Enhanced 1-D Method for Prediction of Mud Weight Window for Subsalt Well Section

摘要

System and method for predicting the mud weight window in formations, particularly those formations having geologic structures such as salt domes. One embodiment is a computer-implemented method of modeling a formation in 3-D and determining a plurality of effective stress ratios for the modeled 3-D formation using finite element analysis. Thereafter, the trajectory of a proposed wellbore through the 3-D modeled formation is plotted and the specific effective stress ratios along the wellbore are selected to form a data set. The 3-D data set of effective stress ratios is then imported into 1-D modeling software and combined with 1-D data. The combined data is thereafter utilized to estimate the mud weigh window for the formation around the wellbore.

主权项

1. A computer-implemented method for identifying the mud weight window of a formation, the method comprising:
modeling the formation in 3-D; determining a plurality of effective stress ratios for the modeled 3-D formation; plotting a trajectory for a wellbore through the modeled 3-D formation; selecting specific effective stress ratio values along the wellbore trajectory; importing the selected effective stress ratio values into a 1-D model for estimating mud weight windows; combining the imported 3-D data with 1-D data utilizing the 1-D model; and estimating the mud weight window for the formation.