West Siberia is the Company’s main oil producing region. In 2015, West Siberian assets accounted for 64 % of the Company’s total oil production. The Company’s main producing assets in West Siberia include RN-Yuganskneftegaz LLC (31 % of the total production), JSC Samotlorneftegaz (10% of the total production) in Khanty-Mansiisk Autonomous District and Uvatneftegaz LLC (5 % of the total production) in the south of the Tyumen Oblast.
West Siberia is also a major gas producing region. Gas production in the Company grew by 5 %, or 2.1 bcm, to 44.5 bcm in 2015.
ALL-TIME HIGH RATE OF PRODUCTION DRILLING AT RN-YUGANSKNEFTEGAZ
RN-Yuganskneftegaz LLC operates 32 license areas (Rosneft being the subsoil user). Most proven reserves (84 %) are concentrated in the Priobskoye, Mamontovskoye, Malobalykskoye, and Prirazlomnoye fields.
Hydrocarbon production in 2015 approximated 66 mmtoe with oil production being about 62.4 mmt.
Production is maintained by increasing development drilling amount and additional well work.
A new historical record was set in terms of development drilling in 2015. More than 3.5 million meters of rock were drilled. The growth amounted to 59 % year-over-year. 901 new wells were commissioned (+23 % YOY).
The Company’s average daily oil production has stabilized since February: the decrease in daily average oil production reduced from 4.3 % in 2014 to 0.9 % in 2015.
The Company’s strategic goal is further stabilization of production with growth in mid-term.
JSC Samotlorneftegaz operates 10 license areas (being the subsoil user of nine of them). Most proven reserves (over 97 %) are concentrated in the Samotlorskoye field, one of the world’s largest fields (with a production peak at 150 mmt at Samotlor in 1980s).
Hydrocarbon production in 2015 approximated 25.7 mmtoe with oil production being about 21 mmt. The main objectives aimed at maintaining production in the field are utilization of cutting-edge technologies and start-up of new undeveloped reserves.
In December 2015, JSC Samotlorneftegaz completed experimental drilling of a new horizontal well drilled in the Samotlor license are using 20 fracturing stages during 23 days. Hydraulic fracturing with MSF burst port collars and cup packer was done by an intergroup contractor. The well proved to be efficient. Its oil flow rate was more than three times above the average starting flow rate for new Samotlorneftegaz wells in 2015 and more than twice higher than that of neighboring wells in the area. Long-term prospects include drilling of formation edge zones where non-utilized oil reserves of over 100 mmt are concentrated.
Samotlorneftegaz conducted pilot testing of the technology involving hydraulic fracturing sleeve activation with soluble balls in the wells applying multi-stage fracturing (MSF GW). The new technology contributes to a significant reduction of the periods of each well development from 18 to seven or eight days.
The use of soluble balls jointly with complete proppant flushing makes the port drilling stage unnecessary during development. The use of the new technology helped to ramp up an experimental well in the Samotlorskoye field within 24 hours and supported a yield of 105 cubic meters per day with a water cut within 10 %.
RN-Uvatneftegaz LLC operates 16 license areas (being the subsoil user of 13 of them). Most of its proven reserves (over 80 %) are currently concentrated in the Ust-Tegusskoye and Urnenskoye fields developed as part of the Eastern Development Center.
Oil production in 2015 exceeded 11 mmt, which was 10.8 % above the 2014 level.
RN-Uvatneftegaz started up three new fields in 2015 (Protazonovskoye, South Gavrikovskoye, and Malyk fields) and started commercial drilling in the West Epasskoye field as part of the creation of the Eastern Development Center in the south of the Tyumen Region. Oil production in this field is expected to start in early 2016.
Drilling operations required transportation of a heavy rig to the West Epasskoye field. That was done in extreme swamp conditions of the Uvatsk District during a short summer and took 35 days.
RN-Uvatneftegaz is consistently improving drilling performance by using new methods and technologies which were previously tested during the development of the existing fields.
AGGREGATE OIL PRODUCTION AT THREE MAJOR NEW PROJECTS, REACHING THE PRODUCTION PEAK
East Siberia is home to the Company’s major new producing assets. 2015 was a record production year in the Vankor and Verkhnechonskoye fields with over 30 mmt of total output. The region will support major production growth in the medium term driven by the development of new fields in the Vankor cluster, Urubcheno-Tokhomskoye, Srednebotubinskoye, and Kuyumbinskoye fields.
Gas production in the region in 2015 grew by 62 %, or 3.4 bcm, to 8.9 bcm. Gas production growth of 3.4 bcm was mainly concentrated in the Vankor field and was the result of an increase in production and higher utilization of associated petroleum gas at 88 % (vs 61 % in 2014) driven by the start of gas treatment and transport to Gazprom’s unified gas supply system (UGSS) in April 2014.
JSC Vankorneft develops the Vankor oil, gas, and condensate field which is the largest field discovered in the last 20 years.
Hydrocarbon production exceeded 29 mmtoe with oil production being over 22 mmt.
110 MILLIONTH TON OF OIL WAS PRODUCED ON October 08, 2015 SINCE VANKOR FIELD DEVELOPMENT HAD BEEN STARTED IN 2014.
In 2015, the Company continued to enhance its production efficiency at the field. A horizontally branched well with 10 holes was launched in 2015, with initial flow rate at 310 tpd. This indicator is two times higher than the productivity of nearby horizontal wells. A total of four branched wells were started in Vankor. The total cumulative length of horizontal sections reached 1994 meters with a total borehole length of 4450 meters. The new technology boosts overall efficiency and production of additional oil and gas reserves in comparatively low permeability and porosity values. Branched wells represent a promising technology both at the Vankor field and other Vankor cluster fields (Suzunskoye, Tagulskoye, and Lodochnoye). All of the above will contribute to an increase in the oil recovery factor and overall projects efficiency.
Verkhnechonskneftegaz explores and develops the Verkhnechonskoye oil, gas, and condensate field, which is the second largest field in East Siberia, located in the Irkutsk Region.
Oil production exceeded 8.6 mmt in 2015, which was 5.4 % above the 2014 level. Production growth was supported by the implementation of a production drilling program and intensification of production in the base stock.
IN 2015, THE COMPANY REACHED THE HISTORICAL DAILY PRODUCTION MAXIMUM OF 23.7 KT AT THE VERKHNECHONSKOYE FIELD BY OPTIMIZING THE INFRASTRUCTURE.
Such results were achieved owing to efficient well work, optimization of the drilling cycle, construction of new wells and monitoring of pay zone parameters. The hydraulic fracturing program for the base stock facilitated an increase in well efficiency. The development of the field onshore infrastructure was a significant contribution to production increase. The rebuild of the oil treatment unit increased its throughput by 25 % from the design capacity and the start-up of an oil pipeline contributed to the significant growth of oil transportation volumes.
PJSC East Siberian Oil and Gas Company (Vostsibneftegaz)
PJSC East Siberian Oil and Gas Company (Vostsibneftegaz) develops an expanded priority area in the Urubcheno-Tokhomskoye field located in the Evenkiysky District in the Krasnoyarsk Territory. Field development plans suggest annual oil production plateau at 5 mmt.
Natural oil flow output from 164 to 517 tpd were received upon testing 8 horizontal development wells in 2015.
OJSC Taas-Yuriakh Neftegazodobycha
THE TWO MILLIONTH TON OF OIL WAS PRODUCED ON DECEMBER 02, 2015 IN THE SREDNEBOTUBINSKOYE FIELD SINCE THE START OF PRODUCTION IN OCTOBER 2013.
OJSC Taas-Yuriakh Neftegazodobycha develops the Srednebotubinskoye field located in the Mirinskiy District of the Sakha Republic (Yakutia).
Field development plans suggest annual oil production plateau at 5 mmt. Oil and gas condensate production amounted to 921,000 t in 2015.
VOLGA URALS REGIONS
OF PRODUCTION AT CERTAIN VOLGA-URAL FIELDS
The Volga Urals Region is one of Rosneft’s historical production centers in the Russian Federation. Some fields have been developed for about 80 years. In 2015, the Company’s’ production in the region totaled 33.4 mmt,
or 18 % of the Rosneft total production.
In 2015 gas production in the region was at 3.2 bcm remaining at about the 2014 level. Most gas is produced
at the fields of OJSC Orenburgneft and OJSC Samaraneftegaz.
OIL PRODUCTION GROWTH AT RELATIVELY MATURE FIELDS OF SAMARANEFTEGAZ
JSC Samaraneftegaz operates 161 license areas (being the subsoil user of 160 of them). About half of all proven reserves is concentrated in 10 major fields, including Mukhanovskoye, Kuleshovskoye, Barinovsko-Lebyazhinskoye, Mikhailovsko-Kokhanskoye, Neklyudovskoye and others.
Hydrocarbon production approximated 12.5 mmtoe in 2015. Hydrocarbon liquids production increased by 5.3 % to
12.1 mmt. The production growth was supported by an increase in the number of new wells and well work. The development drilling, exceeded 340,000 meters of rock in 2015, which was 1.5 times above the 2014 level. 39 % more wells were launched versus 2014 (with initial flow rates remaining unchanged). The wellwork program included hydraulic fracturing, side-tracking, re-commissioning of wells, and well transfer to overlying formations. The maximum wellwork effect was achieved at the South Orlovskoye, Sadovoye, West Kommunarskoye, Nokolso-Spiridonovskoye, Mukhamanskoye, and North Maksimovskoye fields.
The gas program execution involved the start-up of a gas compression station with annual capacity of 72.5 mm cm at in the Gorbatovskoye field, rebuild of the gas pipelines in the South Orlovskoye and Ekaterinovskoye fields and the start of construction of three gas compressor stations in the Kozlovskoye, Sologaevskoye, and Yablonevskoye fields.
PJSC Orenburgneft operates 125 license areas (being the subsoil user of 90 of them). More than half of all proven reserves is concentrated in seven major fields, including Rostashinskoye, Sorochinsko-Nikolskoye, Garshinskoye, Pokrovskoye, and others.
Hydrocarbon production in 2015 approximated 20.4 mmtoe Hydrocarbon liquids production approximated 18.1 mmt. The key goals in maintaining the output of Samaraneftegaz fields are advanced wellwork (including hydraulic fracturing, side-tracking, well re-commissioning, etc.) and optimization of well operation modes.
RUSSIAN FAR EAST (ONSHORE)
RN-Sakhalinmorneftegaz LLC operates 29 onshore license areas (Rosneft being the subsoil user) on Sakhalin Island and three offshore license areas (Rosneft being the subsoil user) in the Sea of Okhotsk with oil exploration and production efforts dating back to the 19th century.
RN-Sakhalinmorneftegaz main proven reserves (about 80 %) are concentrated in five fields, including Odoptu-more, Katamgli, Mongi, Mirzoev, and Nabil. Hydrocarbon production approximated 1.5 mmtoe with oil and gas condensate production being about 1.2 mmt in 2015.
RN-Krasnodarneftegaz LLC operates 31 license areas (Rosneft being the subsoil user) in the Krasnodar Territory, the oldest oil producing region in the European part of the Russian Federation.
RN-Krasnodarneftegaz main proven reserves (about 80 %) are concentrated in the Anastasievsko-Troitskoye field.
Hydrocarbon production approximated 3.1 mmtoe with oil and gas condensate production being about 0.9 mmt in 2015.
IMPLEMENTATION OF THE APG UTILIZATION PROGRAM
The result of gas program implementation in 2015 was the achievement of an APG level of up to 87.9 % (+7.0 p.p. vs 2014). A total of 20 facilities using APG were started up in 2015. The main projects under the program in 2015 were construction and rebuild of the following onshore infrastructure:
- Compression stations for compression of gas at last separation stages — low stage compression station in the Gorbatovskoye field of JSC Samaraneftegaz, BS5 low stage compression station in the Malobalykskoye field of RN-Yuganskneftegaz LLC, compression station of the Ust-Kharampur field of RN-Purneftegaz LLC, compression stations in the Uzunskoye and West Ust-Balykskoye fields of OJSC Slavneft-Megioneftegaz.
- Electricity generation — 10.78 MW GGS in the West Asomkinskoye field, 14.3 MW GGS in the Arigolskoye field of OJSC Slavneft-Megioneftegaz, captive power plant (CPP3) of the Verkhnechonskoye field of Verkhnechonskneftegaz.
- Gas transport infrastructure (gas pipelines) of JSC Samaraneftegaz, RN-Stavropolneftegaz LLC and PJSC Orenburgneft.
Key APG production facilities in 2015
|Asset||APG production, bcm||Key 2015 achievements|
|Vankor cluster||7.7||Further development of the new production area.|
|«Samotlorneftegaz»||5.8||Maintaining utilization of APG at over 95 %.|
|«Purneftegaz»||3.4||Increase in APG production by launching up new wells during 2014.|
|«Yuganskneftegaz»||4.6||Production growth drive by further implementation of utilization of APG program: compression station launching in April 2015 in the Malobalykskoye field.|
|«Varyeganneftegaz»||3.0||Maintaining utilization of APG at over 95 %.|
|«Orenburgneftegaz»||2.1||Further implementation of the program aimed at higher added value use of APG. Gas refining and sale of output products with high added value at Pokrovskoye and Zaikinskoye gas processing plants.|
|«Nyaganneftegaz»||1.5||Maintaining utilization of APG at over 95 %.|