| Title | Torque and Drag Sensitivity Analysis for Geothermal Deep Well |
|---|---|
| Authors | Fatah GUNAWAN, Widoyo KRISNANTO, Agus A. ZUHRO |
| Year | 2020 |
| Conference | World Geothermal Congress |
| Keywords | torque, drag, sensitivity |
| Abstract | In the early phase of well planning design, several aspects are taken into account in order to reach the target depth. One of the aspect that mostly disrupt the achievement into the target depth is the excessive torque and drag suffered by the drill string and BHA along the way to the surface. It is essential for understanding the factors that affect the torque and drag number, hence it can be used for better well planning and prevent the risk of potential drilling problems. The main factor that will be analyze in this paper is the effect of various hole geometry design into the calculation models of dynamic torque and drag. The calculation models of torque and drag are mostly describes the mechanical forces which is consist of frictional losses to rotate and force to raise and lower the BHA and drill string. By putting a different variable of trajectory design such as kick-off depth, build up rate and final well inclination to reach the similar target depth, the optimal torque and drag roadmaps could be estimated and the best scenario of the hole geometry for geothermal deep well will be obtained. |