The phrase "acid fluids" is correct and usable in written English.
It can be used in scientific or medical contexts to refer to fluids that have acidic properties or pH levels.
Example: "The laboratory analysis revealed that the sample contained high levels of acid fluids, which could be harmful to the environment."
Alternatives: "acidic solutions" or "acidic liquids".
The initial viscosity of the acid fluids was low.
Overall, the interaction with acid fluids causes a severe mineralogical alteration of the cement and the development of a carbonated, low-porosity layer near the reservoir interface.
SDVA acid is one kind of In Situ Self-Diverting acid fluids that are widely used for diverting acid into a low-permeability zone in carbonate reservoir treatment, thus stimulating the production of the heterogeneous reservoir effectively.
The simulations predict a two-stage evolution of the cement porous matrix, after interaction with acid fluids from reservoir: (i) a first, "clogging" stage, characterized by a decrease in porosity due to calcite precipitation, and (ii) a second stage of porosity reopening, related to the disappearance of primary cement phases, and the re-dissolution of secondary minerals, such as zeolites.
Acid fluids in volcanic-hydrothermal systems dissolve volcanic host rocks.
The upper part most likely represents clayey sediments containing hydrothermal acid fluids, whereas the lower part is probably associated with the presence of rather resistive volcanic gases.
Analysis of this unique oil shows that it is a waxy secretion of the proventriculus (the first chamber of the stomach), rich in vitamins A and D. In most birds the walls of the proventriculus produce an acid fluid that rapidly breaks down raw food entering from the esophagus.
Large amount of acid fluid was brought into the reservoir due to the hydrocarbon generation of the mature of organic matters which had dissolved the soluble components.
In all of these systems, however, the acid fluid selection follows guidelines that do not reflect the recent technological advances in acidizing blends formulations, such as phosphonic acid blends and acid chelating blends.
Both Domelon et al. (1992) and Xiong and Holditch (1994) introduced robust rule-based systems for acid fluid selection that are damage-type specific, and depend primarily on the formation mineralogy and the produced fluid composition.
The better the sediment particle sorting is, and the lower the shale content is, the more the intergranular porosity can be maintained, to provide a channel for the migration of acid fluid in a later period.
