Loading...
Geomechanics model for wellbore stability analysis in field "X" North Sumatra Basin
Adham, Aidil
Adham, Aidil
Citations
Altmetric:
Advisor
Editor
Date
Date Issued
2016
Date Submitted
Keywords
Collections
Research Projects
Organizational Units
Journal Issue
Embargo Expires
2017-06-29
Abstract
Wellbore instability problems significantly contribute in increasing the cost of drilling and operations of the oil and gas industry. These problems can occur in a variety of forms including stuck pipe, loss circulation, hole enlargement, unintentionally induced tensile fractures or difficult directional control incidents. In this research, we investigate the wellbore instability issues in Field “X”, a mature oil and gas sandstone reservoir located in North Sumatra, Indonesia. An integrated wellbore-stability study was implemented to avoid wellbore instability problems in this field. To narrow down the possible causes of wellbore instabilities in this field, a problem-diagnostic scheme was done by analyzing well logging data, drilling reports, mud logging reports, and pore pressure measurements. The availability of data is the main problem to deliver a good geomechanical model. Numerous methods for data acquisition were discussed in this study to gather reliable geomechanics data as inputs for the model, especially log based methods. Geomechanics model was coupled with mechanical stress, temperature alteration, chemical iteration effects, and flow induced stress using Mohr-Coulomb and Mogi-Coulomb failure criteria. A numerical model was build using MATLAB programming software that results the critical mud weight to avoid wellbore breakout and tensile failure in arbitrary wellbore inclination and azimuth.
Associated Publications
Rights
Copyright of the original work is retained by the author.