An international Operator drilling in the Permian Basin wanted to deepen a 30-year-old well by 1,200 feet. The well was initially perforated and subsequently produced. After 30 years on production, the well could not support a full column of fluid. In order to safely drill the additional 1,200 feet, the Operator first wanted to regain circulation in the wellbore. In an effort to regain circulation, the Operator attempted to squeeze cement three times into the existing perforated zone with no success.
Impact engineered a MaxVert™ diverter package to plug the existing 33 perforations to regain circulation. MaxVert fluid diverter is a temporary diverting material used in fracturing, refracturing and sub-hydrostatic workovers. In this operation, MaxVert was used to temporarily plug existing perforations, allowing the Operator to reach a new, untapped section of their reservoir.
An Impact Field Service Technician prepared a 75 bbl pill from a brine fluid. The Hydril was closed and the pill was bull-headed into the drill pipe and down the casing. The first indicator that the pill reached the target zone of perforations was the pressure climbed to 600 psi on the manifold. After the pressure reached 800 psi, the pumps were shut down to determine if the system could hold pressure. After 30 minutes, the pressure dropped from 800 psi to 250 psi. An additional 4 bbl of MaxVert diverter pill was pumped downhole. After the pressure reached 960 psi, another static test was performed to determine if the wellbore would be able to hold the pressure for an additional 15 minutes. During that time, the system did not lose any pressure and the attempt to regain recirculation was deemed a success.
The Operator achieved the following targeted KPIs for the MaxVert diverter system:
The Operator continues to use MaxVert diverter to rejuvenate underperforming and poor producing wells in West Texas.