reducing for generation. By adjusting ratio accelerators, optimal amount R141b added found be mR141b:mH2O=1:3.12. were compounded adding SDS each them find ratios make side-by-side comparison systems. comprehensive performance excellent. These findings are great significance preventing disasters mines.

Language: Английский

Citations

2
Gas Fracturing Simulation of Shale-Gas Reservoirs Considering Damage Effects and Fluid–Solid Coupling DOI Open Access

Enze Qi,

Fei Xiong, Yun Zhang

et al.

Water, Journal Year: 2024, Volume and Issue: 16(9), P. 1278 - 1278

Published: April 29, 2024

With the increasing demand for energy and depletion of traditional resources, development alternative sources has become a critical issue. Shale gas, as an abundant widely distributed resource, great potential substitute conventional natural gas. However, due to low permeability shale-gas reservoirs, efficient extraction poses significant challenges. The application hydraulic fracturing technology been proven effectively enhance rock permeability, but influence environmental factors on its efficiency remains unclear. In this study, we investigate impact gas under varying conditions using numerical simulations. Our simulations provide comprehensive analysis physical changes that occur during process, allowing us evaluate effects mechanics permeability. We find can induce internal fractures within rock, magnitude tensile stress decreases gradually process. boundary pressure mass is important factor affecting effectiveness fracturing, it exhibits inverse relationship with content present specimen. Furthermore, VL constant demonstrates direct correlation content, while PL exhibit it. simulation results insights into optimization different geological parameter conditions, offering guidance practical applications.

Language: Английский

Citations

0