A Model-based Approach for Predicting Gas Well Leaks from Cemented Annulus and Identifying Well Construction Factors Responsible for Such Leaks

摘要

Gas leaks from natural gas wells can create severe environmental and safety problems, as the leaked gas may end up in the air or water. Poor cementing job and other well completion operations of gas wells may allow gas from one rock formation zone to migrate into another and eventually leave the well. Therefore, it is important to ensure that natural gas well construction prevents such unwanted events. The design objective is known as zonal isolation and has been the subject of intense study recently.