高温高盐可动凝胶配方研究与应用

通过室内实验，研究了聚合物分子量、聚合物浓度、交联剂用量及pH 值等因素对耐高温有机交联剂HT 2008 与高分子量星形抗温耐盐聚合物CA 2588 形成的凝胶黏度和成胶时间的影响，确定了尕斯库勒E13 油藏高温高盐可动凝胶调驱体系的基本配方及性能；环境扫描电镜结果表明，高分子量星形抗温耐盐聚合物CA 2588 和耐高温有机 交联剂HT 2008 能够形成稳定的互穿网络体型结构，该可动凝胶体系，在矿化度为117 000 mg/L（且钙镁离子含量高 达3 340 mg/L）、pH 值为7.80、实验温度为126 ℃ 条件下，5 d 时的黏度达到最高值43 900 mPa·s，180 d 时凝胶黏度为 43 500 mPa·s，耐温耐盐性能好，稳定性好；在尕斯库勒油田E13油藏进行深部调驱现场应用后，取得预期效果。

Study and Application of Movable Gel for High-Temperature and#br# High-Salt Gasikule Reservoirs

Abstract：A novel movable gel for high-temperature and high-salt reservoirs is proposed in this paper. The movable gel consists of the star-polymer（CA 2588）with temperature-resistance and salt-resistance and organic crosslinking agent（HT 2008）. Systemic investigation was carried out to examine the influence of star-polymer molecular weight，star-polymer concentration， crosslinker dosage，and pH value on gel viscosity and gelation time. It was observed clearly by the environmental scanning electron microscope that the interpenetrating polymer network structure was formed within the movable gel. The viscosity of the movable gel（0.2% CA 2588+0.66% HT 2008）reached the peak value of 43 900 mPa·s in brine salinity of 117 000 mg/L at 126 ℃. In addition，no obvious decrease in the viscosity of movable gel was found after 180 days. The movable gel with star-polymer（CA 2588）and organic crosslinking agent（HT 2008）was used for deep profile control and gel-flooding in Gasikule E13reservoirs，and achieved the desired effect.