专利名称：Determining a limit of failure in a wellbore
wall
发明人：Marcelo Frydman申请号：US13863572申请日：20130416公开号：US09646115B2公开日：20170509
专利附图：
摘要：A method to determine a drilling fluid density limit involves obtaining ageomechanical model of a target borehole, generating a depth of damage model of thetarget borehole to describe a relationship between a drilling fluid pressure and a depth
of damage representing a modeled amount of yielded rock surrounding the targetborehole, where the modeled amount of the yielded rock is calculated using a stressmodel according to a pre-determined failure criterion, and calculating, using the depth ofdamage model and the geomechanical model, the drilling fluid density limit as a functionof the subterranean formation depth, where the drilling fluid density limit maintains thedepth of damage at a target level for the target borehole, where the drilling fluiddensity limit corresponds to a depth gradient of the drilling fluid pressure, where thetarget borehole is drilled based at least on the drilling fluid density limit.
申请人：Schlumberger Technology Corporation
地址：Sugar Land TX US
国籍：US
代理人：Mitchell M. Blakely
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