Wellbore stability

The paper presents a theory of the “plane of weakness” modelling applied to a deviated borehole that penetrated through laminated shale containing numerous parallel weakness planes. The obtained results show that the strength envelope for anisotropic rock is characterised by a U-shaped reduction in strength for failure along the weakness plane, confining pressure from 20 MPa to 80 MPa whithout any change in the failure mechanism of the shale.

7p viharry 14-12-2022 15 4   Download

he objectives of study aim to analyse the stress and stability around a wellbore during petroleum activities. Therefore, in this paper the stress and stability analysis of a petroleum wellbore at a depth of 2800 m was carried out using the finite element code ANSYS®.

5p vimante2711 05-03-2020 18 1   Download