Research on Characterization Techniques for the Core-Band Architecture of the FI17 Strike-Slip Fault Zone in Fuman Oilfield

The Fuman Oilfield, China's largest ultra-deep oilfield, hosts a typical carbonate fault-controlled reservoir system. Over the past two years, it has entered a phase of large-scale development characterized by increasingly dense well patterns and growing complexity in interwell connectivity. Concurrently, advancements in the study of strike-slip fault-controlled reservoir units have refined the understanding of fault fracture zones. The previous tripartite structural model (comprising caves, vugs, and fractures) has evolved into a multi-tiered core-band architecture exhibiting fence-like characteristics. This enhanced conceptual framework has escalated precision requirements for geophysical interpretation technologies, as conventional approaches now prove inadequate for refined development objectives. To address these challenges, this study focuses on the FI17 fault zone within the Fuman Oilfield. By integrating geophysical technologies including multi-attribute fracture zone delineation, AI-driven fault recognition, and facies-controlled geostatistical inversion, we have developed a specialized seismic characterization methodology for the core-band architecture of carbonate strike-slip fault systems. Demonstrating strong alignment with dynamic well data, this approach establishes a robust foundation for optimizing interwell connectivity analysis and development well-cluster configurations in the Fuman Oilfield.