1 - 6 of 6 Chapters
[Lost circulation is a wellbore instability problem that has plagued the drilling industry for years. Wellbore strengthening is recognized as an effective technique to prevent or mitigate lost circulation. This chapter introduces the common scenarios and consequences of lost circulation, as well...
[Analyses of lost circulation and wellbore strengthening require knowledge of formation and wellbore geomechanics. This chapter provides a brief overview of some geomechanical concepts related to the subject, including in-situ stress, pore pressure, wellbore stress concertation, wellbore failure...
[The ability to model fracture growth during lost circulation is critical for loss prevention and wellbore strengthening design. Such a model can provide useful information for the optimization of drilling fluid rheology, well configuration, pump schedule, and LCM particle size distribution. In...
[This chapter presents theoretical models for the evaluation of wellbore strengthening based on plugging/bridging lost circulation fractures using LCMs. An analytical model and a finite-element numerical model are presented. The analytical model is developed based on linear elastic fracture...
[Numerous LCMs have been proposed for curing lost circulation. However, due to the complexity of formation properties and fluid loss mechanisms, there is not a universal LCM suitable to all types of losses. The selection of LCMs is highly dependent on the formation types, fluid loss mechanisms...
[Although there have been a lot of studies dedicated to lost circulation control and great successes have been achieved, the problem continues, with the increasing drilling operations in more complicated environments. Knowledge gaps and unsolved problems still exist and the need for further...
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