Method to predict pore pressure and seal integrity using full wavefield inversion

A method, comprising:

• generating a velocity model for a subsurface region of the Earth by using one or more full wavefield inversion processes;
• generating an impedance model for the subsurface region of the Earth by using one or more full wavefield inversion processes;
• estimating pore pressure at a prediction site in the subsurface region by integrating the velocity model and the impedance model with a velocity-based pore pressure estimation process, wherein the prediction site includes a reservoir rock, and wherein the velocity-based pore pressure estimation process comprises:
• identifying, within the impedance model, the reservoir rock;
• using the velocity model to determine or estimate shale pore pressure at a base of the reservoir rock in the impedance model;
• determining a buoyancy pressure of a fluid assumed to fill a column height of the reservoir rock;
• and
• the estimating the pore pressure for the reservoir rock includes combining the shale pore pressure at the base of the reservoir rock and the buoyancy pressure;
• charactering a mechanical seal integrity of the subsurface region using the estimated pore pressure;
• and
• managing hydrocarbons in the subsurface region using the estimated pore pressure and mechanical seal integrity.