... 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...

... 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...

... 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: 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...

... 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...

... 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...

...) 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...

... mechanism modeling nmm boundary geometry simulation porosity precipitation diffusion macroscale salt creep ARMA 22 170 Linking Microscale Processes to Macroscale Salt Creep With a New THMC Model Hu, M.* Lawrence Berkeley National Laboratory, Berkeley, CA, US Steefel, C.I. Lawrence Berkeley...

... formation damage complex reservoir oilfield chemistry structural geology reservoir characterization hydraulic fracturing precipitation quartz composition concentration experiment laboratory production chemistry upstream oil & gas mineral composition kcl solution clay mineral...

... ABSTRACT: Over the past decades, the oil-well cement (OWC) has been used in sealing the wellbore-casing or inter-casing annular spaces. The Microbial-induced precipitation (MIP), on the other hand, is an emerging biomineralization cement system that can be utilized in energy, construction...

... core plugs were selected to conduct rock mechanical tests before and after salt precipitation. Ultimately, a mathematical model was established to investigate the mechanism of rock strength degradation. The results of sand production prediction indicated that sand production from rock skeletons should...

... fracturing, conventional inorganic acids can easily lead to sand formation in near-well and affect the production capacity, At the same time, hydrofluoric acid reacted with aluminosilicate can produce fluorosilicate, which will react again and form a series of insoluble colloidal precipitates. In addition...

... artificial rocks resembling natural beachrocks with similar strength and cement characteristics. To achieve this goal, Microbial Induced Carbonate Precipitation (MICP) driven by urea hydrolysis was employed. MICP utilizes bacterially produced calcium carbonate biominerals to improve the mechanical properties...

... runoff. precipitation experiment gowthaman feasibility slope soil stabilization Kawasaki Upstream Oil & Gas cementation cell pellet Reservoir Characterization concentration erosion injection bacteria stabilization permeability van paassen bacteria culture infiltration 1...

... at room temperature conditions, and cannot reflect the field situation under the reservoir conditions. So current optimized acids still produce secondary precipitation and difficultly apply in sandstone acidizing. Herein, based on the complexometric titration, an effective optimization method of one-step...

... geomechanics displacement slope movement Reservoir Characterization precipitation mechanism groundwater pressure monzonite slope movement mechanism mining machine learning Upstream Oil & Gas lower slope bingham canyon south wall south wall march 2011 brooklyn fault instability rock mass...

...%). AFM reveals an increase in surface roughness consistent with secondary precipitation reactions. Furthermore, scanning electron microscopy reveals the presence of mineral precipitation at grain boundaries. The results presented are important to understand the impact of geochemical reaction...

... fracture patterns. Upstream Oil & Gas pore pressure variation flow in porous media Sequestration simple simulation Reservoir Characterization Fluid Dynamics Simulation structural geology precipitation mechanism co 2 precipitation coefficient mineral dissolution simulation domain...