Structural failure mechanism and strengthening method of fracture plugging zone for lost circulation control in deep naturally fractured reservoirs

XU Chengyuan,YAN Xiaopeng,KANG Yili,YOU Lijun,ZHANG Jingyi

Table 3 Performance parameters of some LCMs used in the fracture plugging experiment.

No. Initial D90/μm Friction coefficient D90 degradation rate after compression/% D90 degradation rate after aging and compression/% K3 7836 1.23 8.76 4.20 K4 4207 0.95 17.66 6.50 K5 2715 1.07 17.66 4.01 G7 3801 0.89 4.78 1.02 G12 4797 0.66 3.84 1.14 D2 4380 0.94 4.48 1.39 D11 1155 1.04 2.12 8.72