Most oilfields have complex geological structure and low production. Even though they are multilayered and characterised bydepleted reservoir energy, they have a considerable amount of remaining oil in place. That is why developing of efficient methods of bedstimulation for achieving the highest recovery of reserves is up-to-date scientific and manufacturing task.To provide increasing of oil production volumes from multilayered formations, it was proposed to single out separate developmenttargets by means of employing dual completion technology, which gives an opportunity to develop several objects with different reservoircharacteristics, fluid composition and occurrence depth by a single well pattern more efficiently. Operational benefit from employing dualcompletion technology is estimated by additional oil production volume from the inclusion of new operation facility to a well according tocurrent well operating conditions. Appraisal of technological acceptability of dual completion on oilfields is proposed, calculations of thetechnological effectiveness of the introduction of dual completion technology are carried out. Dual completion implementation expediencywas proved from technology viewpoint due to increasing of formation coverage and well density grid without drilling additional wells,recovery of undrained retained oil in reservoirs of complex structure and increasing of ultimate oil recovery factorExamined dual completion technology and dual completion assembly allow decreasing of capital expenditures on drilling of new wellsand accelerating oilfield development rate. In addition, they allow increasing of oil recovery factor as well as oil production. Failures ofdual completion equipment are observed, and recommendations for decreasing causes of failures are given.The problem of asphaltene-paraffin-resin deposition (APRD) is becoming more and more important due to the transition of manyoilfields to the closing stage of oilfield development. The process of APRD forming is determined by many factors, which include exploitationconditions of technological equipment during production and oil properties. Known methods which are preventing dual completion oilequipment from APRD do not allow solving of the problem. That is why a need for deposit removal stays topical. By influencing on nature ofinteraction of asphaltene, paraffin and resin, we can control structure formation in oil system
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