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Drilling Activity for Saturday, August 29, 2009
Well: APS Cholla Pilot CO2 Well
Rig: Bearcat Rig 2
Activity: Drill Stem Testing
Drill stem testing (DST) tools were assembled and lowered into the wellbore. The dual packer isolation assembly was set, isolating the open-hole section from 3,498 to 3,636 ft. The downhole valve was opened, exposing the formation in that interval to ambient pressure for 30 minutes. No flow was observed, with only slight blow indicated. The tool was shut in for 1 hour to allow formation pressure to stabilize. The tool was re-opened for 15 minutes, with another minor blow indicated. The tool was unset and retrieved from the wellbore. The DST assembly was broken down at surface. The DST assembly was re-configured to straddle 148 ft of interval and lowered into the wellbore. At report time the crew was lowering the assembly into the wellbore on the workstring.
Observations  
  • Daily activities summarized to 6:00 a.m. August 30.
  • No fluid was recovered from DST of Martin formation.
 
Drilling Activity for Sunday, August 30, 2009
Well: APS Cholla Pilot CO2 Well
Rig: Bearcat Rig 2
Activity: Drill Stem Testing

The drill stem testing (DST) dual packer isolation assembly was set, isolating the open-hole section from 2,144 to 2,298 ft. The downhole valve was opened, exposing the formation in that interval to ambient pressure for 15 minutes. A good blow was indicated. The tool was shut in for 1 hour to allow formation pressure to stabilize. The tool was re-opened for 1 hour, with good blow indicated. The tool was shut in for 3 hours to allow formation pressure to stabilize. Initial attempts to unset the DST tool were unsuccessful, as the tool remained stuck against the borehole. The tension pulled on the tool string was increased gradually in successive attempts to engage the downhole jars. The jars were functioned and the tool was freed on the second jarring event. The tool string was retrieved from the wellbore. The DST assembly was broken down at surface and loaded out.

The bottomhole assembly and workstring were lowered into the wellbore to 2,732 ft and the wellbore was circulated until returns were clean. The workstring was retrieved from the wellbore and the bottomhole assembly was laid down. Drill pipe (open-ended) was lowered into the wellbore to 2,683 ft. A pre-job safety meeting was held and Schlumberger cementing equipment was rigged up. A balanced cement plug was placed in the interval from 2,683 to 2,505 ft. The workstring was pulled up to 2,505 ft and the well was circulated at that depth to ensure no cement remained in the borehole above that depth.

Observations
  • Daily activities summarized to 6:00 a.m. August 31.
  • Approximately 1,400 ft of fluid was recovered from the DST of Supai formation. Maximum chloride reading from recovered fluid was 145,000 mg/l.

Drilling Activity Archive


 

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art Click to view more ino on Moenkopi Formation art art
Click to view more info on Coconino Sandstone art
click to view info on Supai Formation art
click to view info about Naco Formation art
Click to view info about Martin Formation art
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click here to review an introduction to geologic formations click for more information about Moenkopi Formation click for more info about Moenkopi Formation click for more info on Supai Formation click for more info on Naco Formation click for more info about Martin Formation

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