A scheme for enhancing oil recovery by heat and gases evolved in the controlled reactions of a binary mixture (BM) in wells and the reservoir has been considered. A comparative analysis of involvement of the decomposition reactions of inorganic (ammonium) and organic (monoethanolamine (MEAN) [HO-CH2-CH2-NH3](+)[NO3](-)) nitrates in this process has been performed. According to calculation results, gas evolution is higher and heat release is lower for MEAN, rather than ammonium nitrate, at a high temperature and the other way around at low temperatures. A field experiment and calculations also have shown that (a) the BM technology can become an alternative to the conventional steam-flooding technology of enhanced oil recovery; (b) an opportunity has been opened for a more resource-saving and cost-effective method of thermochemical elevation of reservoir pressure at an order of magnitude lower reservoir water-flooding rate and a few times higher oil production rate in the gas lift mode; and (c) a necessary and sufficient condition for the successful application of BMs is the existence and functioning of the system of continuous monitoring of bottomhole temperature and pressure in the reaction zone.