In order to solve the problem of quantitative design of fiber in fiber temporary plugging and diverting acid fracturing

a total stress field model considering the initial artificial fracture

adjacent well artificial fracture

pore pressure change

temperature change and in-situ stress is established. And then the prediction model of diverting radius is established by multivariate nonlinear regression. Meanwhile

methods such as the displacement discontinuity method（DDM） are used to solve the model

and combined with the fiber plugging mechanism

the design model of fiber dosage is established. The simulation results show that the induced stress value of the initial artificial fracture in the direction of minimum principal stress is larger

and the influence of artificial fracture of adjacent well or wells

pore pressure variation and temperature variation on stress diverting are small. The smaller the original in-situ stress difference

the longer the initial artificial fracture length

the smaller the well spacing

the larger the net pressure in the fracture

and the larger the diverting radius. When the in-situ stress difference is large

it is necessary to use the temporary plugging of fiber to increase the net pressure of the fractures

and the fiber dosage can be determined according to the design plate. Applying the above design method to a well in Xinjiang

the results were basically close to the on-site construction results

and the new fracture diverted successfully.