关键词: 套损, 套变, 油水井窜漏, 化学复合树脂, 华北油田

Abstract: Compound resin used for blockage agent for leakage breaking through casing can solve a series of problems arising from various causes during the high water-cut period, such as leakage of oil wells and water wells, casing damage and casing deformation. The basic formula can satisfy the formation temperature from 40℃ to 110℃ while the controllable reaction time is three to eight hours. The tensile strength of cured samples ranges from 10. 8MPa to 13MPa, the compressive strength from 13MPa to 87MPa and the anti-shearing strength from 9. 2MPa to 28. 9MPa. The dissolution rate of cured samples is lower than 1 percent when soaked respectively in the solutions of 10% HCI, 10% NaOH and 10% NaCI for 24 hours at the temperature of 100℃. Field application of chemical composite resin for preventing casing leakage showed that it had high mechanical strength after solidifying, and had strong penetration ability to the permeable channels, with better durability, higher technical reliability and process success rate.