Influencing Factor Analysis on the Fractured Tight Sandstone Gas Reservoir Characteristics: A Case Study of Bozi 3 Gas Reservoir in the Tarim Basin

The Bozi 3 gas reservoir in the Tarim Basin is a typical ultra-deep fractured tight sandstone reservoir, which main formations are Cretaceous Bashijiqike Formation and Baxigai Formation. has characteristics of deep burial, matrix, well-developed fractures, large differences well productivity, regional pressure distribution. These bring development challenges deployment, production allocation, rate optimization, improvement. deposited braided river delta, fan shallow lake environment with adequate provenance strong hydrodynamic environment, provides favorable depositional conditions for formation thick sandbodies. Although buried depth over 6,000 m, it undergone an evolutionary process long-term burial early stage rapid late stage, protects primary pore, finally formed extra-low pore ultra-low permeability structure. Late tectonic movements caused to experience uplift under nappe-thrust forming number high-angle fractures around faults. fracture distribution inhomogeneous, tensile at top anticline have low-filling degree good effectiveness, effectively improve properties. Through analysis influencing factors concluded that difference reason adjacent wells zonal development. This study can also provide reliable geological basis allocation rationalization, optimization area.