It is environmentally safe , beneficial to reservoir protection .Tests indicate that HFT can be used as filtration reducer at high temperature , it can reduce the permeability of filter cake .

• 通过室内和现场试验评价了几种高温封堵性降滤失剂的封堵效果,结果表明,HFT降滤失剂封堵效果最为理想。