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Distribution of geomechanical units constrained by sequence stratigraphic framework: useful data improving reservoir characterization
Gharechelou, S.; Amini, A.; Bohloli, B.; Swennen, R.; Nikandish, A.; Farajpour, V. (2020). Distribution of geomechanical units constrained by sequence stratigraphic framework: useful data improving reservoir characterization. Mar. Pet. Geol. 117: 104398. https://hdl.handle.net/10.1016/j.marpetgeo.2020.104398
In: Marine and Petroleum Geology. Elsevier: Guildford. ISSN 0264-8172; e-ISSN 1873-4073, more
Peer reviewed article  
Available in  Authors 
Author keywords
    Geomechanical unit; Facies index; Fracture toughness; Sequence stratigraphic framework; Asmari Formation; SW Iran
Authors  Top 
  • Gharechelou, S.
  • Amini, A.
  • Bohloli, B.
  • Swennen, R., more
  • Nikandish, A.
  • Farajpour, V.
Abstract
    Rock mechanical studies of a hydrocarbon reservoir play a fundamental role before as well as after drilling and during different stages of a field lifecycle. This research focuses on the discrimination of geomechanical units (GMUs) in the Asmari Formation based on sedimentological and geomechanical properties. Sedimentological properties such as microfacies, diagenesis, texture, facies index (FI) and porosity distribution (pore size, pore shape, pore count and pore aspect ratio) and geomechanical parameters such as uniaxial compressive strength (UCS), fracture toughness (KIc), Biot's coefficient and brittleness index were considered. Sedimentological and diagenetic features and porosity were quantified based on FI concepts that was used for quantitative comparison with geomechanical data.

    Five GMUs were distinguished in the Asmari Formation that reflect ductile to brittle characteristics based on FI, UCS and KIc cross plots. According to the existing mechanical heterogeneities, the formation was hierarchically subdivided in zones by GMUs allowing to simplify its architecture. Since GMUs are restricted to borehole locations, by linking the latter to the sequence stratigraphic framework, the GMUs can be predicted at field scale because each GMU displays a specific position in the sequence stratigraphic succession. Finally, interpretation of mechanical units within sedimentary cycles and their hierarchy allows predicting engineering operations and propagate geomechanical dataset in the field.

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