A New Model for Prediction of Wellbore Stability Using the Three Dimensional Hoek–Brown Failure Criterion

Mohammad Tabaeh Hayavi; Mohammad Abdideh

International Journal of Geological and Geotechnical Engineering

A New Model for Prediction of Wellbore Stability Using the Three Dimensional Hoek–Brown Failure Criterion

Abstract

Wellbore stability is one of the crucial issues in oil and gas industries. The issues related to instability of wells, impose significant unwanted costs on drilling operation.The objective of this paper is to present the 3D-wellbore stability prediction models for vertical wellbores. The three dimensional Hoek–Brown strength criterion developed by Zhang and Zhu conjunction with linear poroelastic constitutive model is utilized to develop the models. This models leads to easily computed expression for the critical mud pressure required to maintain wellbore stability. The analytical model is applied to real field case in order to verify the applicability of the developed models.The results indicate that the decreasing of the Biot’s coefficient and increasing the UCS and/or Poisson’s ratio will increase the optimum mud pressure window. Furthermore, this window is a function of depth.

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How to cite

Mohammad Tabaeh Hayavi, Mohammad Abdideh. A New Model for Prediction of Wellbore Stability Using the Three Dimensional Hoek–Brown Failure Criterion. International Journal of Geological and Geotechnical Engineering. 2017;3(2):10–15.

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A New Model for Prediction of Wellbore Stability Using the Three Dimensional Hoek–Brown Failure Criterion

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