Depot Institutionnel de l'UMBB >
Publications Scientifiques >
Publications Internationales >
Veuillez utiliser cette adresse pour citer ce document :
http://dlibrary.univ-boumerdes.dz:8080/handle/123456789/12055
|
Titre: | Modeling In-situ tectonic stress state and maximum horizontal stress azimuth in the Central Algerian Sahara – A geomechanical study from El Agreb, El Gassi and Hassi Messaoud fields |
Auteur(s): | Baouche, Rafik Sen, Souvik Chaouchi, Rabah Ganguli, Shib Sankar |
Mots-clés: | In-situ stresses Maximum horizontal stress Stress orientation Image logs Breakouts Saharan Algeria |
Date de publication: | 2021 |
Editeur: | Elsevier |
Collection/Numéro: | Journal of Natural Gas Science and Engineering, Vol. 88 (2021) 103831;pp. 1-15 |
Résumé: | Central Algerian Sahara hosts many prolific hydrocarbon accumulations in the Paleozoic successions. In this
work a contemporary stress field of the Saharan platform has been evaluated using the dataset from recently
drilled wells in El Agreb, El Gassi and Hassi Messaoud fields. A pore fluid pressure gradient of 0.56 PSI/feet is
interpreted from the in-situ measurements in the Paleozoic reservoir units. Vertical stress (Sv) modeled from the
bulk-density data indicates an average of 1.02 PSI/feet gradient. Rock elastic property-based approach is
employed to model the magnitudes of minimum (Shmin) and maximum horizontal stress (SHmax) components,
which were calibrated with leak off test/minifrac and breakout widths, respectively. Paleozoic stress profiles
reveal Shmin/Sv range of 0.74–0.84, while SHmax/Sv varies between 1.1 and 1.33. Subsurface stress distribution
indicates that the present-day stress field in the Saharan platform is principally strike-slip faulting (SHmax > Sv >
Shmin). A cumulative 1490 m of B-D quality wellbore breakouts, inferred from the acoustic image logs, suggest a
NW-SE/WNW-ESE SHmax orientation, which is parallel to the absolute African plate motion and Africa-Eurasia
plate convergence direction, implying ridge push force to be the dominant contributor to the tectonic stress
field. Mean SHmax orientation shows slightly anticlockwise rotation (126◦N to 144◦N) from south (El Agreb) to
north (Hassi Messaoud field). Inferences are discussed regarding the fault slip potential and hydrocarbon
reservoir development. |
URI/URL: | https://doi.org/10.1016/j.jngse.2021.103831 http://dlibrary.univ-boumerdes.dz:8080/handle/123456789/12055 |
Collection(s) : | Publications Internationales
|
Fichier(s) constituant ce document :
Il n'y a pas de fichiers associés à ce document.
|
Tous les documents dans DSpace sont protégés par copyright, avec tous droits réservés.
|