The geological service of Oil and Gas Production Department Komsomolskneft of Surgutneftegas OAO introduces new technologies, which often have no analogues in Russia. There are technologies of underbalanced drilling elongations and branches using coiled tubing equipment (continuous pipe) and drilling multilateral wells among them. Horizontally branched boreholes drilling allow to increase zonally the oil recovery factor, ensuring a more efficient inflow of oil from the reservoir and, in general, improving the quality of field development management.
The article presents new well construction technologies, used in Komsomolskneft, including at drilling additional boreholes in operated wells. Based on the existing experience in the construction of wells, a brief overview of the main designs and schemes of the used technologies is given: multilateral and multihole wells drilled using various methods of exposing producing horizons. The analysis of advantages and disadvantages of well designs used in the developed fields is performed. Recommendations are given on the choice of methods and their combinations, taking into account the geological features of the operation objects structure. The efficiency of construction of multilateral and multihole wells is substantiated due to reduction of the operating well stock, which is to construct on the developing fields. The actual data on yield of wells of various designs depending on the measure action duration are given.
