Topic
Brine
About: Brine is a research topic. Over the lifetime, 6542 publications have been published within this topic receiving 76741 citations.
Papers published on a yearly basis
Papers
More filters
TL;DR: Amorphous silica scale enriched in aluminum is formed by tetrahedrally-coordinated aluminum substitution within an amorphous framework in geothermal brines as mentioned in this paper.
97 citations
TL;DR: The potential for self-limiting flow along wellbore defects despite flow of aggressive scCO(2)-brine mixtures is shown, attributed to the migration and reprecipitation of alteration products derived from cement within the defect.
Abstract: Leakage of CO2 and brine from geologic storage reservoirs along wellbores is a major risk factor to the success of geologic carbon sequestration. We conducted multiphase [supercritical (sc)CO2-brine] coreflood experiments that simulate a leakage pathway along the cement/rock interface. A composite core constructed of oil-well cement and siltstone separated by a simulated damage zone (defect) containing ground cement and siltstone was flooded with brine + scCO2 at 10 MPa and 60 °C parallel to the defect. During coinjection of scCO2, the effective brine permeability decreased from ∼200 to 90 mD due to transition to two-phase flow and then further declined to 35 mD. CO2 injection resulted in a pH drop from 11 to 4 and carbonate-undersaturated conditions in the produced brine. Microscopy revealed leaching and erosion along the defect, a carbonation front extending 5 mm into the cement, parallel to the damage zone, and no change in the dimensions of the defect. Carbonation of cement does not appear to explain ...
97 citations
TL;DR: In this paper, the authors measured the changes in nano-scale mechanical properties induced by acid exposure and found that the carbonate rock matrix partially dissolved, and absolute and effective porosity and permeability significantly increased.
96 citations
96 citations
TL;DR: In this paper, an anionic surfactant blend, alcohol, and partially hydrolyzed polyacrylamide was used to separate oil-in-water emulsions.
Abstract: Selected cationic and amphoteric surfactants were effective in separating oil-in-water emulsions representative of produced emulsions expected during a surfactant/polymer (SP) process for enhanced oil recovery. The aqueous phase of the emulsion contained an anionic surfactant blend, alcohol, and partially hydrolyzed polyacrylamide. Brine composition was a suitable mixture of formation brine with brines from the surfactant slug and polymer drive. The crude oil had an American Petroleum Institute (API) gravity of 31°. Bottle tests were conducted at ambient temperature, which is near the reservoir temperature. Conventional non-ionic demulsifier resins and polymeric cationic flocculants were not effective in removing oil from the aqueous phase. The water content of the oil phase was still well above specification upon heating the emulsions to 50−60 °C. However, both oil and water phases of acceptable quality were obtained after 6 h of settling upon the addition of 200 ppm of octyltrimethylammonium bromide (C8...
96 citations