METHOD FOR PROCESSING FACE-ADJACENT ZONE OF PRODUCT WELLS (VARIANTS) Russian patent published in 2005 - IPC

FIELD: oil industry.

SUBSTANCE: method includes blocking of one range and forcing of acidic solution into another range, blocking is performed by pumping a suspension of following compound, with relation of components in portions of mass: oil absorbent 5-35, surfactant 0.005-0.5, water 1000 with amount of said absorbent determined from mathematical formula. Method also includes blocking of one range by forcing water suspension of oil absorbent, amount of which is determined from mathematical formula, and pumping acidic solution into other range, and using said suspension, containing additional surfactant with following relation of components in portions of mass: oil absorbent 5-35, surfactant 0.005-0.5, water 1000, during blocking oil buffer is additionally pumped in 1.5-2 times greater amount than said absorbent. As mathematical formula in each method following one is used: P=δ_p·0.785·D²·H·K_dyn.por./K_oil, kg, where P - weight of said absorbent, kg; δ_p - poured weight of said absorbent, kg/m³; D - diameter of processed bed portion, m; H - bed thickness, m; K_dyn.por. - coefficient of dynamic porosity, shares of one; K_oil - coefficient of absorbent oil capacity, kg/kg.

EFFECT: higher quality.

2 cl, 3 ex, 4 tbl