Abstract

Productivity simulation of multiple-fractured horizontal wells is the core technique during optimizing fracture’s amount and parameters. According to the dissymmetric double wings of multiple fractured high productivity horizontal gas well which is equality discreted, applying the theory of point source, the formula of unsteady seepage of gas and the principle of superposition, this paper deduce the model of overall pressure drop in formation considering the mutual interference of multi fracture. Besides, considering the high velocity non-Darcy’s flow’s effect to the fracture productivity in high horizontal gas well, establishing a more sophisticated new model to stimulate the fracture productivity in horizontal gas well. Via stimulation calculating and comparative analysing the high velocity non-Darcy’s flow, the dissymmetry of the double wings fracture, the length of fracture and the conductivity’s effect on the multiple fracture gas well’s productivity. This offers a more accurate method to optimizing the fracture’s amount in landscape and the parameters of fracture in high productivity gas well and making sure the proper production’s differential pressure.

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