Mechanics of the tubing string for supercritical CO2 fracturing Online publication date: Mon, 07-Feb-2022
by Wenguang Duan; Baojiang Sun; Deng Pan; Hui Cai
International Journal of Computer Applications in Technology (IJCAT), Vol. 67, No. 1, 2021
Abstract: Supercritical CO2 fracturing is one of the most efficient ways for increasing petroleum productivity. Tubing string for the fracturing is necessary and plays an important role in the fracturing process. A mechanical model of the tubing string in the well for fracturing is set up. The forces on the tubing string are analysed. The mechanical formulas are derived. The stresses of the tubing string are calculated and the strength of the tubing string is checked. Running accessibility of the tubing string through the well for fracturing is studied. The equations for calculating critical force on the tubing string for fracturing causing sinusoidal bucking and helical bucking are given. Based on the finite element method, a model is setup. The stress and deformation of the tubing string in the horizontal and deviation well sections are calculated. Results show that under the given conditions, the tubing string is safe and efficient.
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