Abstract
Abstract The application of foam-based hydraulic fracturing fluids in low-pressure, mature reservoirs has gained attention globally as a means to minimize formation damage and optimize proppant placement. In 2024, a pioneering fluid frac operation using a nitrogen foam system was conducted in the CIS region for the first time. The operation was executed on two offset wells with similar geological and petrophysical properties. One well was stimulated using a conventional linear gel system, while the other utilized a nitrogen-foam-based fracturing fluid. Both treatments were accompanied by comprehensive microseismic monitoring and tracer diagnostics. Microseismic analysis revealed that the foam-based treatment led to more controlled fracture height growth and longer effective fracture half-lengths, indicating a more targeted stimulation of the pay zone. Production data further demonstrated superior post-frac performance from the foam-treated well, with a 1.8x increase in initial oil rate compared to the conventionally treated offset. This paper presents an in-depth engineering evaluation of the treatments, supported by field data, simulation results, and diagnostic interpretations. The results confirm the potential of nitrogen foam fracturing for enhancing recovery in depleted, water-prone formations and set the stage for broader deployment of this technology across mature oil fields in the region.