Synthesis and Performance Evaluation of Fiber Reinforced Gel

The performance of temporary plugging materials largely determines the effect of temporary plugging transformation, while conventional temporary plugging materials often cannot meet the needs of ultra-deep, ultra-high temperature, ultra-high pressure and deficit reservoir construction. In view of the above problems, with the goal of temperature resistance reaching 160 ℃, strength higher than 30 MPa, and gel breaking time reaching 10 h,this paper proposes to synthesis of thermosensitive gel and all-degradable fiber into fiber reinforced gel.The technical principle is that the chemical network structure of thermosensitive gel and the physical network structure of fiber form a three-dimensional composite network framework, which greatly improves the strength of temporary plugging materials.The performance evaluation showed that the gelation time of the fiber-reinforced gel could be controlled within 5-26 min at 80-100 ℃ ; the temporary plugging time was also greatly improved, and the gel was completely broken at 160 ℃ for nearly 10 h.In the experiment, under the condition of 2 mm fracture width, the bearing pressure ability is more than 30 MPa, and the larger the fracture width is, the higher the bearing capacity is. Under the condition of 6 mm fracture width, the bearing capacity can reach 40 MPa, which is suitable for the temporary plugging and steering transformation of the “three excesses” depleted reservoir, and can meet the needs of field construction.