Carbon dioxide (CO2) geosequestration in deep saline aquifers has been currently deemed as a preferable and practicable mitigation means for reducing anthropogenic greenhouse gases (GHGs) emissions to the atmosphere, can offer greatest potential from capacity point of view. Hence, research on core-scale CO2/brine multiphase migration processes is great significance precisely estimating storage efficiency, ensuring security, predicting long-term effects sequestered CO2 subsurface aquifers....

Granite is a typical crystalline material, often used as building but also candidate host rock for the repository of high-level radioactive waste. The petrographic texture-including mineral constituents, grain shape, size, and distribution-controls fracture initiation, propagation, coalescence within granitic rocks. In this paper, experimental laboratory tests numerical simulations grain-based approach in two-dimensional Particle Flow Code (PFC2D) were conducted on mechanical strength...

This paper investigates the deformation and fracture propagation of sandstone specimen under uniaxial compression using distributed fiber optic strain sensing (DFOSS) technology. It shows that DFOSS-based circumferential strains are in agreement with data monitored traditional gage. The DFOSS successfully scans full-field view axial on surface. spatiotemporal measurement based manifests crack closure elastoplastic deformation, detects initialization microcrack nucleation, identifies...

A microscopic 1D analytical model was developed for describing pore pressure diffusion wave propagation in porous media. The waves, being heavily damped, have relatively slow velocities and short wavelength, do not exhibit square-law behavior. Investigation on permeability effect attenuation dispersion penetration depth indicates that the transition zone peak shifts toward low frequency when decreases. Controversially, phase velocity high frequency-dependent of low-frequency waves well...

Carbon dioxide (CO2) geological storage in deep saline aquifers is a key measure to mitigate global warming. However, it still faces variety of technical challenges such as enhancing CO2 effective capacities. In this paper, preliminary model developed simulate migration during nanofluid-based supercritical aquifers. The main mechanisms, including Brownian motion, thermophoresis, thermal energy transfer, and interfacial tension, are included the proposed conceptual model. Based on...

Propagation of pore pressure and stress in water-saturated elastic porous media is theoretically investigated when considering the Darcy-Brinkman law. The wave mode, phase velocity, lag, damping factor, characteristic frequency are found from updated mathematic model. Brinkman term describes fluid viscous shear effects importantly contributes to dispersion relation damping. coincidence properties Biot waves first second kinds occurs at a frequency, which remarkably influenced by term. A key...

Abstract The densified powder material is convenient for storage and transportation, with broad market application prospects. In this study, the discrete element model parameters required simulating gluten densification were calibrated using Hertz–Mindlin JKR contact model. Initially, physical testing techniques utilized to assess size distribution, density, angle of repose (AoR) particles. Following this, Plackett–Burman test, steepest ascent Box–Behnken test conducted, significant factors...

Abstract Carbon dioxide (CO 2 ) can be at risk of leakage during its storage in deep saline aquifers due to stress field changes the reservoir. The aim this study was investigate effects CO injection pressure on dynamic strain response reservoir and migration process. A series core flooding experiments performed with the‐state‐of‐art fiber Bragg grating sensors. results show that surface linearly correlated pressure. velocity estimated from time differences among three gratings....

In this paper, we have examined the crack formation of weathered granite by monitoring acoustic emissions (AE) under uniaxial compression. Except for compressive strength (UCS), thresholds been determined closure, initiation and damage, respectively. Moreover, relationship has preliminarily established between AE energy rock damage variable. Compared to deformation failure characteristics unweathered granite, compression elastic modulus are significantly decreased. Additionally, consistently...

In order to study the effects of pre-existing fissures on failure characteristics granite after high-temperature treatment, samples containing three different sets were heated at temperatures (100–800°C), and then a uniaxial compression test was carried out. The major findings are as follows. (a) Temperature have great influence strength granite. When temperature is low, compressive exhibits an approximately linear upward relation with increasing α in range from 30 60°. However, temperature,...

In this study, CALPUFF was coupled with the MM5 model to estimate H2S pollution exposure from an accidental sour well blowout. The takes into account of detailed meteorological patterns, wet deposition and chemical transformations. An intercomparison performance against observed data is discussed examination scatter plots QQ provided. statistics show that correlation coefficient RMSE between modeled are 0.8805 2.3304, respectively. calculated concentrations greatest close source, spread...

Discrete element method (DEM) simulation is widely used to calculate the flow characteristics of particles under certain conditions. DEM input parameters are prerequisite for accurate modeling and particles. In order explore mechanical properties breaking behavior gluten pellets, pellet material property, interaction pellet–stainless steel pellet–pellet (multi-spheres autofill model), bonding (bonded particle model) were calibrated by experiments simulations. The relative error angle repose,...