Reasonable production allocation of gas wells in tight gas reservoirs of different channels of Shaximiao formation in eastern slope area

The reservoirs from different channels of Shaximiao formation in eastern slope area are characterized by big differences in reservoir physical property, and the porosity, permeability, water saturation and heterogeneity in vertical and horizontal directions are different. Therefore, gas wells should be classified for production allocation, while the conventional reasonable method of production allocation is not completely suitable for the requirements of production allocation, and the influence of starting pressure gradient, stress sensitivity, slippage effect and other factors should be considered comprehensively.Therefore, in view of the three types of typical river channels, starting from three aspects, namely the rational utilization of formation energy, extension of stable production of gas wells and enhancement of oil recovery ratio, by respectively using open flow potential method, indicator curve method and numerical simulation, a corresponding targeted production allocation pattern was established. The results show that the production allocation at the initial stage by using the methods mentioned above can satisfy the reasonable production of gas wells, and the numerical simulation method is more matched with the actual daily gas production.