Patent ID: 7996199

Claim:
A method for performing an oilfield operation at a wellsite having a drilling rig configured to advance a drilling tool into a subsurface formation, comprising: generating, using a processor, a borehole temperature model by calculating estimated borehole temperatures for an area of interest using water depth information and a vertical stress model; generating, using the processor, a formation temperature model by calculating estimated formation temperatures for the area of interest using the estimated borehole temperatures of the borehole temperature model; generating, using the processor, a mud-weight pressure model by calculating mud-weight pressures for the area of interest using the formation temperatures of the formation temperature model and pressure coefficients; generating, using the processor, a formation pore pressure model by calculating formation pore pressures for the area of interest using the mud-weight pressures of the mud-weight pressure model; and adjusting the oilfield operation based on the formation pore pressure model.