Challenge: Due to issues related to troublesome Nahr Umr shale section, the
operator required a High Performance Water Base Mud (HPWBM).
Solution: The M-I SWACO ULTRADRIL with
POROSEAL system was introduced with the purpose of ensuring shale stability and
reducing the occurrence of over-guage hole to assist in cementing operations.
Results: The 8 1/2-in. interval was drilled
and 7-in. liner was successfully run to bottom without any drilling fluid
related issues. The ULTRADRIL system with POROSEAL additive was able to
ensure:
- Elimination of the need for backreaming certain intervals
- No NPT due to drilling fluids was observed
- No stuck pipe/No bit balling
- Reduction in previously observed drag readings