chemical EOR operations

Chemical-enhanced oil recovery methods mainly include micellar/polymer flooding,alkaline flooding, polymer flooding, and combinations of two or all of the three methods. Extensive studies of these processes have found that successful chemical flooding needs to be able to efficiently lower the oil/water interfacial tension and to have very good mobility control.The displacement mechanism of an ASP flood is similar to that of micellar/polymer flooding except that much of the surfactant is replaced by low-cost alkali.Therefore, the overall cost is lower even though the chemical slugs can be larger.Polymer is usually incorporated in thelarger dilute slug.It has been recognized that oil recovery can be greatly improved by the synergism of chemicals used in the ASP ulations.

Keywords:

CHEMICAL-ENHANCED , ASP FLOOD , SURFACTANT , IMBIBITION TEST , RECOVERY