DETERMINING METHOD FOR PARAMETERS OF FORMATION NEAR ZONE Russian patent published in 2018 - IPC E21B49/00 E21B47/06 

FIELD: oil industry.

SUBSTANCE: invention relates to oil industry and can be used in planning implementation of technological impact on well bottomhole zone in order to increase injection capacity of injection wells. Problem of number increasing of estimated parameters is solved and an increase in reliability of state evaluation of formation near zone. Method includes liquid injecting into formation at constant flow rate, stopping well, bottomhole pressure and temperature measurement, interpretation of pressure curve by pressure drop curve (EFF), determination permeability of formation removed zone (k) and skin factor (S).

EFFECT: pressure drop (ΔR_s) at bottom is determined by skin effect, graphically curve slope of dependence of function of temperature changing due time (m_1n) is found, permeability values (k_s) and radius (r_s) of formation near zone by mathematical formulas.

1 cl, 5 dwg, 3 tbl