Fracturing Evaluation of Horizontal Wells in Low Permeability Sandstone Gas Reservoir——By Taking A Block in Sulige Gas Field for Example

Dense layer of low permeability reservoir has strong heterogeneity,obvious anisotropy and low reservoirs permeability with very low natural gas production.In order to develop such gas reservoirs better,artificial fracturing should be implemented in the reservoirs.Therefore,evaluation of the fracturing effect starts to get much more attention,the accuracy of the evaluation results is theimportant guarantee for optimization of fracture parameters and capacity forecasts after fracturing,and reducing fracturing costs and increasing oil and gas recovery.The study takes the cumulative oil production rate after fracturing as standard,uses Software FracproPT to simulate horizontal length of horizontal wells,the effect of number of fracturing segments and the changes in crack spacing to judge the merits of fracturing effect.Meanwhile by using Eclipse reservoir simulation software,the paper discusses the results on volume fracturing technology and conventional staged fracturing technology to provide technical support for the future fracturing development of tight gas reservoirs with low permeability.