Fracture Morphologies of Shale in Brazilian Tests Based on A Thin-Layer Model

Effect of Shale Transverse Isotropy on Hydraulic Fracture Propagation

Hydraulic fracturing is a critical technology for the efficient development of shale reservoirs. Induced by factors such as the preferred orientation of clay minerals, bedding planes, and natural fractures, shale exhibits pronounced transverse isotropy. The interaction between hydraulic fractures and these natural...

Fracture Propagation Characteristics and Influencing Factors in Cross-Layer Fracturing of Interlayered Shale Reservoirs

Hydraulic-fracture transmission across lithologic interfaces governs fracture-height growth and reservoir connectivity in shale–sandstone interbedded reservoirs, yet the coupled effects of mechanical contrast, interface properties, layer geometry, and operational parameters remain insufficiently quantified. A two-dimen...

Anisotropic progressive shear damage and fracture mechanisms of fractured shale based on acoustic-optical-mechanical methods

Bedding planes and natural fractures are key factors controlling the anisotropic mechanical properties of shale reservoirs, exerting a critical influence on underground engineering. However, their shear deformation and fracture evolution mechanisms remain poorly understood. In this study, synthetic shales containing be...

Research on the Stability of Arc-Fractured Rock–Concrete Composites: Mechanical Response and Energy Evolution

To mitigate the violent movement of overlying strata in goaf areas, rock–concrete composite support systems are widely utilized. However, the mechanical behavior of such systems under the influence of complex pre-existing defects, such as arc-shaped fractures, remains insufficiently understood. This study aims to c...

Fracture behavior of synthetic sandstone under hydro-mechanically coupled dual-period compressive torsion

Differential Propagation Laws and Mechanisms of Hydraulic Fractures Controlled by Reservoir Structural Effects

Coal-measure gas co-production is a critical strategy for enhancing the single-well productivity of unconventional natural gas. However, the pronounced vertical heterogeneity and complex combinations of co-existing reservoirs create substantial asynchronous propagation behaviors during hydraulic fracturing, fundamental...