CO2气驱是强化采油的重点发展方向，而伴随出现的气窜封堵问题，目前国内外研究较少。华东分公司是国内较早开展 CO2气驱试验的油田。在气驱开发过程中针对油藏气窜的实际情况，通过大量室内试验，研究评价了成胶时间可控（3～15天）、注入性、耐温抗盐性（90℃～110℃，抗盐能力可达30000 mg/L以上）及封堵性能较好（封堵率大于95%）的聚合物冻胶与预交联体膨颗粒堵剂组合配方体系。结合试验区地质特点、动静态资料,优选草5井实施了化学法封窜施工，现场初步见到了一定的成效，为CO2气驱油藏的气窜封堵积累了宝贵的经验。%CO2 flooding is one of the main directions of enhanced recovery development. The domestic and foreign studies of gas channeling treatment are very deficient. CO2 flooding tests were early applied in east china company, Sinopec. A lot of experiments were done focus on the gas channeling fact to optimize the polymer gel and pre-gelled swellable particle plugging agent. The gell-ing time (3 ~ 15 days), injectivity, heat resistance (90 ℃~110 ℃), salts tolerance (≥30 000 mg/L) and plugging performance (pull-ing ratio≥95 %) were studied in the optimization process. Based on the geologic characteristic and dynamic/static parameters, the chemical channeling treatment of polymer gel and pre-gelled swellable particle plugging agent was applied in the well Cao-5 suc-cessfully. The successful case will guide the gas channeling treatment in the CO2 flooding reservoirs.
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