Depot Institutionnel de l'UMBB >
Publications Scientifiques >
Publications Internationales >
Veuillez utiliser cette adresse pour citer ce document :
http://dlibrary.univ-boumerdes.dz:8080/handle/123456789/6162
|
Titre: | Characterization of pore pressure, fracture pressure, shear failure and itsimplications for drilling, wellbore stability and completion design–A casestudy from the Takouazetfield, Illizi Basin, Algeria |
Auteur(s): | Baouche, Rafik Souvik, Sen Boutaleb, Khadidja |
Mots-clés: | In-situ stress magnitude Stress orientation Pore pressure Fault reactivation Illizi basin |
Date de publication: | 2020 |
Editeur: | Elsevier |
Collection/Numéro: | Journal of Structural Geology Volume 132, March 2020, 103975; |
Résumé: | We analyzed drilling induced tensile fractures from resistivity image log data to ascertain the orientation of
maximum horizontal stress (SH) from the eastern Illizi basin, Algeria. An average SH azimuth of 150�N (� 10�)
has been interpreted from B-quality induced fractures, as per world stress map guidelines. The overall NW-SE
orientation of SH translates to the relative plate motion of the African and Eurasian plates. Vertical stress (Sv)
gradient of 1.07 PSI/ft has been derived from density log. Pore pressure estimated from sonic slowness reveals
overpressure in Silurian shale, deposited in a transgressive depositional environment, whereas Devonian and
Ordovician hydrocarbon reservoirs have been seen to be normally pressured. Poroelastic strain model has been
employed to quantify maximum and minimum horizontal stress (Sh) magnitudes. An effective stress ratio of 0.6,
interpreted from leak-off test has also been used to model Sh. Using frictional faulting theory, upper limit of SH
has been quantified. SH/Sv ratio of 1.04 (1.01–1.26) has been seen in the study area. Based on the relative stress
magnitudes (SH > Sv > Sh), a present day strike-slip faulting regime has been inferred in the eastern Illizi basin,
Algeria. Fault reactivation potential at reservoir level has been inferred from stress polygon analysis. |
URI/URL: | https://www.sciencedirect.com/science/article/abs/pii/S0191814119305103 http://dlibrary.univ-boumerdes.dz:8080/handle/123456789/6162 |
ISSN: | 0191-8141 |
Collection(s) : | Publications Internationales
|
Fichier(s) constituant ce document :
|
Tous les documents dans DSpace sont protégés par copyright, avec tous droits réservés.
|