wellbore-stability

This Skill analyzes in-situ stress states, pore pressure, and rock strength to determine safe mud weight windows. It predicts borehole breakout and assesses fracture initiation risks using Kirsch equations, Mohr-Coulomb criteria, and Eaton's pore pressure method with Python scripts.

Wellbore stability analysis uses geomechanics to predict and prevent borehole instability issues like breakouts and fractures. By analyzing in-situ stresses and rock properties, it defines a safe drilling fluid weight window to ensure the wellbore remains stable throughout drilling.

You predict borehole breakout and fracture initiation risks by inputting log data and estimated stress gradients for your target depth. The Skill calculates vertical, minimum, and maximum horizontal stresses to evaluate shear and tensile failure limits based on rock strength.

Yes, you can use this geomechanics analysis for drilling in the Marcellus shale and Appalachian basin. The Skill includes reference data for Appalachian basin conditions and supports calculating safe mud weight windows at specific depths like 7,500 ft TVD.

To perform stress state analysis and pore pressure calculations, you need log data, estimated stress gradients, and uniaxial compressive strength (UCS) values. The Skill uses Eaton's pore pressure method and Mohr-Coulomb criteria to process these inputs into a safe mud weight window.