scope:

This standard covers the physical properties, potential contaminants, and test procedures for heavy brine fluids manufactured for use in oil and gas well drilling, completion, fracturing, and workover fluids.

This standard provides methods for assessing the performance and physical characteristics of heavy brines for use in field operations. It includes procedures for evaluating the density or specific gravity, the clarity or amount of particulate matter carried in the brines, the crystallization point or the temperature at which the brines make the transition between liquid and solid at atmospheric pressure (a discussion of crystallization temperature under pressure is provided Annex C), the pH, iron contamination, and buffering capacity. This standard also contains a discussion of gas hydrate formation and mitigation (Annex B), brine viscosity (Annex D), corrosion testing (Annex E), and a daily completion fluids report with example (Annex A).

NOTE Procedures for evaluating the crystallization point, pH, and buffer capacity of brines are not applicable to formate brines. Procedures applicable to formate brines are found in ISO 13503-3:2022 ^[4].

This standard is intended for the use of manufacturers, service companies, and end users of heavy brines.