Limited and optimum discharge pressures for wells of PJSC "TATNEFT"
UDC: 622.276.432
DOI: -
Authors:
SMOTRIKOV N.A.
1,
IKTISANOV V.A.2,
BAYGUSHEV A.V.1,
FATTAKHOV I.G.1,
YACHMENEVA E.A.3,
PIMENOV A.A.1
1 TatNIPIneft PJSC "TATNEFT" named after V.D. Shashin, Almetyevsk, Russia
2 St. Petersburg Mining University, St. Petersburg, Russia
3 Kazan (Volga region) Federal University, Kazan, Russia
Keywords: hydrodynamic studies, maximum pressure, optimal pressure, injection, injection well
Annotation:
Hydrodynamic studies of wells were carried out under steady and unsteady filtration modes, according to the results of which the fracture formation pressure was determined. The injection pressure increase above this pressure is not recommended in order to avoid water breakthrough to production wells. Dependences of the ultimate pressure on the determining parameters for medium- and deep-lying rocks were revealed. The performed studies led to the creation of empirical formulas for calculating the ultimate pressure of terrigenous and carbonate reservoirs. The difference of the determining parameters for medium- and deep-lying reservoirs, regardless of the type of the reservoir, was found. The existence of fairly high coefficients of hydraulic conductivity exponential dependence on pressure was revealed in comparison with petrophysical studies, which is probably caused by the additional influence of nonlinear viscous filtration. The problems of optimal injection pressures are considered. It is shown that at the late stages of development with high water cut, one should strive not for maximum oil production, but for maximum net present income, which requires reduction of injection pressure, bringing it to maximum pressures.
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