A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
The Influences of Mineral Components and Pore Structure on Hydraulic Fracture Propagation in Shale
https://orcid.org/http://orcid.org/0009-0008-4327-3427
The microscopic mineral composition has an important impact on the mechanical properties of rock. By the computed tomography (CT) scanning, the mineral composition inside the shale core samples drilled from the Jimsar shale oil reservoir was identified. The numerical model of shale was established using an image reconstruction technique and basic mechanical parameters of mineral composition were obtained by nanoindentation tests. The influences of mesoscopic geotechnical properties (mineral components and porosity) and artificial parameters (perforation direction, perforation spacings, and fracturing fluid viscosity) on hydraulic fractures were investigated using a coupled hydraulic-mechanical (HM) model. The results indicate that the initial consecutive fractures control the propagation trace of hydraulic fractures and significantly reduce the stress shadow effect. The mineral particles and discrete pore structure are beneficial to the branching of fractures. Under the same fracturing strategy, an increase in the proportion of quartz promotes the complexity of hydraulic fractures. The increment of porosity after fracturing is negatively correlated with the initial porosity. For models without initial consecutive fractures, the complexity of hydraulic fractures and the stimulated volume increase with the decreasing fracturing fluid viscosity and increasing perforation spacing. The brittleness index determined by mineral components is closely related to post-fracturing porosity, which can provide references for optimizing hydraulic fracturing.
The influence of microscopic structure on hydraulic fracture was investigated.
The discrete pores are beneficial to the branching of fracture.
Consecutive fractures reduce the stress shadow effect.
The brittleness index is closely related to post-fracturing porosity.
The Influences of Mineral Components and Pore Structure on Hydraulic Fracture Propagation in Shale
https://orcid.org/http://orcid.org/0009-0008-4327-3427
The microscopic mineral composition has an important impact on the mechanical properties of rock. By the computed tomography (CT) scanning, the mineral composition inside the shale core samples drilled from the Jimsar shale oil reservoir was identified. The numerical model of shale was established using an image reconstruction technique and basic mechanical parameters of mineral composition were obtained by nanoindentation tests. The influences of mesoscopic geotechnical properties (mineral components and porosity) and artificial parameters (perforation direction, perforation spacings, and fracturing fluid viscosity) on hydraulic fractures were investigated using a coupled hydraulic-mechanical (HM) model. The results indicate that the initial consecutive fractures control the propagation trace of hydraulic fractures and significantly reduce the stress shadow effect. The mineral particles and discrete pore structure are beneficial to the branching of fractures. Under the same fracturing strategy, an increase in the proportion of quartz promotes the complexity of hydraulic fractures. The increment of porosity after fracturing is negatively correlated with the initial porosity. For models without initial consecutive fractures, the complexity of hydraulic fractures and the stimulated volume increase with the decreasing fracturing fluid viscosity and increasing perforation spacing. The brittleness index determined by mineral components is closely related to post-fracturing porosity, which can provide references for optimizing hydraulic fracturing.
The influence of microscopic structure on hydraulic fracture was investigated.
The discrete pores are beneficial to the branching of fracture.
Consecutive fractures reduce the stress shadow effect.
The brittleness index is closely related to post-fracturing porosity.
The Influences of Mineral Components and Pore Structure on Hydraulic Fracture Propagation in Shale
https://orcid.org/http://orcid.org/0009-0008-4327-3427
The microscopic mineral composition has an important impact on the mechanical properties of rock. By the computed tomography (CT) scanning, the mineral composition inside the shale core samples drilled from the Jimsar shale oil reservoir was identified. The numerical model of shale was established using an image reconstruction technique and basic mechanical parameters of mineral composition were obtained by nanoindentation tests. The influences of mesoscopic geotechnical properties (mineral components and porosity) and artificial parameters (perforation direction, perforation spacings, and fracturing fluid viscosity) on hydraulic fractures were investigated using a coupled hydraulic-mechanical (HM) model. The results indicate that the initial consecutive fractures control the propagation trace of hydraulic fractures and significantly reduce the stress shadow effect. The mineral particles and discrete pore structure are beneficial to the branching of fractures. Under the same fracturing strategy, an increase in the proportion of quartz promotes the complexity of hydraulic fractures. The increment of porosity after fracturing is negatively correlated with the initial porosity. For models without initial consecutive fractures, the complexity of hydraulic fractures and the stimulated volume increase with the decreasing fracturing fluid viscosity and increasing perforation spacing. The brittleness index determined by mineral components is closely related to post-fracturing porosity, which can provide references for optimizing hydraulic fracturing.
The influence of microscopic structure on hydraulic fracture was investigated.
The discrete pores are beneficial to the branching of fracture.
Consecutive fractures reduce the stress shadow effect.
The brittleness index is closely related to post-fracturing porosity.
The Influences of Mineral Components and Pore Structure on Hydraulic Fracture Propagation in Shale
Rock Mech Rock Eng
Li, Tianjiao (author) / Yao, Mingyu (author) / Xia, Yingjie (author) / Feng, Xianhui (author) / Cong, Wenyu (author) / Shi, Yaoli (author) / Tang, Chun’an (author)
Rock Mechanics and Rock Engineering ; 58 ; 2929-2952
2025-03-01
24 pages
Article (Journal)
Electronic Resource
English
The Influences of Mineral Components and Pore Structure on Hydraulic Fracture Propagation in Shale
| Springer Verlag | 2025
Propagation area evaluation of hydraulic fracture networks in shale gas reservoirs
| DOAJ | 2014
Fracture Propagation in Heterogeneous Porous Media: Pore-Scale Implications of Mineral Dissolution
| Online Contents | 2019