According to the above analysis result it was judged that majority of the suspended particle in ASP flooding produced water was the noncrystalline silica.

• 三元复合驱含油污水中悬浮物表面带有大量负电荷，对阴离子型絮凝剂具有静电排斥作用，使其无法在悬浮颗粒表面有效吸附，也就不能起到絮凝作用；