Coiled Tubing Erosion Prediction and Fracturing Fluid Parameters Optimization During Hydraulic Jet Fracturing

The erosion wear of coiled tubing wound on the drum by fracturing fluid gravel greatly affects its service life and the operation safety during hydraulic jet fracturing operation in oilfield applications. Based on computational fluid dynamics, discrete phase model and optimal design theory, this paper uses ANSYS workbench software to numerically simulate the erosion of 2.375″ coiled tubing wound on the drum by fracturing fluid. The simulation result shows that the coiled tubing erosion rate is most affected by fracturing fluid injection velocity. Gravel mass flow rate has less effect. Gravel diameter has the least effect. Coiled tubing erosion wear can be effectively controlled by optimal matching smaller fracturing fluid injection velocity and a certain range of gravel mass flow rate values. This research provides a new simulation method for accurately and efficiently predicting coiled tubing erosion and wear failure, and the results can provide some theoretical help for fracturing operations.