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December 02-03, 2019 | Dubai, UAE
Oil & Gas
2
nd
International Conference and Expo on
Journal of Industrial and Environmental Chemistry | Volume 3
Optimization of multistage Hydraulic fracturing technologies in reservoirs with close oil-
gas and water-oil contacts and the presence of weak barriers with low stress contrast
Kazakov Evgenii, Fayzullin Ildar
and
Sayfutdinov Elnar
GAZPROM NEFT Science & Technology Centre, Russia
F
or effective stimulation of wells by hydraulic fracturing
requires deep engineering and technological research
work. The paper shows various ways of optimization
multistage fracturing operations in reservoirs with weak
barriers with low stress contrast. One of the solutions of the
tasks is to optimize the existing guar fluid systems to control
the fracture height. To achieve the maximum effect was
carried out gradual decrease the polymer concentration, used
low-viscosity liquids and combined "pad" stages. Additionally,
hadbeenperformingworkstooptimizethepumpingschedule
and increase its aggressiveness. To achieve the maximum
effect for cleaning of the created fracture, the concentration
of enzymedestructorwas gradual increasing. As analternative
approach to stimulation, was chosen hydraulic fracturing on a
non-polymer fluid system (surface active agent). To minimize
the risks associatedwith STOP regime, has been implemented
multi-stage completion system with reusable sleeves, which
controlled by special key with involvement of coil tubing and
bottom-hole pressure monitoring. As in addition methods
of control had been using microseismic monitoring and
different geophysical studies. Analysis of actual oil production
rate showed the success of the applied approaches to
achieve maximum efficiency of the stimulated wells.
Speaker Biography
Kazakov Evgenii is who as an Нead specialist, Department of fracture
designs in GAZPROMNEFT Science & Technology Center, Saint-Petersburg,
Russia.
e:
kazakov.eg@gazpromneft-ntc.ruKazakov Evgenii et al.
, J Ind Environ Chem, Volume:3
DOI: 10.35841/2591-7331-C3-014