... of rockfall events is precipitation. For many rock slopes, rainfall is considered the primary rockfall trigger. In some cases, the relationship between rainfall amount and rockfall frequency presents as a linear correlation when studied using data averaged over an extended period (i.e. due to monitoring data...

... ABSTRACT: Biogeochemical-induced rock alteration is an evolving process that focuses on harnessing biologically induced chemical activities to change the mechanical properties and behavior of rocks. It often relies on enzyme-induced carbonate precipitation (EICP) which utilizes...

... spatial separation between dissolution and precipitation, with most of the precipitation occurring at locations separate from dissolution sites. Post-experiment analysis using scanning electron microscopy (SEM) revealed microstructural changes, including the appearance of etch pits, dissolution channels...

... in porous media geological subdiscipline mineral artificial intelligence reaction permeability transition initiation propagation evolution micro-fracture cloud fracture rock type reservoir geomechanics serpentinization mechanism ghassemi eigenstrain expansion deformation precipitation...

... proportional to precipitation and groundwater head. Moreover, the seismic activity also influenced the deformation as a secondary triggering effect. In addition, the slope movement characteristics were validated by surface topography monitoring measurements. The results showed that utilization of the optical...

... ABSTRACT We present a pore-scale numerical modeling study of coupled fluid flow, solute transport, and mineral dissolution/precipitation in 3D fractured carbonate rocks. The injected fluid can dissolve the carbonate and release carbonate ions into the solutions, which react with Ba 2...

... demonstrated the ability of trapping carbon in mineral form by injecting CO 2 -charged water in the subsurface. One key question to be addressed in assessing this technology is whether the mineral replacement resulting from the combined dissolution / precipitation process will either clog the pore space...

.... A proposed method to seal or influence fracture properties is Ureolysis-Induced Calcium Carbonate Precipitation (UICP), a bio-mineralization technology driven by the enzymatic hydrolysis of urea, resulting in the formation of calcium carbonate. The resulting calcium carbonate can bridge the gaps in fractured...

... ABSTRACT Microbially-induced calcium carbonate precipitation (MICP) is a biological process in which microbially produced urease enzymes convert urea and calcium into solid calcium carbonate (CaCO 3 ) deposits. Studies have shown that MICP can be used to seal fractures in shale, raising...

... experiment oklahoma engineering day reaction reaction mineralogical composition breakdown permeability fines migration precipitation geological subdiscipline caney shale clay mineral cuttings interaction ARMA 23 0881 Produced Fluid Induced Mineralogy and Elemental Alterations of Caney Shale...

... mechanism quantitatively impact creep in granular systems that involve such complex geometric and multi-physical conditions? reservoir geomechanics gradient concentration upstream oil & gas crunch creep compaction solubility reservoir characterization rutqvist precipitation diffusion...

... importance to ensure its long-term sealing integrity. In this study, we conduct microbial-induced-calcite-precipitation (MICP) experiments for sealing anhydrite fractures (artificially cut) with gouges. MICP involves a bio-chemical reaction for calcite precipitation using ureolytic microorganism...

..., fracture geometry, fluid saturation) on barite precipitation in shale under representative subsurface conditions, as well as the effects of induced barite precipitation on fracture permeability. A series of triaxial direct shear experiments was designed to promote barite precipitation in fractured shale...

... ABSTRACT: The chemo-mechanical loading of rocks causes the dissolution and precipitation of multiple phases in the rock. This dissolution and precipitation of load-bearing mineral phases lead to the stress redistribution in neighboring phases, which in turn results in deformational changes...

... ABSTRACT: Fracturing of rock allows ingress of fluids that may be chemically distinct from native pore fluids. These external fluids can induce dissolution and precipitation, which may be enhanced by highly reactive, comminuted material and metastable highly deformed materials. Reaction...

... ABSTRACT: Microbially induced calcite precipitation (MICP) is a ground improvement technique where the metabolic activities of bacteria are utilized to produce calcium carbonate precipitants at the grain contacts or within the pore spaces, enhancing bonding between the soil particles thus...

... ABSTRACT: The pollution damage of injected water, fracturing fluid and drilling fluid in carbonate reservoir are mainly studied, however, the potential product precipitation damage have been seldom studied. Majiagou Formation in Daniudi gas field mainly has two kinds of rock samples, one...

... into the subsurface. To return to equilibrium, dissolution and precipitation of minerals may occur. These reactions have implications on the petrophysical properties of the reservoir. Whiles dissolution and precipitation of minerals can enhance porosity and permeability, the reverse can also be true. For example...

...) swelling and shrinkage due to bentonite hydration or de-hydration; (3) dilution/concentration, migration and exchange of ions impacted by moisture/thermal interactions, (4) dissolution/precipitation and mineral phase transformation, etc. (Zheng et al., 2010). While bentonite behavior for temperature...

... cause secondary precipitation damage after reacting with the reservoir rock. In this study, a new acid with a low reaction rate, chelating effect, and high gel breakage is developed that can enhance the conductivity of created fractures by minimizing gel residues and inhibiting secondary precipitations...