SOLID GEO MECHANICAL INVESTIGATION OF THE EFECT OF SALT CREEP ON CASING STABILITY USING FNITE ELEMENT METHOD: A CASE STUDY

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dc.contributor.authorMohammadi, Saheb
dc.contributor.authorSedaghatzadeh, Mostafa
dc.contributor.authorPourafshary, Peyman
dc.date.accessioned2021-08-27T06:20:24Z
dc.date.available2021-08-27T06:20:24Z
dc.date.issued2020-06-22
dc.description.abstractThe salt formation creeping can signifcantly afect the casing stability, because of the changes in mechanical and geome chanical parameters. The creeping of Gachsaran salty formation in the south part of Iran has infuences on wells drilled in the region, which should be carefully considered in the casing design process. In this study, the fnite element analysis technique was applied to study the alteration in mechanical/geomechanical parameters of a well in this formation. The accuracy of the methodology was validated by data available from the reduction in wellbore diameter of another well in the formation. Diferent scenarios were studied to analyze the efect of geomechanical parameters on stress, plastic strain, and casing diameter for a cased cemented well and a well completed with two casings. The efect of mechanical parameters on casing collapse was studied, where casing eccentricity, ovality, and slenderness ratio were also considered. Our simulation studies showed that casing stability in salty formations is strongly afected by geomechanical and pipe mechanical parameters. To reduce the severity of the casing collapse in salty formation, it is recommended to complete the well with two casings. Our study showed that, this arrangement reduces the plastic strain and the change in casing diameter signifcantly For a safe casing design, efect of mechanical parameters should be also considered. Efects of parameters such as ovality, eccentricity, and slenderness ratio are noticeable, for example, 2% ovality and 2% eccentricity in L-80 casing, lead to increase in the plastic strain from 0.112 to 0.31 and 0.3, and the overall diameter reduction from 0.455″ to 0.685″ and 0.535″, respectively.en_US
dc.identifier.citationMohammadi, S., Sedaghatzadeh, M., & Pourafshary, P. (2020). Solid-geo-mechanical investigation of the effect of salt creep on casing stability using finite element method: a case study. SN Applied Sciences, 2(7). https://doi.org/10.1007/s42452-020-3083-7en_US
dc.identifier.urihttp://nur.nu.edu.kz/handle/123456789/5719
dc.language.isoenen_US
dc.publisherSN Applied Sciencesen_US
dc.rightsAttribution-NonCommercial-ShareAlike 3.0 United States*
dc.rights.urihttp://creativecommons.org/licenses/by-nc-sa/3.0/us/*
dc.subjectType of access: Open Accessen_US
dc.subjectSalt creepen_US
dc.subjectCasing stabilityen_US
dc.subjectCasing designen_US
dc.subjectSolid mechanicsen_US
dc.subjectGeomechanicsen_US
dc.subjectFinite element methoden_US
dc.titleSOLID GEO MECHANICAL INVESTIGATION OF THE EFECT OF SALT CREEP ON CASING STABILITY USING FNITE ELEMENT METHOD: A CASE STUDYen_US
dc.typeArticleen_US
workflow.import.sourcescience

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