Due to the complex pore structure, low permeability, and high flow resistance, the development of low-permeability reservoirs is severely constrained by the limited efficiency of conventional waterflooding, leading to the persistent challenge of “poor injectivity and low productivity.” To promote energy-efficient, low-emission, and environmentally sustainable reservoir development, this study proposes a clean pressure-driven water injection (PDWI) technology inspired by the principles of hydraulic fracturing. A high-resolution geological model was constructed, and numerical simulations were conducted to systematically evaluate the impact of PDWI on both oil recovery and green development indicators, including energy consumption and carbon emissions. Key injection–production parameters—such as well spacing, injection rate, shut-in duration, and total injection volume—were optimized to enhance water injection efficiency and reservoir energy replenishment. Simulation results demonstrate that, under optimized conditions—an injection rate of 2500 m3/d, cumulative injection volume of 25,000 m3, a 10 day shut-in period, initial injection pressure of 40 MPa, and a 270 day injection cycle—the cumulative oil production over 15 years could reach 14,500 tons, corresponding to a recovery factor of 12.47%. Moreover, both energy consumption and carbon emission intensity per ton of oil were significantly reduced, achieving the dual goals of enhanced oil recovery and cleaner production. This study elucidates the mechanisms and optimization strategies of energy-efficient and low-carbon pressure-driven water injection, providing a theoretical basis and technical pathway for the green and efficient development of low-permeability reservoirs.