Removal of Near Wellbore (NWB) damage in a tight formation
Oman, Western Asia
An oil producing well in Oman completion with 3-1/2” production tubing above a 7” open hole section had lost production over time from a build up of filter cake and other NWB (Near WellBore) damage processes in a tight formation.
Intervention was required to restore well production without removing the existing completion string. Challenges included:
Halliburton proposed selective placement of a 15% HCl acid treatment with the HydraJet™ SPT (Self Positioning Tool) to remove the filter cake and enable the treatment to bypass NWB damage.
The HydraJet™ SPT is a thru-tubing tool that combines jetting technology with a self-decentralizing capability activated by internal pressure. Use of this tool enables:
The results were exceptionally good, with post intervention production levels returning at higher than the original production of the well.
Oil production of the well was higher than offset wells stimulated by conventional processes.