@inproceedings{scholars4858, year = {2014}, journal = {76th European Association of Geoscientists and Engineers Conference and Exhibition 2014: Experience the Energy - Incorporating SPE EUROPEC 2014}, publisher = {EAGE Publishing BV}, pages = {1736--1740}, note = {cited By 0; Conference of 76th European Association of Geoscientists and Engineers Conference and Exhibition 2014: Experience the Energy - Incorporating SPE EUROPEC 2014 ; Conference Date: 16 June 2014 Through 19 June 2014; Conference Code:107567}, doi = {10.3997/2214-4609.20140635}, address = {Amsterdam}, title = {Comparison of wellbore stability of UBD in the case of laser drilling and conventional operation}, keywords = {Boreholes; Drilling equipment; Elasticity; Elastoplasticity; Infill drilling; Oil field equipment; Optical properties; Sensitivity analysis; Stability; Structural design, Drilling methods; Elasto-plastic models; Equipment technology; Fractured carbonate reservoirs; Mechanical model; Numerical investigations; Wellbore instability; Wellbore stability, Underbalanced drilling}, url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-84907411007&doi=10.3997\%2f2214-4609.20140635&partnerID=40&md5=496c6d255c4bfe83c27d34e329313415}, abstract = {In recent years, growing interest in underbalanced drilling has resulted in the rapid development of its associated equipment technology, practices, and procedures. Underbalanced drilling is used to avoid lost circulation, formation damage, and decreasing weight on bit. However, the risk of wellbore collapse due to lake of hydrostatic mud pressure is high; therefore, using good geo-mechanical model may avoid wellbore instability problems. In order to evaluate the potential for wellbore instability, it is necessary to use an elastoplastic model to compute the stresses and strains around the bore hole. Furthermore, it should be mentioned that the laser drilling process depends extremely on the rock's geo-mechanical properties. This paper describes a numerical investigation of wellbore instability in a fractured carbonate reservoir that is verified with reservoir core samples. Some necessary conditions should be mentioned to gain the best method of comparison for conventional UBD and laser UBD operations. It is vital to evaluate the sensitivity of the wellbore stability by focusing on the effect of laser irradiation absorption. Finally, this paper fills the gap by paying attention to the sensitivity analysis and focuses on assessing the influence of various drilling methods, rock properties and optical fluid parameters.}, author = {Bazargan, M. and Nakhaee, A. and Koohian, A. and Irawan, S. and Habibpour, M. and Shahvar, M.}, isbn = {9781632666949} }