Practical Petroleum Geomechanics with Techlog

Fundamentals of well-centric geomechanics

• Value of well-centric geomechanics in the petroleum industry
• Introduction to geomechanics concepts: The stress tensor, units, principal stresses, strain, resolving stresses on a plane, construct Mohr's Circle and analyze stress, elasticity and elastic properties, effective stress, internal friction, cohesion, modes of rock deformation, unconfined compressive strength, Mohr-Coulomb failure
• Techlog Introduction and basic exercises: General overview of Techlog, data loading and QC, building a mechanical stratigraphy

Rock mechanical properties and introduction to the Mechanical Earth model

• Introduction to experimental rock mechanics, uniaxial and triaxial testing, scratch testing, tensile tests, results analysis
• Concept and construction of the Mechanical Earth Model, data requiremens and types of input data
• Techlog exercises on modeling mechanical properties and calibration with core data
• Techlog basics of Acoustic log processing and QC
• Introduction to Python in Techlog and how to script locally-calibrated rock property correlations

1D Stress modeling (overburden, pore pressure and horizontal stresses)

• Principal earth stresses, regional and local stresses, World Stress Map, Andersonian classification of faults, overburden stress, horizontal stress orientation, borehole breakouts, drilling-induced tensile fractures, image logs, horizontal stress magnitudes, leak-off tests, fracture gradients
• Origins of pore pressure, methods for measurement, methods for estimation, vertical and horizontal methods, Eaton’s method, real-time approach
• Techlog exercises on modeling overburden, pore pressure and horizontal stress magnitude
• Introduction to Techlog image log functionalities and stress direction analysis

Wellbore stresses and wellbore stability

• Wellbore geomechanics, state of stress in the wellbore
• Modes of rock deformation in the wellbore, the effect of well azimuth and inclination, simple calculations
• An introduction to planning for wellbore stability and real time operations
• Techlog exercises to perform wellbore stability analysis from existing well trajectory, wellbore stability sensitivity analysis (safe mud weight window versus wellbore orientation), history matching of wellbore stability prediction to wellbore failure observations
• Introduction to reservoir geomechanics and the effects of pressure depletion on stresses
• Techlog exercises on horizontal stress estimation in depleted zones

Completions geomechanics

• Sand production prediction and sand management, causes of sand failure, experimental evidence, an introduction to screenless completion design for sand prevention
• Introduction to Hydraulic fracturing, process of hydraulic fracturing, geomechanical factors effecting fracture development and simple calculations
• Techlog exercise to use 1DMEM for sand production prediction