| Abstrakt: |
Casing is considered one of the main well barrier elements to keep well integrity. Casing wear reduces the casing thickness and hence reduces the well integrity. Therefore, the aim of this article is to predict the reduction in wall metal quantity of the casing for horizontal wells. The connection between the hydrocarbons well design (well path, dog leg severities, casing design, loads in drilling string) and the casing wear is explained, with the related consequences which are resulting off this undesired phenomenon. Furthermore, the wellbore trajectory is optimized and the dogleg severity is computed in order to determine casing wear. Drillstring loads' distribution are also determined. A sensitivity analysis is implemented in order to show the impact of weight on bit (WOB), drillstring rotation (RPM), rate of penetration (ROP), and wear factor (WF) on casing wear prediction. A horizontal well WP1A is taken and studied to predict the casing wear. The maximum DLS resulted in this well is 12°/30m. The higher the RPM values, the higher WOB, the higher WF, and the lower ROP are; the higher casing wear, the higher reduction of casing thickness and the higher probability to loss well integrity are. [ABSTRACT FROM AUTHOR] |
