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<p>A comprehensive geomechanical analysis has a critical implication in various phases of field development based on a thorough understanding of the stress regime and mechanical properties of the rocks. The main objective of this study is to determine the in-situ stress regime in Illizi basin by building a credible and suitable geomechanical model for more decision making in the choice of new well drilling and well fracturing. The analysis involved estimating the principal stress tensor (vertical stress (sv), horizontal stress (SH) and pore pressure (PP)), data from nine wells, including wireline logs, core measurements, and petrophysical data was employed to characterize rock properties ((elastic properties, Minimum horizontal stress (SHmin) and rock strength)).The results indicate that drilling horizontal and short radius wells parallel to the SHmax direction is optimal for maximizing well stability and minimizing the risk of wellbore instability. This approach also minimizes the required mud weight, thereby reducing the risk of formation damage. Furthermore, fracturing operations should be oriented perpendicular to SHmax, i.e., in the SHmin direction, to maximize fracture opening and enhance production. This study provides valuable insights for optimizing well trajectories and fracturing designs, leading to improve drilling efficiency and enhancing hydrocarbon recovery in the Illizi basin.</p>

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Geomechanical Prediction in Determining the Stress Regime in the Choice of Directional Drilling and Hydraulic Fracturing: Case Study of South-Eastern Algeria (Comprehensive Analysis)

  • 期刊论文

  • 发表日期：

    2025年5月2日

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  • Chehili Djamel,
  • Sadek Kaddour,
  • Rahmani Badr Eddine,
  • Serhane Brahmi,
  • Aour Benaoumeur,
  • Bendali Mehdi

摘要

A comprehensive geomechanical analysis has a critical implication in various phases of field development based on a thorough understanding of the stress regime and mechanical properties of the rocks. The main objective of this study is to determine the in-situ stress regime in Illizi basin by building a credible and suitable geomechanical model for more decision making in the choice of new well drilling and well fracturing. The analysis involved estimating the principal stress tensor (vertical stress (sv), horizontal stress (SH) and pore pressure (PP)), data from nine wells, including wireline logs, core measurements, and petrophysical data was employed to characterize rock properties ((elastic properties, Minimum horizontal stress (SHmin) and rock strength)).The results indicate that drilling horizontal and short radius wells parallel to the SHmax direction is optimal for maximizing well stability and minimizing the risk of wellbore instability. This approach also minimizes the required mud weight, thereby reducing the risk of formation damage. Furthermore, fracturing operations should be oriented perpendicular to SHmax, i.e., in the SHmin direction, to maximize fracture opening and enhance production. This study provides valuable insights for optimizing well trajectories and fracturing designs, leading to improve drilling efficiency and enhancing hydrocarbon recovery in the Illizi basin.