OREANDA-NEWS. March 21, 2011.
Oil Production
TATNEFT produced 1,989,516 tons of crude oil in February or 100.25% with regard to February of 2010. Produced volume for two months amounted to 4,191,032 thousand tons, which was 8.6 thousand tons more than in 2010 (100.2%) with the above-the-plan production in the amount of 85,078 т (102.1%), reported the press-centre of TATNEFT.

The amount of 39,354 tons of crude oil (101.8% to the plan) was produced from the fields of TATNEFT Group of Companies in the territory of the Russian Federation outside the Republic of Tatarstan

Drilling
Traditional Drilling
The total penetration of new drilling for two months of 2011 amounted to 83.4 thousand meters (114.2 thousand meters in 2010):

- 69.9 thousand meters were drilled for TATNEFT (97.4 thousand meters in 2010), including 69.9 thousand meters of production drilling;

- 6 thousand meters (4.8 thousand meters in 2010) were drilled for TATNEFT’s subsidiaries, including 5.8 thousand meters of production drilling and 0.2 thousand meters of exploratory drilling;

- 7.5 thousand meters (12 thousand meters in 2010) were drilled for independent oil companies, including 5.9 thousand meters of production drilling and 1.6 thousand meters of exploratory drilling.

Totally 56 wells (71 wells in 2010) were constructed and handed over to the customers:

- 32 wells (37 wells in 2010) were drilled for TATNEFT with 32 production wells;

- 4 wells (3 wells in 2010) were drilled for TATNEFT’s subsidiaries, including –3 production wells and –1 exploratory well;

- 20 wells (–31 wells in 2010) were drilled for independent oil companies, including –19 production wells and 1 exploratory well.

Drilling in the operating well stock

Total penetration of sidetracking and horizontal wellbores for two months of 2011 amounted to 6.9 thousand meters (4.1 thousand meters in 2010):

- 5 thousand meters (2.7 thousand meters in 2010) were penetrated for TATNEFT,

- 1.9 thousand meters (1.4 thousand meters in 2010) were drilled for independent oil companies.
Totally 8 wells were delivered to the customers (9 wells in 2010):

- 6 wells (6 wells in 2010) were delivered to TATNEFT;

- 2 wells (3 wells in 2010) were delivered to independent oil companies

36 drilling crews performed traditional well drilling operations in 2011. 10 drilling crews were engaged in sidetrack penetration and drilling horizontal wellbores. Penetration per one crew amounted to 2,308 meters in 2011, while in 2010 the penetration per crew amounted to 2,577 meters.

5.8 thousand meters were penetrated outside the Republic of Tatarstan. 9.7 thousand meters were penetrated in horizontal wells and multi-branched downhole splitters.

Well Repairs
645 well remedial operations were performed in February 2011 with a number of well remedial operations performed during two months amounting to 1,279, which is 10.3% less, than in 2010 (1,426 wells during 2 months of 2010), including 1,064 jobs at production wells, or 12.6% less than during the similar period of 2010 (1,217 wells during 2 months of 2010).

5 well remedial operations were performed in Tatneft-Samara and 2 wells were repaired in Tatneft-Severny (12 well remedial jobs were performed in Tatneft-Samara during 2 months of 2010).

The workover operations were performed at 384 wells during two months of 2011 (228 wells in February), including: production string sealing in 61 wells; shutting-off individual layers and recompletion in other intervals in 34 wells; transfer of wells into different categories and the wells completion for injection in 16 wells; failure liquidation and cleaning of the electrical cable and bottom hole areas in 33 and physical liquidation and re-liquidation in 7 wells.

126 wells were worked over with application of coil tubing (80 in February), including 28 wells worked over through the annulus.

Formation hydrofracking operations were performed in 43 wells (27 in February), which makes 30% more, than during the similar period of 2010 (33 wells during 2 months of 2010). The cumulative incremental crude oil recovery amounted to 3,729 thousand tons.

5 small diameter holes were drilled and completed for TATNEFT during the mentioned period. At present drilling of one slim hole is on the way for each of NGDUs: Almetyevneft, Prikamneft and Leninogorskneft, and completion of one hole for NGDU Prikamneft is in progress.

Works on oil recovery enhancement were performed at 342 wells (208 wells in February), including chemical treatment methods applied at 214 wells (123 wells in February).

The incremental oil production resulting from application of the enhanced oil recovery methods amounted to 836 thousand tons, with the chemical methods accounting for the production of 413 thousand tons.

Bottom hole zone treatment operations with application of TATNEFT’s technologies were performed at 462 wells.