Simplified calculation of CaCO/sub 3/ saturation at high temperatures and pressures in brine solutions

Journal Article · Thu Jul 01 04:00:00 EDT 1982 · J. Pet. Technol.; (United States)

DOI:https://doi.org/10.2118/10352-PA· OSTI ID:6470163

Oddo, J E; Tomson, M B

A simplified method to calculate CaCtheta/sub 3/ saturation is developed using only commonly measured field parameters. The calculated saturation index, l/sub s/, and pH values are accurate at high temperatures and pressures in brines and are compared with less sophisticated and more complex calculations. The final forms of l/sub s/ and pH calculations are derived using conditional equilibrium constants dependent on temperature, pressure, and ionic strength, which eliminate the need for activity coefficients. The l/sub s/ equation is presented in forms for calculation with known or derived pH and where the pH of the solution is unknown. Practical application of l/sub s/ is shown by calculating the scaling tendency of several geopressured energy wells of the U.S. Gulf Coast region.

• Research Organization: Rice Univ.
• OSTI ID: 6470163
• Journal Information: J. Pet. Technol.; (United States), Journal Name: J. Pet. Technol.; (United States) Vol. 34:7; ISSN JPTJA
• Country of Publication: United States
• Language: English

Related Subjects

03 NATURAL GAS
030300* -- Natural Gas-- Drilling
Production
& Processing
15 GEOTHERMAL ENERGY
150200 -- Geology & Hydrology of Geothermal Systems
ALKALINE EARTH METAL COMPOUNDS
BRINES
CALCITE
CALCIUM CARBONATES
CALCIUM COMPOUNDS
CALCULATION METHODS
CARBON COMPOUNDS
CARBONATE MINERALS
CARBONATES
CONTROL
ENERGY SYSTEMS
EQUATIONS
GEOPRESSURED SYSTEMS
HIGH PRESSURE
HIGH TEMPERATURE
MINERALS
NATURAL GAS WELLS
OXYGEN COMPOUNDS
PH VALUE
SATURATION
SCALE CONTROL
WELLS