<p>The development of hydraulic fracturing technology in offshore oil fields has lagged, constrained by operational conditions and environmental challenges. This study focuses on offshore low-permeability tight reservoirs, employing numerical simulations to investigate multi-cluster fracturing in horizontal wells under varying reservoir thickness and cluster spacings. The research explores the impact of different cluster spacings and reservoir thickness on stress shadow effects and fracture propagation behaviors. A detailed analysis was conducted to develop visual representations of how cluster spacing and reservoir thickness influence multi-cluster fracture extension. The study also optimizes perforation parameters to improve fracture initiation and propagation. Key findings indicate that in scenarios with small cluster spacing and thick reservoirs, significant stress shadow interference occurs, impeding the extension of middle fractures due to pressure from outer fractures. By reducing perforation friction in the middle fractures and increasing friction in the outer fractures, balanced fracture propagation can be achieved, enhancing the overall efficiency of multi-cluster fracturing operations.</p>