Wellbore stability analysis to determine the safe mud weight window for sandstone layers

作     者：DARVISHPOUR Ayoub CHERAGHI SEIFABAD Masoud WOOD David Anthony GHORBANI Hamzeh DARVISHPOUR Ayoub;SEIFABAD Masoud Cheraghi;WOOD David Anthony;GHORBANI Hamzeh

作者机构：Department of Mining EngineeringIsfahan University of TechnologyIsfahan ***Iran DWA Energy LimitedLincolnLN59JPUnited Kingdom Southern Oil FieldsNational Iranian Oil CompanyTeheran ***Iran 

出 版 物：《Petroleum Exploration and Development》 (石油勘探与开发（英文版）)

年 卷 期：2019年第46卷第5期

页      面：1031-1038页

核心收录：

学科分类：0820[工学-石油与天然气工程] 082001[工学-油气井工程] 08[工学] 

主　　题：wellbore stability wellbore geomechanical property safe mud weight window wellbore instability risk factors drilling stress simulation 

摘      要：The wellbore stability of a vertical well through the sandstone reservoir layers of the Asmari oil-bearing formation in south-west Iran is *** safe drilling-fluid density range for maintaining wellbore stability is determined and simulated using FLAC3 D software and a finite volume model established with drilled strata geomechanical *** initiation of plastic condition is used to determine the safe mud weight window(SMWW)in specific sandstone *** effects of rock strength parameters,major stresses around the wellbore and pore pressure on the SMWW are investigated for this *** analysis reveals that a reduction in cohesion and internal friction angle values leads to a significant narrowing of the *** the other hand,the reduction of pore pressure and the ratio between maximum and minimum horizontal stresses causes the SMWW to widen *** ability to readily quantify changes in SMWW indicates that the developed model is suitable as a well planning and monitoring tool.