Reservoir Geomechanics Homework Solutions

This interdisciplinary course encompasses the fields of rock mechanics, structural geology, earthquake seismology and petroleum engineering to address a wide range of geomechanical problems that arise during the exploitation of oil and gas reservoirs.

The course considers key practical issues such as prediction of pore pressure, estimation of hydrocarbon column heights and fault seal potential, determination of optimally stable well trajectories, casing set points and mud weights, changes in reservoir performance during depletion, and production-induced faulting and subsidence. The first part of the course establishes the basic principles involved in a way that allows readers from different disciplinary backgrounds to understand the key concepts.

The course is intended for geoscientists and engineers in the petroleum and geothermal industries, and for research scientists interested in stress measurements and their application to problems of faulting and fluid flow in the crust.


Introductory Geology and Geophysics
Familiarity with principles of drilling and petroleum production

ResGeo 202 Reservoir Geomechanics Spring 2017, Stanford Online Homework 6 – Constraining Stress Magnitudes from Wellbore Failure Due 23 May 2017, 07:30 UTC Please direct any questions to the Piazza discussion forum on the course website Note that the deadline is in Coordinated Universal Time (UTC). If you want to see the current time in UTC, please google: “Current time in UTC.” Background In this assignment, you will build a stress polygon diagram to constrain the possible stress magnitudes for sample data from the Barnett shale. The image logs from which the fractures were picked in Homework 5 showed no signs of drilling induced tensile fractures or wellbore breakouts. Use these key observations of the lack of wellbore failure combined with the relations for borehole stresses and frictional faulting theory to construct a stress polygon or ‘Zoback-o-gram’. Utilize a scientific computing or plotting program such as Microsoft Excel or MATLAB to follow the steps below. Then, answer the questions on the webpage below this .PDF

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