SHARE OF HORIZONTAL WELLS IN THE TOTAL NUMBER OF COMMISSIONED WELLS
GROWTH IN DEVELOPMENT DRILLING RATE
Hydrocarbon production amounted to 254.2 mmtoe in 2015, which was 1 % higher year-over-year. Crude oil and hydrocarbon liquid production was at 202.8 mmt in 2015.
The Company continued to stabilize its production in mature fields. In 2015, it completed large-scale optimization of the current systems in order to improve the efficiency of field reserve production in West Siberia by shifting from conventional directional drilling to drilling of horizontal wells with multi-stage fracturing (MSF HW). This technology significantly improves well productivity, reserves recovey ratio, reduces the well stock, and increases project feasibility. MSF HW is actively used at five consolidated brownfields of the Company, including Yuganskneftegaz, Purneftegaz, Samotlorneftegaz, Nyaganneftegaz, and Varyeganneftegaz. About 50 % of the developed reserves at the aforementioned subsidiaries were started up driven by the use of MSF HW. The approaches and technologies used by Rosneft during the development of its fields in West Siberia secured its leadership in new well launching efficiency.
The Company increased its production drilling rate by 36 % to 6.9 million m in 2015 and started up 1839 new wells (+15 % YOY).
The rates of well stock rebuild by sidetracking also increased. In 2015, over 1000 wells were rebuilt that way which was more than 44 % above the 2014 level. That helped the Company to additionally produce more than 2.6 mmt of oil (+15 % YOY). Rosneft keeps its accelerating introduction of more efficient options for new well completion. In 2015, the implementation of horizontal wells with multi-stage fracturing increased by more than 30 % year-over-year. The number of horizontal wells increased by more than 24 % to 555 wells, making up 30 % of the total number of completed wells.