<![CDATA[The need of EOR techniques in the late field production period is essential to get thethird wind of incremental oil. Chemical injections are proven technologies not only at thelaboratory scale but also at the field scale which have been implemented in many parts ofthe world. Surfactant is an important Chemical in this technology, which mostly has beenused to rednce the capillary trap of the oil in the reservoirs. The selection of surfactant type which is suitable for a specific oil field to increase theoil production should fulfill the selection criteria. Laboratory works firstly should be doneto evaluate the important properties based on the industrial Standard procedures. Theselaboratory tesis include compatibility test, aqueous stability test, phase behavior study,micro-emulsion viscosity interfacial tension determination, thermal stability test. and fil-tration test]]>
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