OREANDA-NEWS. November 09, 2011.
Crude Oil Production
The amount of 2,768,289 tons of crude oil was produced in the Republic of Tatarstan in October with the production for ten months amounting to 27,107,807 tons or 100.2 percent versus the same period of the last year (+53.6 thousand tons), reported the press-centre of TATNEFT.

TATNEFT produced 2,202,359 tons of crude oil in October with the production in the amount of 21,595,297 tons from the beginning of the year accounting for 45.6 thousand tons increase versus 2010 (100.2 percent) with the above-the-plan production volume amounting to 439,690 tons (102.1 percent). 20,922,621 tons of oil were delivered with the above-the-plan delivery amounting to 217,881 tons.

The amount of 21,812,943 tons of crude oil was produced from the fields of TATNEFT Group of companies with the above-the-plan production amounting to 446,272 tons (102.1 %).

Drilling
Traditional Drilling
The total penetration of new drilling for ten months of 2011 amounted to 518.8 thousand meters (539.7 thousand meters in 2010). Of this amount 408.2 thousand meters (in 2010 431.6 thousand meters) were penetrated for TATNEFT, including 400.6 thousand meters of production drilling and 7.6 thousand meters of exploratory drilling. The penetration for subsidiaries of OAO TATNEFT amounted to 36.7 thousand meters (21.4 thousand meters in 2010), including 32.6 thousand meters of production drilling and 4.1 thousand meters of exploratory drilling.

Totally 340 wells (361 wells in 2010) were constructed and delivered to the customers, including 256 wells (268 wells in 2010) delivered to TATNEFT, including 255 production wells and 1 exploratory well. 29 wells (10 wells in 2010), including 26 production wells and 3 exploratory wells were constructed and delivered to the subsidiaries of TATNEFT.

Active Well Stock Drilling
The total penetration of sidetracking and horizontal wellbores drilling for 10 months of 2011 amounted to 37.6 thousand meters (27.9 thousand meters in 2010), including 18.3 thousand meters (16.9 thousand meters in 2010) drilled for TATNEFT.

Totally 81 wells (76 wells in 2010) were delivered to the customers with 51wells (50 wells in 2010) delivered to TATNEFT.

36 drilling crews performed traditional well drilling operations in 2011. 10 drilling crews were engaged in drilling lateral wellbores and lateral horizontal wellbores. The penetration per crew in 2011 amounted to 14,761 meters, while in 2010 the penetration per crew amounted to 14,461 meters.

53.4 thousand meters were drilled outside the Republic of Tatarstan. 54.7 thousand meters were penetrated in horizontal wellbores and bottomhole splitters.

Wells Repair
725 well remedial operations were performed in October of 2011 with the number of the well remedial operations performed during ten months amounting to 6,878 that is 715 wells or 9.4 percent less, than in 2010 (7,593 wells in 10 months of 2010). The number of remedial operations performed at the production wells dropped by 9.2 percent (from 6,261 down to 5,687), the number of injection wells repairs decreased by 5.5 percent (from 889 down to 840).

45 wells have been repaired outside the Republic of Tatarstan since the beginning of the year with 35 wells for Tatneft-Samara and 3 wells for Tatneft-Severny, 2 wells for Ilekneft and 5 wells for ZAO KalmTatneft (42 wells were repaired at Tatneft-Samara during 10 months of 2010).

The workover operations were performed in 2,226 wells during ten months of 2011 (217 wells in October), including: production string sealing was performed in 332 wells; shutting-off individual layers and recompletion in other intervals were performed in 237 wells; transfer of wells into different categories and wells completion for injection were performed in 115 wells; failure liquidation and cleaning of the production string and bottom hole zone were carried out in 211 wells; physical liquidation and re-liquidation were carried out in 31 wells.

700 wells (65 wells in October) were worked over with application of coil tubing, including 120 wells worked over through the annulus.

Formation hydrofracking operations were performed in 270 wells (29 wells in October), which was 31 percent more, than for the similar period of 2010 (206 hydrofracking jobs for 10 months of 2010). The cumulative incremental crude oil recovery volume amounted to 5 million 335 thousand tons.

36 small diameter holes were drilled and completed for TATNEFT during ten months of 2011. At present drilling of one slim hole is in progress for NGDU Nurlatneft, one slim hole for NGDU Yamashneft and one slim hole for NGDU Almetyevneft.

Oil recovery enhancement operations were performed in 2,020 wells (212 wells in October) with chemical treatment methods applied in 1,143 wells (126 wells in October).

The incremental oil production volume resulting from application of the enhanced oil recovery methods amounted to 4 million 485 thousand tons of crude oil with the chemical methods accounting for the production of 2 million 108 thousand tons.

Bottomhole area treatment operations with application of TATNEFT's technologies were performed in 2,778 wells during ten months of 2011.