Determination of optimal well trajectory during drilling and production based on borehole stability

作者：Zare Reisabadi M R^*; Kaffash A; Shadizadeh S R

来源：International Journal of Rock Mechanics and Mining Sciences, 2012, 56: 77-87.

DOI：10.1016/j.ijrmms.2012.07.018

• Wellbore stability
• Optimal wellbore trajectory
• Maximum drawdown pressure
• Mogi-Coulomb failure criterion
• Sand production

Several studies have been done about boreholestability and optimized wellbore direction. However, the majority of them focused on stability during drilling, and there are only a few studies concerns with stability during drilling and production and its problems such as sanding simultaneously. This paper presents an analytical model that estimates collapse pressure in stability analysis during drilling and in addition determines maximum drawdown pressure to prevent sand production, using the MogiCoulomb failure criterion. The results show that in different in-situ stress regimes, the inclination and azimuth have a significant role in wellbore stability during both drilling and production. Furthermore, the results show that the optimum direction for wellbore stability during drilling is also the best direction for stability of a productionwell. The analytical model is applied to field data in order to verify the applicability of the developed model.

• 出版日期2012-12
• 单位中国石油大学（北京）