OREANDA-NEWS. November 11, 2010. Oil Production. TATNEFT produced 2,202,863 tons of crude oil in October with the above-the-plan production in the amount of 45,554 tons (102.1%), reported the press-centre of TATNEFT.

The volume of crude oil produced by TATNEFT from the beginning of the year amounted to 21,549,709 tons accounting for 21,784 tons surplus compared to the amount of 2009 (100.1%). Above the-plan-production amounted to 394,781 tons of crude oil (101.87%). The amount of 21,074,664 tons of crude oil was delivered with the above-the-plan delivery amounting to 382,844 tons.

Drilling. New Drilling. The penetration during a ten months period of 2010 amounted to 539.7 thousand meters (463.2 thousand meters in 2009):

- 431.6 thousand meters were drilled for TATNEFT (370 thousand meters in 2009), including 413.2 thousand meters of production drilling and 18.4 thousand meters of exploratory drilling;

- 21.4 thousand meters were drilled for TATNEFT subsidiaries and affiliated companies (32.2 thousand meters in 2009), including 7.2 thousand meters of production drilling and 14.2 thousand meters of exploratory drilling;

- 86.7 thousand meters (61 thousand meters in 2009) were drilled for joint ventures and independent oil companies, including 76 thousand meters of production drilling and 10.7 thousand meters of exploratory drilling..

Totally 361 wells (307 wells in 2009) were constructed and handed over to customers:

- 268 wells (247 wells in 2009) were drilled for TATNEFT with 259 production wells and 9 exploratory wells;

- 10 wells (17 wells in 2009) were drilled for TATNEFT's subsidiaries and affiliated companies with 7 production wells and 3 exploratory wells;

- 83 wells (43 wells in 2009) were drilled for joint ventures and independent oil companies, including 76 production wells and 7 exploratory wells.

Drilling in the Old Well Stock

Penetration of sidetracking and horizontal wellbores for ten months of 2010 amounted to 27.9 thousand meters (25.2 thousand meters in 2009), including:

- 16.9 thousand meters were penetrated for TATNEFT (16.4 thousand meters in 2009),

- 11 thousand meters were drilled for joint ventures and independent oil companies (8.8 thousand meters in 2009).

Totally 76 wells were delivered to the customers (69 wells in 2009), including:

- 50 wells were delivered to TATNEFT (51 wells in 2009);

- 26 wells were delivered to joint ventures and independent oil companies (18 wells in 2009).

38 drilling crews performed drilling of new wells in 2010. 9 drilling crews were engaged in sidetrack penetration and drilling horizontal wellbores. Penetration per one crew in new drilling amounted to 14,461 meters in 2010, while in 2009 the penetration per crew amounted to 12,011 meters.

23.9 thousand meters were penetrated outside the Republic of Tatarstan. 61 thousand meters were penetrated in horizontal wells and multi-branched downhole splitters.

Well Repairs
748 well remedial operations were performed in October 2010 and 7,284 remedial operations were performed during the period of ten months, i.e. 781 wells or 9.7% less then in 2009 (8,065 wells during 10 months of 2009).

41 well repair operations were performed in Tatneft-Samara from the beginning of the year, including 20 well remedial operations and 21 workover operations (36 well repairs in 2009).

The workover operations were performed at 2,224 wells during a ten months period of 2010 (216 wells in October, 1,721 wells in 10 months of 2009), including: production string sealing in 352 wells; shutting-off individual layers and recompletion in other intervals in 251 wells; transfer of wells into different categories and the wells completion for injection in 129 wells; failure liquidation and cleaning of the electrical cable and bottom hole areas in 291 wells and physical liquidation and re-liquidation in 34 wells.

722 wells were worked over with application of coil tubing (69 wells in October), including 183 wells worked over through the annulus.

Formation hydrofracking operations were performed in 206 wells (20 wells in October. 106 wells for 10 months of 2009). The cumulative incremental oil recovery amounted to 3,572 thousand tons.

22 slim holes has been drilled and completed for TATNEFT from the beginning of the year. Two crews perform well drilling at present with one of them drilling at NGDU Yamashneft, while another one performs drilling operations at NGDU Prikamneft.

Works on oil recovery enhancement were performed at 1,991 wells (200 wells in October. 1,463 wells for 10 months of 2009), including chemical treatment methods applied at 1,168 wells (119 wells in October and 844 wells for 10 months of 2009).

The incremental oil production resulting from application of the enhanced oil recovery methods amounted to 4 million 434 thousand tons (103% to the plan, 4,291 thousand tons for 10 months of 2009) with the chemical methods accounting for the production of 2 million 135 thousand tons (103% to the plan, 2,053 thousand tons for ten months of 2009).