Crude Oil Production
2,199,508 tons of crude oil were produced in May with the production for five months amounting to 10,781,208 tons accounting for 54,422 tons increase versus 2011 (100.5%). 10,624,550 tons of crude oil were delivered with the above-the-plan delivery amounting to 315,640 tons.
OAO TATNEFT Group of companies produced 10,902,038 tons of crude oil with the above-the-plan production amounting to 239,015 tons (102.2 percent).
The new drilling penetration for 5 months of 2012 amounted to 273.3 thousand meters (233.5 thousand meters in 2011), including 199.3 thousand meters (189.6 thousand meters in 2011) drilled for OAO TATNEFT with production drilling amounting to 197 thousand meters and exploratory drilling amounting to 2.3 thousand meters. 25.3 thousand meters (19.4 thousand meters in 2011) were drilled for the subsidiaries of OAO TATNEFT, including production drilling in the amount of 19.1 thousand meters and exploratory drilling in the amount of 6.2 thousand meters.
153 wells (156 wells in 2011) were constructed and delivered to the customers, including 106 wells (113 wells in 2011) for OAO TATNEFT, among them 104 wells of production drilling and 2 wells of exploratory drilling. 11 wells (14 wells in 2011) were delivered to the subsidiaries of OAO TATNEFT, including 10 wells of production drilling and 1 well of exploratory drilling.
Active Well Stock Drilling
The total penetration of sidetracking and horizontal wellbores during five months of 2012 amounted to 17.6 thousand meters (in 2011 - 17.5 thousand meters), including 9 thousand meters (10.9 thousand meters in 2011) drilled for OAO TATNEFT.
31 wells (35 wells in 2011) were delivered to the customers, including - 19 wells for OAO TATNEFT (27 wells in 2011).
38 drilling crews have been performing well drilling operations since the beginning of 2012 and 9 drilling crews are engaged in drilling lateral and lateral horizontal wellbores. One drilling crew performs drilling to the bituminous deposits of Ashalchinskoye field for NGDU "Nurlatneft".
The penetration per crew in new drilling amounted to 7,006 meters for 5 months of 2012, while in 2011 the penetration per crew amounted to 6,763 м. 38.7 thousand meters were drilled outside the Republic of Tatarstan.
Repair of wells
In May 2012 remedial operations were performed in 552 wells (570 wells in May, 2011) with a number of the wells subjected to remedial operations for five months amounting to 3,303 wells (3071 wells in 5 months of 2011).
25 wells were repaired outside the Republic of Tatarstan, including 24 wells for OOO "Tatneft-Samara", 1 well for OAO "Ilekneft (15 wells were repaired during 5 months of 2011, including 13 wells for OOO "Tatneft-Samara" and 2 wells for OOO "Tatneft-Severny").
The workover operations were performed in 959 wells (202 wells in May), including production string sealing performed in 133 wells, shutting-off individual layers and recompletion in other intervals were performed in 70 wells, transfer of wells into different categories and wells completion for injection in 63 wells, liquidation of downhole complications and cleaning of production casing and bottomhole in 106 wells, installation of isolating packers and dual completion systems in 28 wells, physical liquidation in 17 wells.
306 wells were worked over with application of coil tubing (70 wells in May), including 52 wells worked over through the annulus.
Formation hydrofracking operations were performed in 159 wells (32 wells in May) accounting for 33 wells increase versus the similar period in 2011 (126 wells in 5 months of 2011). The cumulative incremental crude oil production resulting from application of this method amounted to 5 million 558 thousand tons.
15 small diameter wells were drilled and completed for OAO TATNEFT by the workover crews during five months of 2012. At present drilling of one slim hole is in progress for each NGDU "Nurlatneft", NGDU "Jalilneft" and NGDU "Prikamneft".
Works on oil recovery enhancement were performed in 871 wells (180 in May) including chemical methods applied in 501 wells (117 in May).
The incremental crude oil production resulting from application of crude oil recovery enhancement methods amounted to 2 million 492 thousand tons with application of chemical methods accounting for the production of 1 million 117 thousand tons.
Bottomhole area treatment operations with application of OAO TATNEFT's technologies were performed in 1,255 wells for five months of 2012.
Performance Figures of ОАО TANECO
The TANECO complex of Refining and Petrochemical Plants processed 665.3 thousand tons of oil and produced 661.4 thousand tons of oil products in May.