Geomechanical Modeling for Determining Safe Mud Window and Evaluating Wellbore Wall Stability Using Numerical Simulation: A Case Study
Mohr-Coulomb and Mogi-Coulomb failure criteria and caliper logs were utilized to determine the safe mud window. The results demonstrated that the formations located at the north wing of the studied oil field are more stable than the other zones. Among the investigated zones, Zone 5 is the most stable and Zone 6 is the least stable zone in terms of shear stability. Zones 1 and 2 in the south wing and Zones 3 and 4 in the middle wing of the oil field are also highly unstable. The Mohr-Coulomb failure criterion is more competent in predicting the stability of the wells compared to the Mogi-Coulomb failure criterion. The main reason for instability in the wells of this oil field is the selection of non-proper mud weight (usually far smaller than optimal mud weight) while drilling. The least mud window is in the middle zone in Well 3, and the safe mud window is about 15 Mpa in other parts of the field. In Zones 6 and 7 of the field, the safe mud window is 22.95 and 32.92 MPa, respectively. A 40-degree azimuth is the safe drilling route to decrease the instability of wells during drilling operations in this field.
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Optimization of drilling penetration rate through the optimal design of drilling leg and mechanical and hydraulic parameters of drilling using energy characteristic method (case study: South Pars gas field)
Mohammadreza Nouri, *, Ali Mokhtarian
Journal of Simulation and Analysis of Novel Technologies in Mechanical Engineering, Sep 2024 -
A Critical Review of Wettability Alteration of Retrograde Gas Condensate Reservoirs Using Nanoparticles
Yahya Sanjoory, *
Journal of Chemical and Petroleum Engineering, Jun 2024