The CoilFRAC service combines CT and selective fracturing technology enabling multiple zones to be treated in a single trip. In new wells, each zone is perforated conventionally in one wellsite visit. CT is then run in hole with a straddle tool BHA. The bottom zone is straddled, and the fracture stimulation is pumped through the CT string. Residual proppant is reverse-circulated out of the wellbore, and the straddle tool is moved to the next zone, where the process is repeated. Each layer is individually stimulated using only one run into the wellbore.


Well treatment programs may use CT to convey stimulation fluids that boost production by restoring or improving reservoir permeability. In a matrix treatment, fluids are pumped into a reservoir at a pressure that is greater than reservoir pressure but less than the formation fracture threshold. This technique pushes the fluids through the formation pore spaces without initiating fractures. A similar operation, fracture acidizing, pumps fluids at a pressure that intentionally initiates fractures.