It is noted that standard methods of acid treatments do not allow to extract significant oil reserves of reservoirs under development. One of the ways to improve the efficiency of acid treatments of reservoirs at a late stage of development is the use of complex compounds. Complex additive to the Katol 22A acid is developed and tested by Mirrico Group at the fields of Bashneft JSOC. The effectiveness of treatments in the presence of Katola 22A on average is 80-90 %.
Key words: hydrochloric acid treatment, the intensification of oil production, complex surfactants.
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