Analysis of Factors Influencing the Capacity of Fractured Straight Wells in Tight Gas Reservoirs

In response to the problems of non-production and low production from tight gas reservoirs, a study on the degree of influence of different parameters on the production capacity after fracturing of straight wells was carried out. Taking fractured wells in the Linxing block as the target, under the premise of relatively small and incomplete data, geological and engineering factors with gas wells in production were given priority, and the parameters affecting the production capacity of each well were calculated and analyzed by using the information quantity analysis method and gray correlation analysis method to determine the information quantity of each parameter and the correlation degree between each parameter. The analysis concluded that: permeability, shot hole thickness, water content saturation and porosity are the main factors affecting straight wells, and the secondary factors are seam length, formation pressure, and return discharge rate, respectively. Based on the high similarity of the analysis results of the above two methods, it is considered that the objective analysis method, gray correlation method, can compensate for the errors of the information quantity analysis method due to subjective factors. In the design of the Linxing gas reservoir development plan, the engineering factor among the main factors is used as the entry point, which can significantly improve the gas well capacity