Thermodynamic model of redissolution of calcium sulfonate precipitates in NaCl solutions

Conference · Fri Jan 01 04:00:00 EST 1982 · Soc. Pet. Eng. AIME, Pap.; (United States)

OSTI ID:6222792

Manev, E D; Celik, M S; Ananthapadmanabhan, K P; Somasundaran, P

Precipitation-redissolution-reprecipitation phenomenon in sodium dodecylsulfonate system has been investigated. At various levels of CaCl2 in a wide range of NaC1 concentration. Precipitation and residual sulfonate concentrations were estimated by chemical analysis while critical micelle concentrations of various solutions were determined by specific conductivity, Kraft point solubility, surface tension and dye solubilization techniques. While precipitation is found to be caused by the formation of calcium disulfonate, redissolution was observed to occur only when micelles are formed. Correlation of the effect of ionic strength on the redissolution to that of it on micellization supports the proposed mechanism of micellar redissolution. The thermodynamic model with capabilities to predict the nature and concentrations of various species in different solutions, given the thermodynamic constants and the initial levels of surfactants and inorganic ions has been developed. 20 refs.

• Research Organization: Columbia Univ, New York, NY, USA
• OSTI ID: 6222792
• Report Number(s): CONF-820169-
• Conference Information: Journal Name: Soc. Pet. Eng. AIME, Pap.; (United States)
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020300* -- Petroleum-- Drilling & Production
ALKALINE EARTH METAL COMPOUNDS
CALCIUM COMPOUNDS
DISSOLUTION
ENHANCED RECOVERY
FLUID INJECTION
MATHEMATICAL MODELS
MICELLAR SYSTEMS
OIL WELLS
ORGANIC COMPOUNDS
ORGANIC SULFUR COMPOUNDS
PARTICLE MODELS
PRECIPITATION
RECOVERY
SCALING
SEPARATION PROCESSES
STATISTICAL MODELS
SULFONATES
SURFACTANTS
THERMODYNAMIC MODEL
WATERFLOODING
WELLS