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Drilling Activity for Monday, August 31, 2009
Well: APS Cholla Pilot CO2 Well
Rig: Bearcat Rig 2
Activity: Cementing and casing the well
The workstring was retrieved to the casing shoe and the hole was circulated while waiting on the open-hole cement plug to harden. After 6 hours of waiting on cement, the workstring was lowered into the wellbore to 2,530 ft, and the well was circulated from that depth. Cement was observed in the drilling mud, confirming that the cement plug was in place. The workstring was retrieved from the wellbore while laying it down. Casing rams (5-1/2") were installed in the blowout preventers and casing running equipment was rigged up. A total of 63 joints of 5-1/2" casing were installed, with the end of the casing placed at 2,504 ft. The casing was cemented using lead and tail cements, and the cement was displaced with fresh water to the float collar at 2,424 ft. Mud returns were present throughout the cement job. The 20-barrel (bbl) chemical wash spacer and 5 bbl of water (20 bbl total pumped) were circulated to surface (cement returns did not reach surface). Casing running and cementing equipment was rigged down and the casing slips were installed in the wellhead. The casing was cut above the slips and the blowout preventers were removed from the wellhead. Rigging down and cleaning of rig tanks began.
Observations  
  • Daily activities summarized to 6:00 a.m. August 31.
  • The casing was reciprocated throughout the cement job. Casing centralizers were installed on every other joint of casing.
  • Lead cement: 342 sacks of 75/25 TXI/G cement + additives, mixed at 11.7 lb/gal. Cement volume pumped was 35% excess over open-hole caliper.
  • Tail cement: 267 sacks of Lite-Crete + additives, mixed at 12.5 lb/gal. Cement volume pumped was 20% excess over open-hole caliper.
 
Drilling Activity for Tuesday, September 1, 2009
Well: APS Cholla Pilot CO2 Well
Rig: Bearcat Rig 2
Activity: Demobilization

The rig tanks were cleaned of mud and solids and ancillary equipment was rigged down. Pipe handling equipment was removed from the rig floor and the flowline was rigged down. The rig mast was lowered and placed into the cradle. The mast was disassembled from the rig unit and prepared for transport to Farmington, NM, along with the rest of the equipment. The substructure was loaded out and departed the site. At the end of the day approximately 60% of the equipment had been demobilized from the site. A final cut was made on the casing stub for installation of tubing head. Drilling mud and solids were hauled off for disposal.

Observations
  • Daily activities summarized to 8:00 p.m. September 1.

Drilling Activity Archive


 

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