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Title: Carboxymethylated ethoxylated surfactants: Annual report

Abstract

A method of selecting surfactants for chemical enhanced oil recovery using carboxmethylated ethoxylated surfactants (CES) is described. Structure/performance correlations for hydrophobe, ethylene oxide content, and nonionic-anionic ratio have been developed for a series of CES with alkane carbon number, pH, salinity, phase inversion temperature, and solubilization parameter to provide a guide in selecting candidate surfactants for enhanced oil recovery. Carboxymethylated ethoxylated surfactants are a class of surfactants that generate low interfacial tension against crude oils at high temperatures, high salinities and high divalent ion concentrations. Selection of the surfactant for a specific reservoir can be made based upon determination of the phase inversion temperature (PIT) of the surfactant at reservoir salinity with live crude. An additional scan for phase behavior (salinity scan) can then establish salinity tolerance and solubilization parameters for the selected surfactant system. Correlations of PIT with surfactant structure, salinity, and hydrocarbon have been determined for a number of US reservoirs using CES as the only surfactant. 67 refs., 20 figs., 3 tabs.

Authors:
;
Publication Date:
Research Org.:
National Inst. for Petroleum and Energy Research, Bartlesville, OK (USA)
OSTI Identifier:
6253327
Report Number(s):
NIPER-228
ON: DE87001258
DOE Contract Number:  
FC22-83FE60149
Resource Type:
Technical Report
Resource Relation:
Other Information: Portions of this document are illegible in microfiche products. Original copy available until stock is exhausted
Country of Publication:
United States
Language:
English
Subject:
02 PETROLEUM; 37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; ENHANCED RECOVERY; REAGENTS; PETROLEUM; SURFACTANTS; CHEMICAL COMPOSITION; PERFORMANCE; WATERFLOODING; ADDITIVES; BENCH-SCALE EXPERIMENTS; CORRELATIONS; DRILL CORES; INTERFACES; OIL WELLS; PH VALUE; PHASE STUDIES; SALINITY; SANDSTONES; SURFACE TENSION; ENERGY SOURCES; FLUID INJECTION; FOSSIL FUELS; FUELS; RECOVERY; ROCKS; SEDIMENTARY ROCKS; SURFACE PROPERTIES; WELLS; 020300* - Petroleum- Drilling & Production; 400201 - Chemical & Physicochemical Properties

Citation Formats

Olsen, D K, and Josephson, C B. Carboxymethylated ethoxylated surfactants: Annual report. United States: N. p., 1987. Web.
Olsen, D K, & Josephson, C B. Carboxymethylated ethoxylated surfactants: Annual report. United States.
Olsen, D K, and Josephson, C B. 1987. "Carboxymethylated ethoxylated surfactants: Annual report". United States.
@article{osti_6253327,
title = {Carboxymethylated ethoxylated surfactants: Annual report},
author = {Olsen, D K and Josephson, C B},
abstractNote = {A method of selecting surfactants for chemical enhanced oil recovery using carboxmethylated ethoxylated surfactants (CES) is described. Structure/performance correlations for hydrophobe, ethylene oxide content, and nonionic-anionic ratio have been developed for a series of CES with alkane carbon number, pH, salinity, phase inversion temperature, and solubilization parameter to provide a guide in selecting candidate surfactants for enhanced oil recovery. Carboxymethylated ethoxylated surfactants are a class of surfactants that generate low interfacial tension against crude oils at high temperatures, high salinities and high divalent ion concentrations. Selection of the surfactant for a specific reservoir can be made based upon determination of the phase inversion temperature (PIT) of the surfactant at reservoir salinity with live crude. An additional scan for phase behavior (salinity scan) can then establish salinity tolerance and solubilization parameters for the selected surfactant system. Correlations of PIT with surfactant structure, salinity, and hydrocarbon have been determined for a number of US reservoirs using CES as the only surfactant. 67 refs., 20 figs., 3 tabs.},
doi = {},
url = {https://www.osti.gov/biblio/6253327}, journal = {},
number = ,
volume = ,
place = {United States},
year = {1987},
month = {8}
}

Technical Report:
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