What tools are you using for simulation and extraction? Dependent on that you have different means of back-annotation to your original schematic/layout and can (or cannot) directly probe in the extracted view (PVS/Assura). Using calibre requires a different approach.
Are you doing RC extraction or just capacitive extraction? The latter is a bit simpler as the node names are often consistent. But since you aim for DC operating points, I assume you run R extraction of some kind.