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How Safe Are You Drilling? - Novel Velocity Model Building Methods For Mitigating Drilling HazardsNormal access

Authors: S. Roy and C. Esmersoy
Event name: First EAGE/PESGB Workshop on Velocities
Session: Improving Input for Velocity Model Updates
Publication date: 22 February 2018
DOI: 10.3997/2214-4609.201800016
Organisations: EAGE
Language: English
Info: Extended abstract, PDF ( 727.58Kb )
Price: € 20

A detailed understanding of velocities in the overburden is critical for the planning and successful drilling of wells. An accurate 3D velocity model can play an important role in identifying potential drilling hazards along the well path. It is well known that pre-drill estimates of velocity (and hence predicted formation properties and structural images) have inherent uncertainties. In this paper, advanced model building methods are presented which make use of well measurements and regional geological knowledge as constraints to high-resolution model building techniques. These methods can provide improved confidence in drilling activities and mitigate drilling hazards by reducing uncertainties, identifying drilling hazards ahead of the bit, interpreting high-resolution structural images, and reducing nonproductive time and drilling cost.

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