Method to Design Expandable Cement Based upon Specified Downhole Conditions

摘要

A method of performing a cementing operation with an expandable cement deployable into a wellbore penetrating a subterranean formation is provided. The method involves determining design parameters of a wellsite, determining at least one estimated eigenstrain of the expandable cement based on the design parameters, selecting the expandable cement based on the estimated eigenstrain, and validating the selected expandable cement by comparing the estimated eigenstrain with the empirical eigenstrain. The design parameters includes a minimum pre-stress of the wellbore sufficient to prevent creation of a microannulus in the wellbore. The estimated eigenstrain is sufficient to generate the determined minimum pre-stress.

主权项

1. A method of performing a cementing operation with an expandable cement deployable into a wellbore penetrating a subterranean formation, the method comprising:
determining design parameters of a wellsite, the design parameters comprising a minimum pre-stress of the wellbore sufficient to prevent creation of a microannulus in the wellbore; determining at least one estimated eigenstrain of the expandable cement based on the design parameters, the at least one estimated eigenstrain sufficient to generate the determined minimum pre-stress; selecting the expandable cement based on the at least one estimated eigenstrain; and validating the selected expandable cement by comparing the at least one estimated eigenstrain with the at least one empirical eigenstrain.