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The CalVisc frac fluid system was introduced in the Williston Basin in 2014 as an alternative to traditional crosslinked fluid systems. CalVisc provides many completion advantages including fracture complexity, minimal to no loss in fracture conductivity, improved clean-up and fewer chemicals pumped.
Due to high formation pressure experienced while drilling the lateral section of a Utica well, the customer’s drilling operations required a drilling fluid density increase to 18.5 pounds per gallon (ppg). Calfrac’s experienced personnel were called upon to customize the cement blend, manage the logistics of obtaining materials required to increase density, ensure mud/ spacer/cement compatibility, and safely complete the operation while working in extreme winter conditions.
Calfrac has done extensive research and incorporated theoretical and empirical results to extend pumping rates with annular fracturing to 7m3/min in 4.5” casing and to 10m3/min in 5.5” casing.
Calfrac has specifically designed surface equipment and operating procedures to complete a +6,000m annular fracturing operation beyond the previously defined 10,000 psi pressure limitation.
Formations in the Western Canadian Sedimentary Basin are continuously being completed in the pursuit of optimizing sand placement during hydraulic fracturing operations. Typical fracturing techniques in the Montney and Cardium area have included placing proppant into clusters between zones, which does not homogeneously distribute stimulation fluid between the multiple perforation intervals.