Method and apparatus for combined NMR and formation testing for assessing relative permeability with formation testing and nuclear magnetic resonance testing

A method for determining relative permeability for a formation comprising:

• determining a saturation value for a location in a formation;
• measuring a pressure value for the location in the formation;
• and
• determining the relative permeability for the formation from the saturation value and the pressure value at the location in the formation.

A method for calculating formation productivity comprising:

• deploying an NMR and pressure measuring device in a borehole adjacent a formation;
• measuring mobility for a location in the formation by pressure testing;
• measuring saturation level for the location by NMR;
• and
• calculating permeability for the measured mobility and saturation at the formation location.

A method for determining relative permeability in a formation comprising:

• injecting a fluid having a known viscosity into a formation location;
• determining saturation level using a tool to determine saturation level in the formation location;
• measuring pressure responses in the formation;
• injecting additional fluid into the formation to change the saturation level in the formation;
• determining saturation levels in the formation;
• and
• determining relative permeability.