Optimization of integrated geological-engineering fracturing parameters for buried hill fractured reservoir in the H-2 well area

The buried hill fractured reservoir in the H-2 well area exhibits strong heterogeneity, poor physical properties, well-developed natural fractures, and high development difficulty. Conventional two-dimensional fracturing simulations are difficult to consider the influence of natural fractures. Therefore, an integrated geological-engineering research approach is adopted. Based on the three-dimensional fine modeling of geological parameters, natural fractures, and geomechanics, the optimal design of fracturing parameters is carried out by fully considering the coupling relationship between geological sweet spots and engineering, providing strong support for the economic and efficient development of the study area. Research has shown that a natural fracture approach angle of 45°, a displacement of 7～8 m³/min, a net fluid volume of 700～750 m³, an optimal sand ratio of 15%, and a prepad fluid ratio of 50%～55% can effectively increase the fracturing area and volume, and the maximum recoverable reserves per well and the maximum recoverable reserves of the block. This study has achieved an integrated research process from geological modeling to geomechanical modeling and then to fracturing simulation, which can provide theoretical and technical support for the subsequent fracturing transformation of the H-2 well area and similar buried hill fractured reservoirs.