1. Thick-Walled Cylinder

2. Thick-Walled Cylinders
Measure Expelled Fluid to Sense Changes in Internal Wellbore Volume
Increase Confining Pressure to Simulate Drawdown/Depletion/Underbalance
Thick-Walled Cylinders
Measure External Strain
Geometric Analog
Internal Monitoring Is Essential

3. This figure shows the two basic measurements made during the thick-walled cylinder testing. These are the volumetric strain sensed at the outer boundaries of the cylinder and the fluid expelled from the central wellbore (indicating changes in dimensions of this inner wellbore analog).

4. This figure shows the methodology for estimating the initiation and accelerated deformation from the volume of fluid expelled from a central wellbore during the thick-walled cylinder testing. Log-log plotting is used to emphasize inflections

5. Thick Walled Cylinder CT Scans
Pre-Test
Post-Test

6. Thick Walled Cylinder CT Scans
Pre-Test
Post-Test

7. Thick Walled Cylinder CT Scans
Pre-Test
Post-Test

8. Thick Walled Cylinder CT Scans
Pre-Test
Post-Test

9. Thick Walled Cylinder CT Scans
Pre-Test
Post-Test

10. Thick Walled Cylinder CT Scans
Pre-Test
Post-Test