PROCESS OF REAGENT TREATMENT OF ZONE NEAR WELL Russian patent published in 2002 - IPC

FIELD: oil and gas industry. SUBSTANCE: process includes pumping of technological solution into pool, its holding in pool and subsequent removal of technological solution and products of its reaction with mud grouting formations. Coefficient of intake of well- relation of pumping flow rate of technological solution to pumping pressure is found in process of pumping of technological solution. After this equal portions of technological solution having volume of 5-10 % of volume of technological solution initially injected into pool are pumped into pool every 20-40 min of treatment under pressure equal to pumping pressure of technological solution into pool. Coefficient of intake of well is determined after pumping of each portion of technological solution. Treatment of zone is completed when coefficient of intake of well stabilizes. EFFECT: raised productivity of well by way of total removal of mud grouting formations and action on penetrability of rock composing productive pool. 3 tbl