Ensure diverter dissolution at low temperatures
OpenPath Sequence diversion stimulation service integrates modeling, near-wellbore diversion, and a fluid system to suit reservoir conditions, type of completion, and treatment requirements. The diversion system uses composite pills engineered to address specific challenges—including ultralow bottomhole temperatures that prevent complete dissolution of conventional diverters.
Stimulate a 200% improvement in injectivity
Delivered from the Island Centurion stimulation vessel, the stimulation treatment comprised 1,800 bbl of low-pH crosslinked gel and 1,300 bbl of 28% HCl pumped over five cycles with four pills of the ultralow-temperature diverter. Each diverter pill generated sustained bottomhole pressure increase and diversion pressure spikes of 300 to 700 psi.
Before stimulation, the first target well’s water injection rate was 5,000 bbl/d. After stimulation, the well was brought online with an initial water injection rate of 15,000 bbl/d, which stabilized at 11,500 bbl/d. The treatment was calculated to have improved relative stimulation efficiency† by more than 200% as compared with six earlier treatments using rock salt. The efficiency of the ultralow-temperature diverter indicated that its more complete diversion enabled the acid stimulation fluid to reach more of the perforated interval. No specialized equipment was required, and the well was returned to injection rapidly after treatment.
Additional details of the case are presented in OTC paper 31246.
† Relative stimulation efficiency is a measure of the volume of acid pumped per foot of perforated interval per barrel of injection or production improvement.