Multiple Fracturing Horizontal Well Productivity Prediction

Horizontal well fracturing technology has become one of the important measures to improve the horizontal well productivity, oil and gas reservoirs recovery. Currently fractured horizontal well productivity calculation is not mature, and its productivity studied based on assumed fracture uniformly distributed,the actual production, mostly fractures non-uniform distributed. Therefore the study of fractured fracturing horizontal well productivity has important theoretical and practical significance.In this paper, the mechanism of formation fractures and the transverse fractures to be studied were focused on analysis and research. The derivation principle, considerations and derivation of previous productivity models were analyzed and summarized, then based on fractured horizontal well productivity theory, established a productivity model of horizontal well in any combination of the three transverse fractures, and by using Visual Basic6.0 code productivity calculation software. A comprehensive analysis of the effect of fracture parameters on horizontal well productivity, the analysis shows that the yield of fractured horizontal wells increased with the number of fractures, fracture length and fracture conductivity increases, but the rate of increase gradually decreases; For different layout scheme of fractures the productivity is different, fractures on both ends of horizontal wellbore long and short on the middle of horizontal wellbore in favor of drilling horizontal wells; When the fracture plane and the horizontal angle wells increases, the production of fractured horizontal wells also will increased, because the vertical distance between each fractures become larger so that the mutual interference between each fractures decreases.