Well Test Analysis of Inclined Wells in the Low-Permeability Composite Gas Reservoir Considering the Non-Darcy Flow

The application of traditional well test interpretation methods cannot comprehensively consider characteristics stress sensitivity and non-Darcy flow for low-permeability composite gas reservoirs, which makes it difficult to obtain real reservoir parameters. Based on the micro-mechanism analysis in motion equation was improved. Thus, a mathematical model established belongs inclined with conventional internal zone external zone. Applying finite element method solve through Matlab programming, equivalent pressure point selected research distribution well. On this basis, bottom hole dynamic curve drawn, process divided into seven stages, parameter carried out. Finally, advanced nature new applied is compared by methods. can cause gradual upward warping later stage, non-linear enhancement leads an increase upturn simulation test. When inclination angle greater than 60°, early vertical radial mid-term linear gradually appear. A decrease shorter duration pseudo radius conduction coefficients ratio zones affects derivative slope transition phase zones. comprehensive consideration improve fitting degree curves. Not only that, but also strong diversification Results have guiding significance development evaluation wells.