RE: history.26 Nov 2019 10:46
whilst canargo had issues at Manavi 12 back in 2008.. we should take note of the observation..in relation to our own well WR16 and how things can change.
The initial flow-back of frac fluids (spent acid and chemicals) contained encouraging shows of oil and gas, but following clean-up, the maximum oil cut observed was only 5-7%. It appeared that there was a significant water incursion into the wellbore with no indication as to the source of this excess water. It was noted that following the simple acid wash completed in April 2007, an oil cut of approximately 50% was observed.
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mind you, they made a right mess of it after that though.....
Before further testing could be done, it was necessary to replace the 5 inch frac string required for the stimulation operation with proper 2 7/8 inch production grade tubing as planned.
The original plan was to set a plug in the well using the Schlumberger coiled tubing unit which was onsite for the stimulation operation, however, a failure of the injector head led to the coil parting and dropping into the well. It took several days to retrieve the coil and it was only then realized that the plug had been damaged and lodged in the well. A wireline unit was mobilized from Baku to reset the plug. This was successfully completed, but on extraction of the frac string by CanArgo Georgia it became apparent that damage had also been caused to the completion which resulted in a modification to the final well completion being required. The production tubing is now in place and pressure tested and operations are progressing to retrieve the mechanical plug and continue with the well testing operation. In the meantime, Schlumberger has demobilised from the site.
As part of the testing program, a wireline-conveyed production logging tool will be run in the well to help locate fluid entry points to the well and provide downhole flow rate and pressure data during the test. This data will assist in the evaluation of well conditions and reservoir performance and help assess the overall potential of the well.
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