Study on Optimal Volumetric Fracturing Design of Horizontal Tight Oil Wells in $$ {\mathbf{E}}_{3}^{2} $$ Pre-salt Reservoir in Yingxi Area, Qaidam Basin

\( {\text{E}}_{3}^{2} \) pre-salt reservoir in Yingxi area, Qaidam basin, Qinghai Province, China has been a key research object in the exploration and development of Qinghai Oilfield in recent years. This reservoir is characterized by deep burial, low porosity, low permeability, complex lithology, natural fracture development and high content of carbonate rock. Conventional ideas and technologies of reservoir reconstruction cannot effectively release the oil and gas production potential of this reservoir. Therefore, based on the development of tight oil mainstream means, multi-stage horizontal well fracturing technology as the foundation, from the perspective of reservoir engineering optimization of artificial fracture geometry parameters, combined with rock mechanics analysis and log interpretation results to optimize the specific pattern of artificial fracture spatial distribution in the well section, thus further optimizing the size of the design and construction and parameters, optimizing the construction materials, eventually to microseismic monitoring data and production after fracturing feedback correction for the entire design process. Through the optimization of fracturing ideas and design methods for this reservoir and the guidance of field fracturing construction, a feasible way is explored for large-scale exploitation of tight oil resources in Yingxi region.