OMV Exploration & Production
Move & More.
MWD/LWD and Well Logging Data for Geomechanical Model Building
11. FKPE Workshop- Bohrlochgeophysik und Gesteinsphysik in Hannover am 06.-07.10.2011Michael J. Blum senior petrophysicist
OMV E&P PE-Formation Evaluation
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Objectives
� The Geomechanical Model� Building a Geomechanical Model : Generic Workflow
� Using Core information� Formation Strength Evaluation� Overburden Gradient Calculation� Pore Pressure Prediction� Stress Orientation� Maximum Horizontal Stress Magnitude
� Conclusions
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The Geomechanical Model
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Building a Geomechanical Model (GEM): Generic Workflow
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Using Core tests
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Using Core Photos and LWD images
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Formation strength evaluation : Pros and Cons
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Dynamic Elastic Constants
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Calculation of Overburden Gradient
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Pore pressure prediction: Normal compaction trends
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Pore pressure prediction: Wireline/MWD response to overpressure
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Pore Pressure Prediction : Example
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Stress Orientation: Near Wellbore Stresses
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Maximum Horizontal Stress Magnitude : Input data instead of image log
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Maximum Horizontal Stress Magnitude : Sonic Scanner
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Conclusions
� Petrophysical logs are valuable for geomechanical modeling� Logs are required for evaluation of formation strength, pore
pressure,stress direction, and maximum horizontal stress magnitude� Most important LWD or Wireline Logs for Geomechanics include GR,
density, sonic, resistivity, caliper and borehole image logs, withoutthem it is not possible to establish a reasonable Geomechanicalmodel
� High quality log data results are essential for a high accuracygeomechanical model