OREANDA-NEWS. September 08, 2011.
Crude Oil Production
The amount of 2,760,659 tons of crude oil was produced in the Republic of Tatarstan in August, while 21,659,492 tons of crude oil have been produced since the beginning of the year accounting for 100.2% versus the same period of the previous year (+51 thousand tons), reported the press-centre of TATNEFT.

TATNEFT produced 2,201,282 tons of crude oil in August, while the production since the beginning of the year amounted to 17,259,814 tons or 44 thousand tons more than in 2010 (100.3%). The above-the-plan production amounted to 349,763 tons (102.1%). 16,871,086 tons of crude oil were delivered with the above-the-plan delivery amounting to 317,866 tons.

17,430,193 tons of crude oil were produced from the fields of TATNEFT Group of companies with the above-the-plan production amounting to 321,741 tons (102.1%).

Drilling
Traditional Drilling
The total penetration of new drilling for eight months of 2011 amounted to 409.6 thousand meters (438.6 thousand meters in 2010), including 336.4 thousand meters for TATNEFT (364.3 thousand meters in 2010). Of this number production drilling amounted to 333.1 thousand meters, and exploratory drilling amounted to 3.3 thousand meters.

Penetration for subsidiaries of TATNEFT amounted to 31.7 thousand meters (14.9 thousand meters in 2010), including 29.9 thousand meters of production drilling and 1.8 thousand meters of exploratory drilling.

Totally 272 wells (295 wells in 2010) were constructed and delivered to the customers, including 209 wells (216 wells in 2010) for TATNEFT with 208 of them being production wells and 1 exploratory well.

24 wells (10 wells in 2010), including 22 production wells and 2 exploratory wells were constructed and delivered to the subsidiaries of TATNEFT.

Active Well Stock Drilling
The penetration of sidetracking and horizontal wellbores for eight months of 2011 amounted to 29.7 thousand meters (23.3 thousand meters in 2010), including 15.1 thousand meters (14.7 thousand meters in 2010) penetrated for TATNEFT.

65 wells (60 wells in 2010) were delivered to the customers with 42 wells (42 wells in 2010) drilled for TATNEFT.

36 drilling crews performed traditional well drilling operations in 2011. 10 drilling crews were engaged in drilling lateral wellbores and lateral horizontal wellbores.

Penetration per one crew in 2011 amounted to 11,665 meters (11,538 meters in 2010).

43.1 thousand meters were drilled outside the Republic of Tatarstan. 51 thousand meters were penetrated in horizontal wellbores and bottomhole splitters.

Wells Repair
824 remedial operations were performed in August of 2011 with a number of well remedial operations performed during eight months amounting to 5,426 wells, which is 530 wells less than in 2010 (5,956 wells for eight months of 2010). The number of remedial operations performed at the production wells reduced by 9.7 % (from 4,973 wells down to 4,491 wells), while the number of injection well repairs increased by 2.3 % (from 662 wells up to 677 wells).

34 wells have been repaired outside the Republic of Tatarstan since the beginning of the year with 30 wells for Tatneft-Samara and 3 wells for Tatneft-Severny and 1 well for Ilekneft.

The workover operations were performed in 1,724 wells (242 wells in August) during eight months of 2011, including: production string sealing performed in 256 wells; shutting-off individual layers and recompletion in other intervals in 182 wells; transfer of wells into different categories and wells completion for injection in 89 wells; failure liquidation and cleaning of the production string and bottom hole zone in 161 wells and physical liquidation and re-liquidation in 24 wells.

541 wells were worked over with application of coil tubing (81wells in August), including 89 wells worked over through the annulus.

Formation hydrofracking operations were performed in 214 wells (30 wells in August), which is 25% more than for the similar period of 2010 (171 wells for eight months of 2010). The increasing incremental crude oil recovery volume amounted to 5 million 224 thousand tons.
 
28 small diameter holes were drilled and completed for TATNEFT during eight months of 2011. At present drilling of one slim hole is in progress for NGDU Prikamneft and one slim hole for NGDU Nurlatneft.

Works on oil recovery enhancement (EOR) were performed in 1,603 wells during eight months (253 wells in August) with chemical treatment methods applied in 920 wells (140 wells in August). The incremental oil production volume resulting from the application of the enhanced oil recovery methods amounted to 3 million 550 thousand tons of crude oil with the chemical methods accounting for the production of 1 million 672 thousand tons.

Bottomhole area treatment operations with application of TATNEFT's technologies were performed at 2,162 wells during eight months of 2011.