METHOD FOR TREATING DOWN-HOLE ZONE OF RESERVOIR

摘要

FIELD: oil production industry. SUBSTANCE: high efficiency of method is achieved due to increased range of treatment as to depth and thickness of reservoir with involvement in operation of low-permeable clay-containing collectors which resulted in enhanced injectivity of injection wells. Need for improving filtration properties of reservoir on bases of hydrodynamic investigations of restoring pressure in well is connected with reduced productive coefficient of wells, reduced permeability of reservoir in down-hole zone, lower range of reservoir subjected to injection as to its thickness. According to method, treatment of reservoir down-hole zone is effected by washing it with water which is magnetized by lateral magnetic field with intensity of at least 2•10A/m, and added in water is crown-ether in concentration of 0.005-0.01%. In function of washing liquid also is usable common non-magnetized water with addition of crown-ether of same concentration. Method reduces swelling of clay by 21%, and with common non-magnetized water with crown-ether does it by 6% larger than in treatment by magnetized water. EFFECT: high efficiency. 1 cl