Lately there has been a growing interest in the development of bitumen fields in the world. The Republic of Tatarstan has significant reserves of high-viscosity oils and natural bitumen, which in the future may become an alternative to conventional oil. Undoubtedly, one of the most promising strategic directions of development of fields with hard-to-recover reserves is their development by horizontal wells. For fields and deposits of elongated shape, when the length of the deposit exceeds its width several times, the most expedient is drilling of a heat-injection well with a sinusoidal horizontal section relative to the general direction of the deposit.