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PRODUCTION
steam and heat effect. After well
treatment, significant reduction
in water cut is registered, by
12 – 40%, and significant increase
in oil production rates in the first
months after treatment, see Table 3,
Fig. 3, 4. Treatment effect in well
No.7054 (Fig. 3a) for only first three
months comprised ~1,700 tons of
additionally produced oil.
Results of the first pilot works of
application of the MEGA gel-forming
nanostructured compound with
the technology to reduce water
and EOR conducted in late 2016,
at five production wells of the
Permian-Carboniferous Deposit
of the Usinskoye Field with cyclic
steam treatment and in the area
of steam injection, confirm the
ability of the MEGA compound to
effectively block the flow of water in
the production well, which leads to a
significant reduction in water content
by 12 – 40% and the corresponding
increase of oil production rates. It
is planned to continue research in
this area to expand the scope of the
technology.
Increase in oil recovery of
deposits of high-viscosity oil
grades without thermal impact,
with application of acidic oildisplacing
compound with
adjustable viscosity
As a result of studying regularities
governing colloid-chemical and
rheological properties of petroleum
disperse systems under lowtemperature
physical and chemical
effects on high-viscosity oil deposits,
the IPC SB RAS developed new
“cold” physical and chemical
methods of increasing of oil
production increasing. Oil-displacing
compositions of the new type
nanostructured acidic and alkaline
compositions based on surfactants,
coordinating solvents and complex
compounds, having adjustable
viscosity and high oil-displacing
ability, which retain in the layer for
a long time a complex of colloidal
chemical properties, optimal for the
production of heavy heavy oils were
proposed for their implementation
[15, 17, 18]. The acidic compound
demonstrated its highest efficiency
for carbonate reservoirs.
In order to increase oil recovery and
intensify oil production in deposits of
high-viscosity oils in the absence of
steam-heat treatment at 20 – 40°C,
due to the increase in permeability
of reservoir rocks and increase in
productivity of production wells, an
oil-displacing acid composition of
the prolonged action of the HBB
based on surfactant, inorganic acid
adduct and polyhydric alcohol was
developed. All reagents used are
products of large-tonnage industrial
production. The compound is
compatible with mineralized reservoir
waters, has a low freezing point
(from minus 20 to minus 60°C),
low tension between phases at the
boundary with oil. The compound
is applicable within the wide
range of temperatures, from 10
to 130°C, and is most effective in
carbonate reservoirs, in particular,
in the Permian-Carboniferous
Deposit of the Usinskoye Field. The
composition has a slow reaction with
carbonate rocks, prevents formation
of insoluble reaction products in the
porous medium, has a dehydrating
effect, restores initial permeability of
the reservoir.
Pilot and industrial works with
application of the GBC acidic
compound of prolonged action
were performed at the Permian-
FIGURE 3. Results of SHE on the Permian-Carboniferous Deposit of the Usinskoye field to Limit the Water Inflow with the Application of
the MEGA Gel-Forming Composition: Increase in oil production rates, reduction in water cut: (а) – in production well No.7054 with SCT;
(b) – in production well No.6108 in the area of steam and heat effect
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