Fracturing Optimization Technology Study On Wuqi Oilfield Chang4+5and Chang6Reservoir

Wuqi oilfield Triassic reservoir with a long2, Chang4+5, Chang6, Chang8,9and Chang10other mining strata, all with low porosity and low permeability, low pressure, low yield and other characteristics, generally without fracturing no natural capacity, fracturing, the well production is low, production fell fast, stable oil situation is grim, oilfield development well and poor adaptability fracturing, reservoir evaluation and on-site construction quality to be further improved and strengthened, constraints effective development of the Triassic reservoir, the main reservoir for the Triassic Chang4+5and Chang6as the main object of study, combined with Qi oil exploration and development in the process of fracturing practices to research-based reservoir, through the optimization of fracturing technology, formed a set Qi Triassic reservoir characteristics, strong operational optimization of supporting technologies fracturing mode. The process technology for low permeability Triassic reservoir; Triassic reservoirs with low permeability established the position of perforation, perforation parameters, fracturing fluids, fracturing, fracturing displacement, fracture size, pressure cracking and fracturing techniques such as blowout supporting integrated process optimization in fracturing technology; in the Triassic reservoir fracturing parameters proposed " hurt small, high-sand ratio, variable displacement " construction technology. Field application of more than300wells, the effective rate of85%, the cumulative production of crude oil2.13×104t.