This Video of the Month was recorded with an Optis HD E-Line camera, run for an operator in South East Asia, to provide critical diagnosis required for workover planning.
The inspected well, previously a geothermal producer, was being injected with fresh water and blockages had been registered during operations preceding the camera run. A casing rupture was high in the list of suspected problems.
On the first frame, the downview camera is stationary inside the 13 3/8" production casing. The clarity of the video is remarkable, even for a larger diameter completion. There is significant scale build up, and debris can also be seen flowing into the well at this point.
On the next frame, the camera is switched to sideview mode and rotates to inspect the production casing wall in more detail. Scale on the low side has been scraped off by previous equipment deployments.
The downview camera then advances to the top of the 9 5/8" liner, where scale build up, corrosion and impact damage can be clearly identified. As the camera is pulled up for a better view, the frame suddenly rotates as the wireline torque is released.
At 1,703 m. debris flow has reached land-slide volume and scale deposits are heavy.
The tool finally comes to a full stop at more than 200 m. above the anticipated hold up depth, where the debris piled up causing a total blockage.
As a direct result of Optis HD E-line video diagnosis, a scale clean-up operation was included in the workover programme. Fortunately for the operator, a casing rupture was never the problem!