Using different rock failure criteria in wellbore stability analysis

Autor:	Ayub Elyasi, Kamran Goshtasbi
Rok vydání:	2015
Předmět:	Petroleum engineering Field data Drilling Mohr–Coulomb theory Geotechnical Engineering and Engineering Geology Stability (probability) Wellbore Drilling fluid Fish Geotechnical engineering Computers in Earth Sciences Rock failure Safety Risk Reliability and Quality Geology
Zdroj:	Geomechanics for Energy and the Environment. 2:15-21
ISSN:	2352-3808
DOI:	10.1016/j.gete.2015.04.001
Popis:	The minimum and the maximum allowable drilling mud pressures for two wellbores are calculated analytically by Mohr–Coulomb, Hoek–Brown and Mogi–Coulomb failure criteria and numerically using a Fish program which is implemented in FLAC. The allowable drilling mud pressures that resulted from these methods are compared with each other and then with the field data: two wellbores in two Iranian oilfields are investigated as case studies to assess the results. Finally the criterion that matches closely field data is identified. It is shown that the minimum allowable drilling mud pressure obtained from the Mogi–Coulomb criterion is close to actual data collected during drilling operation. Hence, this criterion is considered more appropriate for wellbore stability analysis than the other two criteria.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::71d41f925fe43d12de9713221fda9ae9 https://doi.org/10.1016/j.gete.2015.04.001 Zobrazit plný text záznamu Full Text from ScienceDirect