Characterization and Optimization Methods for Energy Consumption in Low-Permeability Reservoir Fracturing Reconstruction

For the development of low-permeability unconventional reservoirs, hydraulic fracturing techniques are indispensable. However, these techniques require significant energy consumption. Against the backdrop of the current “dual carbon” goals, it is imperative to analyze and optimize hydraulic fracturing techniques from an energy consumption perspective. In this paper, we analyze the characteristics of reservoir flow, propose a method to characterize the energy consumption effectiveness of hydraulic fracturing, and establish a set of methods using numerical simulation techniques to design hydraulic fracturing construction schemes from an energy consumption perspective. Using Well Y-1 in Yongyi Block, Yong’an Oilfield, as an example, a three-dimensional geological rock physics model was constructed with the geological engineering integrated software Petrel, based on the actual geological conditions of the target area. This model simulated the fracture morphology and oil production under different construction parameters. Utilizing a large amount of numerical simulation data, a multivariate nonlinear regression method was employed to construct an energy consumption prediction model under different construction parameter influences. By using the energy consumption prediction model and orthogonal experimental design method, the optimal construction combination scheme with the lowest energy consumption for hydraulic fracturing reconstruction was selected. The results show that when the displacement is 5.5 m3/min, injection volume is 500 m3, sand injection volume is 55 m3, perforation density is 16 m3, and perforation diameter is 8mm, the energy consumption can be minimized while ensuring minimal variation in production compared to the original construction scheme, resulting in a 9.42% reduction in energy consumption.