Procedure and PC soft-wear are developed for locating reduction or rising trends on the basis of pulsating oil production curves. Presented are, in particular, equations for calculation of oil rates reduction factors before and after geological-technological measures, and, also, for geological-technological measures technological efficiency evaluation. Reviewed is the course of their economic efficiency calculation. It is stated, that proposed procedure could act as reliable means for determination of expected geological-technological measures efficiency and correction of their actual efficiency evaluation, obtained on the basis of displacement parameters.