3D Geomechanical Model Construction for Wellbore Stability Analysis in Algerian Southeastern Petroleum Field

Said Eladj, Mohamed Zinelabidine Doghmane, Tanina Kenza Lounissi, Mabrouk Djeddi, Kong Fah Tee and Sofiane Djezzar ()
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Said Eladj: Laboratory of Physics of the Earth (LABOPHYT), Faculty of Hydrocarbons and Chemistry, University M’Hamed Bougara of Boumerdes, Boumerdes 35000, Algeria
Mohamed Zinelabidine Doghmane: Department of Geophysics, FSTGAT, University of Sciences and Technology Houari Boumedienne, Bab Ezzouar, Algiers 16000, Algeria
Tanina Kenza Lounissi: Laboratory of Physics of the Earth (LABOPHYT), Faculty of Hydrocarbons and Chemistry, University M’Hamed Bougara of Boumerdes, Boumerdes 35000, Algeria
Mabrouk Djeddi: Laboratory of Physics of the Earth (LABOPHYT), Faculty of Hydrocarbons and Chemistry, University M’Hamed Bougara of Boumerdes, Boumerdes 35000, Algeria
Kong Fah Tee: School of Engineering, University of Greenwich, Kent ME4 4TB, UK
Sofiane Djezzar: Petroleum Engineering Department, University of North Dakota (UND), Grand Forks, ND 58202, USA

Energies, 2022, vol. 15, issue 20, 1-16

Abstract: The main objective of this research work was the wellbore stability evaluation of oil and gas wells based on a 3D geomechanical model, which as constructed using seismic inversion in a southeastern Algerian petroleum field. The seismic inversion model was obtained by using an iterative method and Aki and Richards approximation. Since the correlation between the inversion model and the log data was high at the wells, the reservoir was efficiently characterized and its lithology carefully discriminated in order to build a reliable 3D geomechanical model. The latter was further used to suggest the drilling mud weight window for the ongoing wells (well 5) and to examine the stability of four previously drilled wells. The main contribution of this study is providing a 3D geomechanical model that allows the optimization of drilling mud weight parameters so that a wellbore’s stability is guaranteed, on the one hand, and, on the other hand, so that the reservoir damage brought about by excessive surfactant use can be prevented. Indeed, the mud parameters are not just important for the drilling process’s effectiveness but also for logging operations. Since the tools have limited investigation diameters, with excessive use of surfactant, the invaded zone can become larger than the tools’ investigation diameter, which makes their logs unreliable. Hence, the 3D geomechanical model presented here is highly recommendable for the proposition of new wells, entailing less exploration uncertainty and more controllable productivity.

Keywords: 3D geomechanical model design; wellbore stability analysis; Algerian petroleum field; Roy White approximation (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2022
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