OREANDA-NEWS. August 10, 2009.
Oil production
The production of the oil companies in the Republic of Tatarstan amounted to 2,773.6 thousand tons of crude oil in July and it amounted to 18,840.5 thousand tons during the period of seven months of the year, reported the press-centre of TATNEFT.

OAO TATNEFT produced 2,202,061 tons of crude oil in July and 14,994,626 tons during the period of seven months of the year with the above-the-plan production amounting to 248,940 tons (101.7% to the plan).

All NGDUs fulfilled the plans of crude oil production. The amount of 14,985,260 tons of oil was delivered with the above-the-plan delivery amounting to 615,640 tons.

Drilling
The total penetration during the period of seven months of 2009, taking into account OOO Lenburneft, amounted to 347 thousand meters during the period of 7 months of the year: для 298 thousand meters for OAO TATNEFT including 278 thousand meters of production drilling and 20 thousand meters of exploratory drilling; 23 thousand meters for the subsidiary companies of OAO TATNEFT, including 6 thousand meters of production drilling and 17 thousand meters of exploratory drilling; and 26 thousand meters for the joint ventures and independent oil companies, including 21 thousand meters of production drilling and 5 thousand meters of exploratory drilling.

211 wells were constructed and handed over to customers and out of this amount 179 wells were constructed for OAO TATNEFT, including 163 production wells with a number of exploratory wells amounting to 16; 10 wells were drilled for the subsidiary companies of OAO TATNEFT including 5 production wells and 5 exploratory wells; 22 wells were constructed for the joint ventures and independent oil companies, including 15 production wells and 7 exploratory wells.

38 crews of OOO Bureniye Company performed well drilling operations with application of traditional drilling techniques during the period of seven months.

They penetrated 322,529 meters and handed over 201 wells to the customers. Besides one drilling crew performed works on construction of wells drilled in the underbalanced pressure mode for NGDU Bavlyneft. Eight drilling crews operated in the Samara District. 30 thousand meters were penetrated outside the Republic of Tatarstan. 55.6 thousand meters were penetrated in horizontal wells and multilateral downhole splitters.

Penetration per one drilling crew amounted to 8,433 meters during the period of seven months.

Drilling operations of OOO Lenburneft with application of traditional drilling techniques were performed by 4 drilling crews. 24,017 meters were penetrated during the period of seven month with 19,774 meters drilled for OAO TATNEFT and 8 wells handed over to NGDU Leninogorskneft. One crew was drilling a well for Krasnoyarskgazprom Company in the Krasnoyarsk Area, while two crews were drilling wells for NGDU Leninogorskneft and one drilling crew performed drilling operations to the bituminous deposits at Ashalchinskoye field of NGDU Nurlatneft.

11 crews were engaged in drilling lateral and horizontal wellbores with 7 of them drilling horizontals and laterals for NGDUs of OAO TATNEFT and 4 crews performed drilling for outside companies in the territory of the Orenburg District. 17,157 meters were penetrated during the period of seven months and 51 wells were handed over to the customers, including 9,959 meters drilled for OAO TATNEFT with 37 wells handed over.

Workovers and EOR
900 well remedial operations were performed in July 2009 and 5,519 well remedial operations were performed during the period of seven months

The workover operations were performed at 1,196 wells during the period of seven months of the year (177 wells in July), including production string sealing in 176 wells; shutting-off individual layers and recompletion in other intervals in 235 wells; transfer of the wells into different categories and wells completion for injection in 94 wells; failure liquidation and cleaning of the electrical cable and the bottom hole areas in 173 wells; physical well abandonment and re-abandonment in 17 wells.

298 wells were worked over with application of coil tubing (46 wells in July), including 101 wells worked over through the annulus.

Hydrofracking operations were performed at 75 wells (4 wells in July) with cumulative incremental oil production amounting to 2,774 thousand tons.

28 slim holes were drilled and completed for OAO TATNEFT and the small independent oil companies. Drilling of one well is on the way in NGDU Leninogorskneft at present and four wells are in the process of drilling for OOO Bytex.

Works on oil recovery enhancement were performed at 1,031 wells (181 wells in July) including chemical treatment methods applied at 590 wells (106 wells in July).

The incremental oil production resulting from application of the enhanced oil recovery methods amounted to 2,992 thousand tons with chemical methods accounting for the production in the amount of 1 429 thousand tons.

Operations for preparation and delivery of acid compositions were carried out at 1,055 wells during the period of seven months of 2009 while the production of chemical products amounted to 17 thousand 789 tons for the amount of 388 million rubles.