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Titre: | Geomechanical and Petrophysical Assessment of the Lower Turonian Tight Carbonates, Southeastern Constantine Basin, Algeria: Implications for Unconventional Reservoir Development and Fracture Reactivation Potential |
Auteur(s): | Baouche, Rafik Souvik, Sen Radwan, Ahmed |
Mots-clés: | Geomechanical characterization In situ stress Lower Turonian Unconventional reservoir Tight carbonates Fracture reactivation Constantine Basin |
Date de publication: | 2022 |
Editeur: | MDPI |
Collection/Numéro: | Energies 2022, 15(21), 7901; |
Résumé: | In this study, we assessed the unconventional reservoir characteristics of the Lower Turonian
carbonates from the southeastern Constantine Basin. We integrated petrography, petrophysical, and
rock-mechanical assessments to infer formation properties and unconventional reservoir development
strategies. The studied fossiliferous argillaceous limestones are rich in planktonic foraminifera,
deposited in a calm and low energy depositional condition, i.e., deep marine basinal environment.
Routine core analysis exhibits very poor porosity (mostly < 5%) and permeability (<0.1 mD), implying
the dominance of nano and microporosity. Micritization and calcite cementation are inferred as
the major reservoir quality-destroying diagenetic factors. Based on the wireline log-based elastic
properties, the upper part of the studied interval exhibits higher brittleness (BI > 0.48) and fracability
(FI > 0.5) indices compared to the lower interval. Borehole breakouts indicate ~N-S SHmax orientation
and a normal to strike-slip transitional stress state has been constrained based on a geomechanical
assessment. We analyzed safe wellbore trajectory and minimum mud weight requirements to ensure
stability in the deviated and horizontal wells required for field development. At the present stress
state, none of the fracture orientations are critically stressed. We inferred the fracture reactivation
potential during hydraulic stimulation required to bring the tight Turonian limestones into production.
Additional pore pressure build-up required to reactivate |
URI/URL: | https://doi.org/10.3390/en15217901 http://dlibrary.univ-boumerdes.dz:8080/handle/123456789/12062 |
Collection(s) : | Publications Internationales
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