Fracture networks inside the caprock for CO2 storage reservoirs may serve as leakage pathways. Fluid flow through fractured caprocks and bypass conduits, however, can be restrained or diminished by mineral precipitations. This study investigates precipitation of salt crystals in an artificial fracture network a function pressure–temperature conditions phase states. The impact rate on was also studied. primary research objective to examine whether block potential In this study, we developed...

Abstract One important unresolved question in reactive transport is how pore-scale processes can be upscaled and predictions made on the mutual effect of chemical fluid flow porous medium. It paramount to predict location mineral precipitation besides their amount for understanding fate properties. However, current models simulation approaches fail precisely where crystals will nucleate grow spatiotemporal domain. We present a new mathematical model probabilistic nucleation precipitation. A...

Porous materials in natural and engineered environments are subject to morphological changes resulting from interacting chemical physical processes. The intricate nature of these coupled processes, occurring at various temporal spatial scales, poses challenges predicting alterations porosity permeability. Delineating the controls mineral precipitation reactions is particularly challenging because it requires implementation nucleation criteria growth mechanisms. By conducting pore-scale...

Knowledge of crystal nucleation and growth is paramount in understanding the geometry evolution porous medium during reactive transport processes geo-environmental studies. To predict properties precisely, it necessary to delineate both amount location precipitation events spatiotemporal domain. This study investigates calcium carbonate crystals on a heterogeneous sandstone substrate as function chemical supersaturation, temperature, time. The main objective was evaluate solid formation...

Abstract Mechanical properties of petroleum reservoirs can be determined via static techniques based on laboratory triaxial tests under reservoir conditions. Dynamic approaches represent an alternative in cases where such data are unavailable. elastic calculated using ultrasonic wave measurements the or situ well logging. Different relationships have been proposed to estimate from dynamic ones available a particular reservoir. However, these often reservoir-specific, making them inadequate...

The IODP 392-U1581B borehole was drilled in 2022 about 300 km from the South African coast, at ~4500 m water depth Transkei Basin. recovered stratigraphic section includes Cenozoic, mostly carbonaceous, rocks and upper Cretaceous (Maastrichtian Campanian) siltstones with a low calcium carbonate content (

Permeability and physical properties of fine-grained clastic sediments show a wide range variations. Despite rather intensive research, the impact grain size distribution mineralogical composition individual rock constituents is not thoroughly investigated. We performed mechanical compaction brine-statured reconstituted borehole cuttings synthetic quartz-clay mixtures to study evolution in during burial. The primary objective was examine whether hydraulic could be described constrained by...

Abstract Predictive modeling of CO 2 storage sites requires a detailed understanding physico-chemical processes and scale-up challenges. Dramatic injectivity decline may occur due to salt precipitation pore clogging in high-salinity aquifers during subsurface injection. This study aims elucidate the impact -induced crystallization porous medium on geomechanical properties reservoir sandstones. As cannot be isolated from precursor interactions with acidified brine, we present comprehensive...

Fracture networks inside geologic [Formula: see text] storage reservoirs can serve as the primary fluid flow conduit, particularly in low-permeability formations. Although some experiments focus on geophysical properties of brine- and text]-saturated rocks during matrix flow, monitoring fracture when displaces brine seems to be overlooked. We have conducted laboratory a naturally fractured tight sandstone liquid injection. For experiment, low-porosity, low-permeability, core sample from...

Investigating fracture evolutions triggered by chemical interactions in caprocks of CO2 storage sites is great importance when caprock integrity concerned. Mineral heterogeneity one the factors affecting evolution. We present results from flow-through experiments deploying a unique high pressure geo-material microfluidic cell to monitor evolution four carbonate-rich caprocks: (1) homogeneous sample, (2) heterogeneous (3) shale and (4) organic representing different levels mineral...

In a full-scale CCS, millions of tons CO2 must be stored underground. Injection dry or undersaturated (with respect to water) leads dry-out formation water and salt precipitation. Salt precipitation during injection into the geological formations causes reduced injectivity negatively influences reservoir rock properties. It also may have potential block leakage pathways within fractured caprocks. The present-day reservoir-scale models consider mechanisms such as evaporation capillary...

Porous materials in natural and engineered environments are subject to morphological changes resulting from interacting chemical physical processes. The complexity of coupled flow, transport, processes that occur on different temporal spatial scales makes it difficult predict the porosity permeability alterations. Delineating controls mineral precipitation reactions is particularly challenging because requires implementation nucleation criteria attributes. By conducting pore-scale...

Summary Subsurface fluid flow and solute transport are pivotal in addressing pressing energy, environmental, societal challenges, such as geological CO2 storage. Basaltic rocks have gained prominence suitable substrates for injecting substantial volumes carbon mineralization, driven by their widespread occurrence, high concentrations of cation-rich silicate minerals, reported fast mineralization rate, favorable characteristics porosity, permeability, injectivity. The process within basaltic...

Deep-saline aquifers could be instrumental in the geological storage of carbon dioxide due to their relatively good reservoir properties, high volume, and prevalence. However, there are a few difficulties which should overcome obtain effective stores such reservoirs. Most problems related formation damage caused by salt precipitation. Due complexity systems, it is necessary identify crucial processes, phenomena, factors, products. In our work, we present novel platform trace precipitation...

Salt precipitation triggered by the evaporation of formation brine into injected supercritical CO2 can cause injectivity and containment issues in near-wellbore regions. Predicting distribution precipitated salts their impact on properties remains challenging. This study investigates influence surface wettability CO2-induced halite growth within hydrophilic hydrophobic microfluidic chips designed to mimic rock-structure porous geometries. A series high-pressure brine-CO2 flow experiments,...

Carbon sequestration in deep saline aquifers is a promising strategy for reducing atmospheric CO2 emissions. However, salt precipitation triggered by the evaporation of formation brine into injected supercritical can cause injectivity and containment issues near-wellbore regions. Predicting distribution precipitated salts their impact on properties remains challenging. This study investigates influence surface wettability CO2-induced halite growth within hydrophilic hydrophobic microfluidic...

Summary In the process of mineral nucleation and growth, substrate surface properties types introduce favorable areas where events are more likely to occur. The preferential sites for exist because lower interfacial free energy between precipitating phase substrate. this work, we used a pore-scale Lattice Boltzmann (LB)-based reactive transport model incorporated with developed probabilistic in our previous works investigate role nucleating on growth secondary minerals. We also Shannon...

Understanding and predicting sealing characteristics containment efficiency as a function of burial depth across sedimentary basins is prerequisite for safe secure subsurface storage. Instead estimators empirical relationships, this study aimed to delineate data-driven variability domains non-cemented fine-grained clastic caprocks. Constant rate-of-strain uniaxial compression experiments were performed measure changes in properties brine-saturated quartz–clay mixtures. The binary mixtures...

During CO2 storage, the near-wellbore environment experiences significant chemical, physical, thermal, and mechanical perturbations. Therefore, it is crucial to characterize coupled thermo-hydro-mechanical-chemical (THMC) processes in this region through representative experimental tests numerical simulations maximize safety cost-efficiency of storage. One common shortcoming current methods failing facilitate access replicate in-situ brine sources within geological repositories, particularly...

Summary A statistical methodology was presented for interpreting dynamic-to-static relationships. Respecting the importance of Young's modulus in seismic geomechanics, as case study performed on conversion. To this end, six core samples from studied oilfield were selected and in-situ stress curves obtained. Next, order to obtain static properties rocks, rock mechanics test carried out under reservoir condition. In same way, dynamic further using ultrasonic laboratory. Once finished with...

Precipitation and growth of solid phases during a reactive fluid flow solute transport are critical in many natural industrial systems. Mineral nucleation is prime example where (geo)chemical reactions give rise to geometry evolution porous media. The precipitation can reduce the amount void space, alter pore space connectivity morphology, modify tortuosity, deteriorate permeability, change transport. Additionally, events reshape available surface area for growth, leading changes reactivity,...