Cited by Determining a representative elementary area for soil desiccation cracking

Relaxation-Mechanics Coupling Correlations for Different Sedimentary Rocks DOI

Jizhao Xu,

Sheng Qian,

Hongda Wen

et al.

Energy & Fuels, Journal Year: 2025, Volume and Issue: 39(9), P. 4277 - 4291

Published: Feb. 25, 2025

The complex pore size distribution and mechanical strength of rocks are critical parameters for characterizing unconventional energy development, fluid storage capacity, resistance to failure. Low-field nuclear magnetic resonance (NMR) technology uniaxial/triaxial loading failure tests common methods evaluating the structure rocks. potential quantitative correlations among these remain unclear due neglect rock anisotropy effects. This study, grounded in relaxation fracture mechanics theory, selected six types (φ25 mm × 50 mm) analyze relaxation-mechanics coupling responses. included total porosity (φNMR), T2 geometric mean (T2gm), arithmetic (T2am) pores, as well effective free pores (corresponding T2gmf T2amf, respectively), while compressive (σc) elastic modulus (E). results demonstrated that different exhibited distinct responses φNMR, T2gm, T2am, T2gmf, T2amf were negatively correlated with their respective parameters. These differences indicated scale connectivity largely determined both relaxation, large-scale providing numerous migration pathways water. accompanying time required water-pore wall collisions became longer, increased amplitude. However, blocks larger, connected generally lower presence weak points. fittings primarily influenced by distribution, crack tortuosity, permeability, capillary forces. Under confining stress conditions, nonlinear emerged mechanics, stress, indicating significant sensitivity mechanics-relaxation relationships. Confining positively structural integrity, pore/crack closure could impact reduced water intrusion. fitting variance three-dimensional varying surface roughness sensitivity. findings may contribute data inversion between using same core, achieving multipurpose utilization a single borehole practical engineering applications.

Language: Английский

Citations

Explainable machine learning and feature engineering applied to nanoindentation data DOI