Neftegaz.RU #3-17 ENG

OFS
BUSINESS-ACCENT
a 400 m bed of perennially frozen rocks. Also by
reducing the area of drilling sites SSC helped to
protect the unique ecosystem of the Arctic zone.
Drilling for Exploration
In 2015 Gazpromneft-Development LLC held a
contest among several drilling teams involved in
geological exploration of wells in the Messoyakha
project. The best drilling team (the second year
in a row) was the team of the well No. 118, with
the general contractor – JSC Siberian Service
Company.
This well of the Messoyakha oilfield was drilled
a traditional, turbo-rotor way, using polymer clay
drilling mud. High commercial and mechanical
speed was achieved through best-possible
combination of drilling bit and DDM (downhole
drilling motor).
Professional attention and proprietary technology
allow the team to perform the entire scope of
works without any foreign contractors. It was
thanks to the well-organized work of all service
contractors and the drilling crew involved in the
FACTS
256 bln.
rubles – investments up
to 2040
13
cluster sites with utilities
have been built before the
launch
Well No. 118 fall under the first category of difficulty (including
abnormally high formation pressure).
The well profile is vertical.
The design depth is 3б500 m (426 mm course is 100 m;
324 mm conductor is 550 m; service casing is 1,300 m; 168 mm
production casing is 3,040 m; 114 mm liner casing is 3,500 m).
Core sampling is 75 m (in the production casing and liner
casing).
Actual depth is 3,500 m (vertical). All casings were landed in
accordance with the project, and the core sampled in full: total
recovery was 98%.
The well was drilled by the SSC crew No. 3: Drilling Master
M. Tkachenko, Drilling Supervisors – E. Zyryanov and N. Kornev
well construction, such high quality
of performance was possible.
The core was sampled by a
paired core barrel every 18 m.
Professional lithology splitting
of the well log performed by
the geological service team
eliminated any further plugging or
underdrilling prior to core sampling
at given intervals.
The winning team managed to
build the well three days ahead
of the planned date without any
accidents. The main criteria
evaluated by the judges was the
higher quality of well construction,
meeting the requirements of
industrial safety while reducing
the non-productive time spent
on repairs of equipment and
organizational issues. If all of
these conditions are observed, the
well construction cycle is notably
reduced.
The high efficiency and excellent
quality of work at the Messoyakha
oilfield was a logical result of
SSC staff experience, who were
working on the site since 2011.
Only a good teamwork could
handle the site at Messoyakha.
Engineering staff has a lot of
experience in drilling (at least 7
years). Before the actual drilling of
a well, drillers do it on paper: they
get together for a special meeting
with all drilling staff involved, and
discuss the construction of the well
and all of its aspects.
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