ro, the permeability recovery value is greater than 95%, than the domestic and foreign present temporary plugging and reservoir protection technology of the permeability recovery value increased about 25%, in order to realize reservoir ultra low damage or no damage to lay a theoretical and technical foundation.

The new method for evaluating dynamic leak plugging method of ultra low permeability drilling fluid leak plugging the new technology and the simulated downhole conditions. Field application of plugging a success rate of more than 90%, improving ground bearing capacity than similar foreign technology is higher than 20-30%, leak plugging effect is obvious, the technology to solve the drilling long open hole more susceptible to pressure layer system leakage, sticking, collapse and formation damage, the coexistence of technical problems.

This achievement has authorized 2 national invention patents, 7 utility model patents, positive real instance 2 national invention patent