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)
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;