2013-11-04_HYDROLOGY - M1983194 (2)

Home Browse Search

ft3 /sack and nitrogen injected down to 10 Ibs /gal, tail cement: 100 sacks of VariCem cement mixed at 12 ppg with 14.3 gallons per sack water, yielding 2.42 ft3 /sack; all displaced with 91 barrels of water. The total cement volume was a 100% excess of calculated annular volume. No fluid or cement returns were seen at surface and recorded pressures did not indicate a good cement job. The plug was bumped with 570 psi, then dropped to 361 psi and held for 5 minutes. NSI was advised by Halliburton to wait for a 24 hour period prior to running a bond log to determine the top of cement in the annulus. Halliburton Wireline was contacted to run a cement bond log (CBL). The crew rigged up and ran in the hole at 23:00 hours on July 17, 2013. The log indicated a good cement bond from 1,900 feet MD KB (bottom of log) to 1,640 feet MD KB, then poor cement from 1,640 feet MD KB to 1,450 feet MD KB, and no cement from 1,450 feet MD KB to surface. After 13 hours were expended to interpret logs and determine a plan of action, a cast iron bridge plug (CIBP) was run in the hole and set at 1,450 feet MD KB (in the A- Groove stratigraphic zone). The 7.625 -inch casing was perforated with two 0.40 -inch holes at 1,445 feet and two 0.40 -inch holes at 1,444 feet, for a total of four holes with 90 degree phasing. The hole was circulated through the perforations while the cementers rigged up and waited for the cement to arrive on location. Halliburton mixed and pumped the following cement sequence: 20 barrels water, lead cement consisting of 175 sacks EconoCem V4 mixed at 11 ppg with 17.48 gallons per sack water, yielding 2.95 ft3 /sack, tail cement consisting of 65 sacks HalCem V2 mixed at 14.8 ppg with 6.62 gallons per sack water, yielding 1.37 ft3 /sack, and displaced with 66.5 barrels of water. Good returns to surface were noted while pumping down and 31 barrels of cement were returned to surface at the end of the job. The cement was in place at 02:00 hours on July19, 2013. While waiting on cement, Capstar performed the following: nippled down the BOP, cut the casing, topped off the annulus with 2.5 cubic yards of Redi Mix delivered by Meeker Sand & Gravel, nippled up the new BOP, picked up the new 6.75 -inch BHA and tagged the top of cement at 1,401 feet MD KB. The float collar and cement were drilled out to 1,933 feet MD KB and the casing was filled with water for CBL logging operations. Daub & Associates, Inc. Page 10 of 13 10H -1V Well Summary Report