Ultrasonic automated oil well complex and technology for enhancing marginal well productivity and heavy oil recovery

Abstract

An ultrasonic automated oil well complex is developed that includes an ultrasonic oil well module MSUM based on magnetostrictive transducers, an ultrasonic oil well module MSUP based on piezoceramic transducers, and a workstation. The developed complex makes it possible to control and record the parameters of ultrasonic modules MSUM and MSUP and to collect information on the parameters of the near-wellbore area during the sonochemical treatment of oil formations under different geological and technical conditions. The field tests of the complex in the wells of the Samotlor oil field (Western Siberia) have shown that after sonochemical stimulation of the near-wellbore region the average increase in the daily production rate of oil wells is 5.2 tons per day, the increase in the well productivity index is on average 107%, and the decrease in the water cut of the well fluid is on average 28%. The fundamentally new advantages of the technology are as follows: the simplicity of application (it is not more complex than the geophysical study of wells), the possibility of introducing the reagents of various chemical natures into the near-wellbore area, the selectivity of treatment, the absence of a negative effect on the production string and the cement sheath, environmentally friendly, and the absence of a negative impact on the health of operators. The developed oil well complex and sonochemical technology are offered to oilfield service companies for stimulating low-productivity wells and heavy oil production.