... of connate brine. Damaged permeability for gas can be explained by both salt precipitation and clay fines migration, while damaged permeability for brine is due to clay fines migration and consequent pore blockage. permeability fluid dynamics subsurface storage climate change particle concentration...

... Abstract CO 2 sequestration in deep saline aquifers is vital to reduce the global carbon footprint. However, this effort can be hampered due to salt precipitation during CO 2 injection, which clogs flow pathways leading to a significant reduction in CO 2 injectivity. While freshwater has...

... that although many of the challenges are similar to those in conventional wells, there are also some that are different and unique – the same, but different! co 2 climate change subsurface storage geological subdiscipline geology reservoir geomechanics saline aquifer precipitation brine...

... porosity, permeability and injectivity, and put the entire project at risk. This paper demonstrates the impact of salt precipitation on formation damage and proposes remediation by using a low-salinity slug ahead of CO 2 injection. Calculations were performed using a reactive transport simulator...

...-D reservoir simulator that incorporates fluid flow, geomechanics, and geochemistry, along with a new model designed to accurately replicate the changes in rock properties resulting from cement degradation. Chemical reactions, including dissolution and precipitation, between CO2-rich brine and cement...

... chemistry enhanced recovery paraffin remediation hydrate remediation sio 2 flow assurance adsorption nanofluid asphaltene precipitation flocculation hydrate inhibition wax inhibition scale remediation wax remediation evaluation deposition heavy oil play reservoir characterization...

... hydrate remediation geological subdiscipline wettability permeability nanorpm alteration reservoir characterization drilling fluid chemistry implementation evaluation wax remediation tendency injection efficiency precipitation enhanced recovery paraffin remediation nanoparticle crude...

... stage acid has been used to stimulate the sandstone cores successfully without acid preflush and solvent preflush. A differentiating characteristic of the fluid is that it greatly reduces the risk of treatment failure by reducing primary, secondary, and tertiary precipitation, while maintaining high...

... fluid management & disposal fluid loss control oilfield chemistry completion installation and operations annular pressure drilling riser corrosion effective permeability directional drilling viscosity mineral oil well integrity precipitation formation damage production chemistry...

... and IC to measure calcium, iron and sulfate ions in solution. The results showed that mixing lactic and gluconic acids at a 1:1 molar ratio provided the optimal results as no precipitation occurred at total acids strengths of 10 wt% and up to 27 wt%. Seawater usage caused calcium sulfate precipitation...

... researchers an intensive guide for present and future research. drilling fluid property drilling fluids and materials drilling fluid selection and formulation HCl concentration solubility Upstream Oil & Gas organic acid acid drilling fluid formulation precipitation acid concentration...

... of the rock, whereas 2% brine solutions, especially 2% KCl, dissolve elements that could be the source of scales, fines migration, other types of undesired precipitations, as well as elements related to organic matter in the reservoir rock. A comparison of the dynamic and static elastic moduli and fluid...

... chemically reactive than sandstone minerals (e.g. quartz, feldspars, clays etc.) which have already been studied extensively. In nearly all cases, precipitates formed at higher SI concentrations were due to the formation of sparingly soluble SI/Ca complexes. A systematic study has been carried out on the SI...

... fluids, but it also happens naturally in form of scale precipitation which has been physically proved, and possibly fines migration which remains a theory yet to be verified. Several workflows, procedures, and research on the nature of the damage have been put in place to resolve the production loss...

... precipitation and remediation and compatibility with produced water and proppant pack conductivity data, of applicable fluids to show the effectiveness of the systems to the high temperatures of the reservoirs in the kingdom, 325°F will also be presented. The concept of using seawater as a base fluid...

... Abstract Stimulating offshore sandstone formations with depleted reservoir pressure is a challenge. The conventional practices for sandstone acidizing are to pump pre- and post-flush hydrochloric acid to minimize precipitates from the main hydrofluoric acid reacting with the carbonates...

... phenomena such as cation exchange in the reservoir resulting in decreased the recoveries. As waterfloods continue over decades, prevention of scale formation becomes a more significant factor that needs to be properly treated. The precipitation of inorganic scale is a major issue in injecting brines...

... a concentration of the ionic species present along with total dissolved solids and saturation indices (SI) for common mineral scales. However, if the samples are not being preserved properly, the scale would precipitate out of solution prior to analysis giving a lower than actual SI value. The first attempt...

... Abstract Scale inhibitor (SI) squeeze treatments are applied extensively for controlling scale formation during oil production. The current research involves phosphonate/metal precipitate studies in the context of precipitation squeeze treatments. The main focus here is on the precipitation...

... had increasing problems of asphaltene deposition for a number of years. Asphaltenes present in a crude oil under normal reservoir conditions will start to flocculate and precipitate in the critical near-wellbore matrix as the reservoir pressure drops, which greatly reduces the productivity...