Schlumberger Technology Corporation

Randy Koepsell

Tom R Bratton

Tom Olsen

Adam Donald

A method for performing wellbore operations of a field having a subterranean formation. The method includes determining, based on an image log of a wellbore penetrating the subterranean formation, a plurality of interpreted geological surfaces, identifying a plurality of estimated slickensides from the plurality of interpreted geological surfaces based on at least one pre-determined criterion, calculating, using a processor, a differential stress using a curvature model representing at least one mechanical unit defined by the plurality of estimated slickensides, generating a stress model using the differential stress, identifying a modeled wellbore stress-induced failure in response to a total stress value in the stress model exceeding a strength property of the subterranean formation, determining a difference between the modeled wellbore stress-induced failure and an observed stress-induced failure in the subterranean formation, and updating the stress model by adjusting the plurality of estimated slickensides to, in turn, adjust the difference.

Determining differential stress based on formation curvature and mechanical units using borehole logs

A method is disclosed for generating a wellsite design, comprising: designing a workflow for an Earth Model; building an initial Earth Model based on the workflow adapted for modeling drilling and completions operations in a hydrocarbon reservoir; calibrating the initial Earth Model thereby generating a calibrated Earth Model; and generating the wellsite design using the calibrated Earth Model.

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Highlands Ranch, CO, United States of America

Randy Koepsell