METHOD FOR ONLINE FORECASTING OF MAIN PARAMETERS OF OIL DEPOSITS DEVELOPMENT Russian patent published in 2013 - IPC E21B49/00 E21B47/00 

FIELD: oil and gas industry.

SUBSTANCE: method includes determination of permeability, porosity, viscosity of a displacement agent and a displaced fluid, efficient oil-saturated thickness of a bed opened by a well, initial bed pressure for all facilities of mining of a tectonic structure, saturation pressure. Field process information is collected on relative phase permeabilities of the displacement agent and the displaced fluid with account of field information on viscosities of filtration components, on relative phase permeabilities when gas is released from a fluid into a free phase. Values of balance and extracted reserves of oil and design bottomhole pressures at producing wells are determined by years of development. To determine dynamics of development parameters by years, a number of production and injection wells introduced year by year is forecast. Following the results of calculation by years, values of oil, fluid, gas production, water cut, current bed pressure, decommissioning of wells, current coefficient of oil extraction are determined. Additional the initial debit of the wells is determined by fluid using the given mathematical expression. Initial productivity of oil-producing wells is analysed depending on the type of carriers, their dynamics as thermodynamic conditions vary for deposits of analogues. The current productivity is determined, as well as the average injection capacity of injection wells depending on permeability of carriers, water injection. Water cut of well products is determined according to dependence on development of oil reserves, as well as current bed pressure using the given mathematical expression. The number of producing and injection wells is forecast after drilling on the basis of the given dependences.

EFFECT: improved method and increased accuracy of forecasting of development parameters for new facilities at initial stage of development.

2 cl, 2 dwg, 1 ex