|
|
| |
3-Slurry Annular Re-cementing Job Brought Cement to Surface and Helped Operator Stop Salt Water IntrusionLocation: Southeast NWAOperator's ChallengeIn January 2003, the customer drilled a well with 9-5/8" surface casing set at 1,700 ft and 7" production casing set to total depth. Cement on the 7" casing was brought to 5,000 ft. In the 18 months following this, two salt water disposal wells injecting into the Woodbine at approximately 5,000 ft were put on line in fairly close proximity to this producing well. As a result, salt water was eating holes in the 7" casing and causing production to drop off. The customer wanted Halliburton to attempt to re-cement the well to surface. Halliburton's SolutionConsidering the probability of losing circulation and bridging off due to the small annular area, Halliburton devised a 3-slurry cement job. The lead slurry was mixed at 12.2 ppg, the middle slurry at 14.6 ppg, and the tail slurry at 16.4 ppg. Cement was brought from 5,000 ft to surface. No lost circulation material was run in the slurries due to the high probability of bridging. High levels of low water loss additive were run. Economic Value CreatedHalliburton was able to successfully re-cement this 5,000-ft interval. As a result, a major workover job was avoided and production was regained. The estimated economic value to the customer was $401,000. |
|
www.Halliburton.com |
|
|||
