The article presents the results of laboratory and experiment-industrial tests of compositions of  nanodemulsifiers ²IKHLAS²-1–42 (based on high- and low-molecular surfactants) on the oil fields "Zhetybai" and "Zhanaozen" the Republic of Kazakhstan. According to the results of industrial test,  concluded that ²IKHLAS²-1 compared with the base demulsifier "Randem"2219,  has a significant technological, environmental and economic advantages. Therefore, nanodemulsifier "IKHLAS"-1 was recommended by us (with an optimal dose of ~160 g/t) for a broad introduction at the oil-field "Zhetybaymunaygaz", as well as in other similar oil-fields, in which there are problems, during primary preparation of   stable oil emulsions.