RU2014139718A - METHOD AND SYSTEM OF INDIVIDUAL PREPARATION OF THE PUMPED-IN FLUID FOR CLEANING OF THE BOTTOM ZONE OF A STRESSED WELL - Google Patents

Abstract

1. The method of individual preparation of injected fluid for cleaning the bottomhole formation zone of the injection well, comprising the steps of determining the volume of the treatment zone of the bottomhole formation zone, the radius of the treatment zone of the formation and porosity coefficient of the formation, the perforated interval without taking into account impermeable layers, based on previously conducted geophysical and hydrodynamic studies, determine the first calculated volume of surfactant for the first fluid injected, the first injected fluid provides a rim flushing the collector during the subsequent injection of the second injected fluid, the first calculated volume being determined according to Vp1 = Vppz · Kpor, where Vпзп = π · R · п, Vp1 is the first calculated volume of surfactant, m, Vпзп - volume of the treated zone of the bottom-hole zone of the formation, m, Kpor - coefficient of porosity of the formation, unit, R - radius of the treated zone, m, Нп - perforated interval without taking into account impermeable layers, m, ensure the supply of the first pumped fluid into the well, determined The second calculated volume of the surfactant for the second injected liquid is determined: Vp2 = 0.01 ∙ Vcc.z ∙ Kpor ∙ Kpr, Where Vcc.z is the daily volume of water injected. m, Kpor — reservoir porosity coefficient, unit, Kpr empirical coefficient of proportionality in the range from 0.001 to 1, provides a dosed supply of the second estimated volume of surfactant for the second fluid injected into the well for a predetermined time, and the daily volume of the second calculated dose the volume of surfactant does not exceed 1% of the daily volume of water injection and

Claims (2)

1. The method of individual preparation of injected fluid for cleaning the bottom-hole zone of the reservoir injection wells, containing stages in which determine the volume of the treated zone of the bottomhole formation zone, the radius of the treated zone of the formation and the coefficient of porosity of the formation, perforated interval without taking into account impermeable layers, based on previously conducted geophysical and hydrodynamic studies, determine the first estimated volume of surfactant for the first injected fluid, and the first injected fluid provides a rim flushing the manifold, with the subsequent injection of the second injected fluid, and the first estimated volume is determined according to Vp1 = Vppz · Kpor, where Vпзп = π · R ^{2 ·} · n, Vp1 - the first estimated volume of surfactant, m ³ , Vпзп - the volume of the treated zone of the bottomhole formation zone, m ³ , Kpor - the coefficient of porosity of the reservoir, u R is the radius of the treated area, m, Np - perforated interval excluding impermeable layers, m, provide the first injected fluid into the well, determine the second estimated volume of surfactant for the second injected fluid Vp2 = 0.01 ∙ Vcc.z ∙ Kpor ∙ Kpr, Where Vcc.z is the daily volume of water injection. m ³ Kpor - the coefficient of porosity of the reservoir, u CRC empirical coefficient of proportionality in the range from 0.001 to 1, provide a dosed supply of the second calculated volume of surfactant for the second fluid injected into the well for a predetermined time, the daily volume of the dose of the second calculated volume of surfactant not exceeding 1% of the daily volume of water injected and the specified time is from 1 to 5 days. 2. The system of individual preparation of injected fluid for cleaning the bottom-hole zone of the reservoir injection wells, containing water conduit configured to supply water, a surfactant containing bin a unit for determining the estimated volume of surfactant for injected fluids, wellhead dispenser configured to supply a volume of surfactant in an adjustable manner, a container configured to receive water and a volume of a surfactant, and dissolve the received volume of a surfactant in water to produce an injected liquid, pumping equipment configured to pump fluid obtained from a reservoir into an injection well, moreover, the system is configured to implement the method according to p. 1.