METHOD OF RETAINING RESERVOIR PROPERTIES OF PRODUCTIVE STRATUM IN NEAR-WELL ZONE

摘要

FIELD: oil production industry; ensuring reliable filtration connection between productive stratum and well during operation; primary drilling-in of productive stratum, secondary drilling-in of productive stratum and temporary killing of well. ^ SUBSTANCE: proposed method includes preparation of hydrocarbon emulsion with hydrophobic particles of soot and surfactant and forming hydrophobic colmatage layer on well walls. Thickness of this layer is sufficient for avoidance of filtration of liquid from well into productive stratum. Hydrocarbon emulsion is prepared with aqueous solution of cation-active surfactant and soot of finely dispersed carbon at diameter of particles not exceeding 0.1 mcm in the amount of 2-5 wt-%. ^ EFFECT: enhanced efficiency at reduced consumption of hydrocarbon liquid; increased heat exchange; enhanced stability of water-in-oil emulsion. ^ 4 cl, 1 ex