Salt: Frisia BAS-1 Partial abandonment

Cavern pressures were too high to safely snub out the leaching strings. Therefore, in preparation for the final abandonment, the cavern (pressure) had to be isolated from the well. To do so, cement plugs were placed within the 10 ¾” and additionally in the 10 ¾” x 13 ⅜” annulus. This annulus was in communication with carnallitic brine; therefore, throughout the operations pressure control was essential to prevent any influx of carnallitic brine which would impact cement quality.

The operations were executed with coiled tubing. With the help of an inflatable bridge plug, wireline conveyed perforation guns, CBL logging tools and good cement recipes, the plugs were successfully set and inflow tested.