In-situ stresses: Overburden and Minimum/Maximum Horizontal Stresses.
Underground rocks and sediments are subjected stresses, the principal ones being:
- Vertical stress
- Minimum horizontal stress
- Maximum horizontal stress
It is critical to identify the magnitude and direction of the horizontal stresses to understand stresses that are subjected to an element of rock in the formation. This information is vital in determining several parameters to have a successful drilling, fracturing, water injection and etc. operation.
The three principal compressive stresses.
Depending on the order of the principal stresses, different stresses regime can be identified which can be related to different fault regimes as defined by Andersonian tectonic regime