To effectively exploit a by-passed underpressured Devonian (D3) pinnacle reef, a horizontal re-entry was planned. Due to the presence of a gas cap and a nearby solvent bank in the reef it was essential that hydraulic isolation be achieved when cementing the build section liner in order to prevent gas migration during oil production from the new wellbore.

Coiled tubing was utilized to clean the formation face prior to cementing; foam-cement was then used to isolate the near wellbore and coiled tubing was once again used to clean out any excess cement from blocking the borehole prior to drilling ahead and cementing the liner.

Keywords:
upstream oil & gas, wellbore, society of petroleum engineers, drill pipe, zonal isolation, completion installation and operations, spe 54473, filter cake, permeability, liner
Subjects:
Drilling Operations, Pressure Management, Drilling Fluids and Materials, Casing and Cementing, Reservoir Characterization, Well control, Drilling fluid management & disposal, Cement formulation (chemistry, properties), Completion Installation and Operations, Well Integrity
Copyright 1999, Society of Petroleum Engineers
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