ANNUAL REPORT 2005 - Lukoil

ANNUAL REPORT, 2005
Western Siberia
Bolshekhetskaya Depression
LUKOIL is developing reserves at the
Bolshekhetskaya Depression (Yamal-Nenets
Autonomous District) as part of the Company gas
program: the region will be the key to growth of gas
production in coming years. As of 1 January, 2006,
proved gas reserves at Company fields in that
region were 13.2 trillion cubic feet (2% more than
a year earlier), representing 52% of total proved gas
reserves of LUKOIL Group.
In 2005 seismic exploration work was completed
in the southern part of the Pyakyakhinskoye
license area and the north-eastern part of the
Nakhodkinskoye license area in order to locate and
prepare large and promising structures.
Exploration well №34 with depth of 3,600 meters was drilled at the South Messoyakhskoye field. The
well log identified presence of gas in all strata. Sampling was also carried out at well №13, which had
been drilled earlier: 12 gas and gas condensate structures were tested. As a result of the strata testing
a gushing flow of gas and water mixture was obtained from a depth interval of 1,227–1,243
meters, giving 13.7 million cubic feet per day. Testing of the strata at depth intervals of 1,146–1,154
and 1,133–1,146 meters gave a daily gushing flow of 1.2 million cubic feet of gas. Results from drilling
of well №34, sampling from well №13 and previous 3D seismic data enabled construction of a more
accurate geological model of the South Messoyakhskoye field and recalculation of gas reserves.
As a result proved reserves of gas at the field grew by 21% compared with the previous year, or by
453 billion cubic feet.
24