It has become an inevitable trend of human development to seek resources from the deep
underground. However, rock encountered in deep underground engineering is usually in an …

In tests of marine hydrate depressurization production in many countries, accidents such as
collapse and failure of boreholes have occurred, which caused by the evolution of the …

Coal strength and deformability anisotropy are one of the important contents of deep rock
mechanics, as well as a crucial aspect influencing the secure and efficient exploitation of …

The non-production time and consumption caused by borehole instability have elicited
worldwide concern in the exploration and production of fractured shale formations because …

Sedimental oil/gas reservoirs often exhibit transversely isotropic poroelastic characteristics.
Neglecting this anisotropic nature may lead to suboptimal predictions of wellbore stability …

Rock strength criteria are the theoretical grounding of geotechnical design and stability
estimation, the Mohr–Coulomb (MC) and Hoek–Brown (HB) criteria are the widely accepted …

The perforating phase leads to complex and diverse hydraulic fracture propagation
behaviors in laminated shale formations. In this paper, a 2D high-speed imaging scheme …

Borehole instability in igneous rock formation has attracted more and more attention in
recent ten years. In order to understand the mechanism of wellbore instability in igneous …

Borehole instability is a significant concern when drilling inclined wells through bedding
layers. Traditional drilling techniques have encountered various challenges due to shale's …

This study investigates the challenge of borehole instability in shale gas development,
focusing on the interactions among temperature, fluid flow, and stress. Using a thermal …