AL-Obaidi S.H.1), Hofmann M.1), Smirnova V.2)
1) Department of Petroleum Engineering, Mining University (Russia)
2) Scientific Research Center, SPB (Russia)
https://doi.org/10.53656/nat2022-5.02
Abstract. The paper presents the results of laboratory and field experiments on
a developed polymer gel-forming composition “PSB” that enhances oil recovery. In
this composition, two aqueous solutions are used: a polymeric gelling agent and an
inorganic crosslinker. An alternating injection of solutions that are mixed directly in
the reservoir allows a bulk gel to be formed that blocks water or gas breakthroughs.
This leads to an increase in oil production, and a decrease in water cut, resulting in
more efficient wells.
On five wells in a hydrocarbon field that was located within the Permian-
Carboniferous deposits, a series of field tests were conducted. It has been
observed that wells treated with this developed polymer gel-forming
composition “PSB” show a decrease in water cut, a decrease in liquid flow
rates, and an increase in oil production. This technology led to an increase in
oil flow rates of 5 tonnes per day per well (2 times) and a decrease in water
cut of 10-40%, confirming its effectiveness. According to the values of the
cumulative effect as of February 2016, this effect continues to increase oil
production by 20-600 tons per well.
Keywords: Oil recovery; Polymers; Crosslinkers; Gel-forming composition;
PSB
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