OREANDA-NEWS. May 19, 2010.Oil production. Oil companies of the Republic of Tatarstan produced 10,656,875 tons of crude oil during the period of four months or 100.3% with regard to the same period of the last year (+29,639 tons), reported the press-centre of TATNEFT.

OAO TATNEFT produced 2,122,582 tons of crude oil in April, accounting for 100% versus March of the last year with the above-the-plan production amounting to 34,968 tons (101.7%).

The amount of 8,499,385 tons of crude oil was delivered during the period of four (28,428 tons more, than in 2009) with the above-the-plan delivery amounting to 148,973 tons (101.8%).

The amount of 8,309,574 tons of crude oil was delivered with the above-the-plan delivery amounting to 165,324 tons.

Drilling
Conventional Drilling.
The total penetration during a four months period of 2010 amounted to 224.4 thousand meters (197.9 thousand meters in 2009): 192.9 thousand meters were drilled for OAO TATNEFT (182.2 thousand meters in 2009), including 187.5 thousand meters of production drilling and 5.4 thousand meters of exploratory drilling; 7.0 thousand meters were drilled for OAO TATNEFT subsidiaries and affiliated companies (8.5 thousand meters in 2009), including 4.1 thousand meters of production drilling and 2.9 thousand meters of exploratory drilling; 24.5 thousand meters (7.2 thousand meters in 2009) were penetrated for joint ventures and independent oil companies, including 23.1 thousand meters of production drilling and 1.4 thousand meters of exploratory drilling.

Totally 143 wells (109 wells in 2009) were constructed and handed over to customers and out of this amount: 97 wells (91 wells in 2009) were delivered to OAO TATNEFT with 95 production wells and 2 exploratory wells; 3 wells (3 wells in 2009) were drilled for OAO TATNEFT subsidiaries and affiliated companies, including 3 production wells; 43 wells (15 wells in 2009) were penetrated for the joint ventures and independent oil companies, including 40 production wells and 3 exploratory wells.

Drilling in the Old Well Stock
Total penetration of sidetracking and horizontal wellbores for four months of 2010 amounted to 10.0 thousand meters (9.4 thousand meters in 2009) including: 6.7 thousand meters penetrated for OAO TATNEFT (5.4 thousand meters in 2009), 3.3 thousand meters (4.0 thousand meters in 2009) thousand meters were drilled for joint ventures and independent oil companies.

22 wells were delivered to the customers (27 wells in 2009): 14 wells were delivered to OAO TATNEFT (20 wells in 2009); and 8 wells (7 wells in 2009) were delivered to joint ventures and independent oil companies.

In 2010, 40 drilling crews performed drilling operations with application of traditional drilling techniques. 10 drilling crews were engaged in sidetrack drilling and drilling horizontal wellbores with 6 of them drilling for NGDUs (Oil and Gas Production Boards) of OAO TATNEFT and 4 crews performed drilling operations for outside companies.

Penetration per one drilling crew for 2010 amounted to 5,606 meters, while in 2009 the penetration per crew amounted to 4609 м.

8.2 thousand meters were penetrated outside the Republic of Tatarstan. 24.4 thousand meters were penetrated in horizontal wells and multi-branched downhole splitters.

Well Workover
644 well remedial operations were performed in April 2010 and 2,875 remedial operations were performed during the period of four months, i.e.154 wells less, than in 2009 (3,029 wells during 4 months of 2009).

16 well repair operations were performed in OOO Tatneft-Samara, including 9 well remedial operations and 7 workover operations.

The workover operations were performed at 860 wells during a four months period of 2010 (705 wells during 4 months of 2009) with 226 jobs performed in April, including: production string sealing in 133 wells; shutting-off individual layers and recompletion in other intervals in 112 wells; transfer of the wells into different categories and wells completion for injection in 53 wells; failure liquidation and cleaning of the electrical cable and bottom hole areas in 101 wells.

268 wells were worked over with application of coil tubing (71 wells in April), including 62 wells worked over through the annulus.

Formation hydrofracking operations were performed at 73 wells (20 wells in April). The cumulative incremental recovery amounted to 3,248 thousand tons.

8 slim holes were drilled and completed for OAO TATNEFT from the beginning of the year. Drilling of one well is in progress for NGDU Aznakaevskneft at present, while drilling of another well was completed in NGDU Almetyevneft.

Works on oil recovery enhancement were performed at 699 wells (128 wells in April), including chemical treatment methods applied at 393 wells (71 wells in April).

The incremental oil production resulting from application of the enhanced oil recovery methods amounted to 1 million 733 thousand tons with the chemical methods accounting for the production of 837 thousand tons of crude oil.

Operations for preparation and delivery of acid compositions were carried out at 834 wells during four months of 2010 and the production of chemical products amounted to 12 thousand 352 tons of chemical products for the amount of 258 million rubles.