Use of surfactants to enhance oil recovery of formations with hardly-recoverable oil reserves
Some specific features of extraction of hardly-recoverable oil reserves are considered in the present article. Some physical-chemical methods of enhancement of oil recovery (PhCh EOR) as a promising technique of enhancing oil recovery of formations with hardly-recoverable oil reserves are described. It is shown that the use of surfactants that are part of any technology of residual oil after-washing is most preferable in terms of maintaining the reservoir properties of productive formations. The results of PhCh EOR technique application at Yuzhno-Yagunsky oil field served the basis for giving recommendations that provide essential enhancement of oil reserves recovery at the oil fields of Territorial Industrial Enterprise (TIE) "Kogalymneftegas" even using the existing range of chemical compositions of formation stimulation when used correctly.