Bridging plugging slurry and preparation method thereof

The invention provides bridging plugging slurry and a preparation method thereof. The novel plugging slurry with good flowback capability is formed by bridging the shape memory alloy with the two-way effect in the plugging slurry and utilizing the characteristic that the shape of the shape memory alloy is changed under the influence of temperature, is used for reservoir plugging construction, can expand to form a plugging layer at the reservoir temperature, and can be used for reducing the temperature of a near-shaft reservoir by adopting a clear water circulation mode in the later period. The plugging material shrinks, the plugging layer is damaged, the plugging material in the oil-gas seepage channel flows back, the oil-gas seepage channel is liberated, the later oil-gas yield is not affected, and the yield and development efficiency are improved. 本发明提出了一种桥接堵漏浆及制备方法。通过桥接堵漏浆中的具有双程效应的形状记忆合金，利用其受温度影响形状发生变化的特点，组成具有良好返排能力的新型堵漏浆，用于储层堵漏施工，在储层温度下能够膨胀形成封堵层，后期采用清水循环的方式降低近井筒储层温度时，堵漏材料收缩，封堵层破坏，油气渗透通道内的堵漏材料返排出来，解放油气渗流通道