Methods and systems for determining formation properties and in-situ stresses

A method for determining a property of a formation, comprising:

• deriving formation parameters from a formation radial profiling;
• obtaining formation log data that comprise formation density data;
• estimating formation stresses from the formation log data;
• and
• deriving a radial stress profile based on a formation model, the derived formation parameters, and the estimated formation stresses.

A system for determining a property of a formation, comprising:

• a computer system having a memory for storing a program including instructions for:
• obtaining radial formation property measurements at different wellbore pressures;
• generating a radial stress profile based on a formation model;
• generating a radial stress function from the radial stress profile;
• and
• comparing the radial formation property measurements with the radial stress function to determine a formation strength.

A system for determining a property of a formation, comprising:

• a computer system having a memory for storing a program including instructions for:
• deriving formation parameters from a formation radial profiling;
• obtaining formation log data that comprise formation density data;
• estimating formation stresses from the formation log data;
• and
• deriving a radial stress profile based on a formation model, the derived formation parameters, and the estimated formation stresses.