Analysis of factors affecting productivity of volume fracturing horizontal wells in tight sandstone reservoirs
It is difficult to exploit tight reservoir because of its complex pore structure and poor permeability.Therefore,it is necessary to adopt fracturing technology to transform the reservoir to form a complex fracture network and improve the percolation capacity of the flu-id in order to improve the productivity.Therefore,in order to further understand the fluid percolation mechanism of fractured tight reservoir and better evaluate productivity,the tight reservoir percolation model of volume fractured horizontal well is established by using CMG reservoir numerical simulation software,considering limited conductivity conditions and based on dual medium reservoir.Through the study of different fracture parameters,the ef-fect of each parameter on single well productivity is analyzed.The effects of parameters such as microfracture permeability,fracture half-length,fracture conductivity,fracture spacing,matrix-fracture cross-flow coefficient and fracture height on cumulative oil production and pressure distribution near borehole are studied.The results show that microfracture perme-ability has the greatest contribution to cumulative oil production,followed by fracture half-length,which are important factors to increase single well production during fracturing hori-zontal well production.Fracture spacing and fracture conductivity also have a great influence on productivity,but in actual mining,it is necessary to reasonably match the relationship be-tween the number of fractures and the length of horizontal wells and the half-length of frac-tures,so as to achieve the purpose of effective mining.The matrix-fracture cross-flow coeffi-cient and fracture height have limited influence on productivity.
万方数据
维普
