Case History: Subsurface Re-Entry
Kansas
Before
a depleted reservoir could be converted to gas storage, a gas
transmission company needed to re-abandon or complete an old “dry
hole” near the center of the reservoir. 8 5/8” casing had been
pulled to 435 feet and open hole existed from 1000 feet to the top of
the storage sand at 3100 feet. Two previous attempts to re-enter the top
of the casing stub at 435 feet had failed and a sidetrack had been
drilled to 1000 feet.
Vector Magnetics’ Wellspot service was used to guide directional drilling and milling a re-entry window into the 8 5/8” casing at 830 feet. 4 1/2” casing was run through the window in the casing to 3150 feet and cemented in place.