The complex geologic history of sandstone CO2 storage sites can result in separate rock units that control chemomechanical weakening. Here we document the chemical and mechanical changes may occur during injection operations, linking potential instability to diagenesis burial history. Using Southwest Partnership Morrow B sandstone, combined flow either a CO2-rich formation water or through expe...

During drilling, almost 70% of wellbore instability issues result from the encountering shale formations. Various additives such as salts, silicates, and polymers are used in water-based mud to enhance its shale-inhibition capability; however, have certain limitations. Lately, ionic liquids deep eutectic solvents (DES) been by various research groups inhibitors drilling fluid due their biodegra...

Abstract Water-based fracturing fluids without an inhibitor promote clay swelling, which eventually creates wellbore instability. Several ionic liquids (ILs) have been studied as swelling inhibitors in recent years. The cations of the ILs are crucial to inhibitory mechanisms that take place during hydraulic fracturing. Individual studies were carried out on several with various cations, most fr...

Nanoparticle drilling fluids have the potential to minimize wellbore instability problems. There is a need for development of new generation handle problems especially in lost circulation zones and shale A rheological model needed accurately describe rheology nano base fluid because limited experimental data are currently available using carbon particles water mud Inability current methods addr...

Drilling a hole into rock results in stress concentration and redistribution close to the hole. When induced stresses exceed strength, wellbore breakouts will happen. Research on breakout is fundamental of stability. A sequence concentrations, falling, redistributions, which involve initiation, propagation, stabilization sequences. Therefore, simulating process very challenging. Thermoporoelast...

Abstract Defect detection and localization are key to preventing environmentally damaging wellbore leakages in both geothermal oil/gas applications. In this study, a multistep, machine learning approach is used localize two types of thermal defects within model. This includes comsol heat transfer simulation generate base data, neural network classify defect orientations, algorithm synthesize se...

We try to understand the various components affecting the stability of tunneling and wellbore operations. We use a series of advanced finite element (FE) simulations to obtain a dataset which contains the stress response of the soil during drilling operations as a function of 12 input parameters. Using Multivariate Adaptive Regression Splines (MARS), we create a simplified model of the simulati...