Rn. Mukhametzyanov et al., USE OF A SETTLING COMPOSITION AND SURFACT ANTS FOR EOR FROM HIGH-TEMPERATURE HETEROGENEOUS BEDS, Neftanoe hozajstvo, (7), 1994, pp. 21-22
The paper suggests a technology for oil displacement by surfactant sol
utions, preceded by plugging of high water-cut bed intervals. Laborato
ry studies offered the recipes for settling compositions based on low-
cost and broadly available metal salts and carbamide. The efficiency o
f this surfactant/settling-agent injection technology has been proven
in Noyabrsk region oilfields.