METHOD FOR ESTABLISHING AND SOLVING NUMERICAL WELL-TESTING MODEL OF HORIZONTAL WELL FOR TIGHT GAS HYDRAULIC FRACTURING

摘要

A method for establishing and solving a numerical well testing model of a horizontal well for tight gas hydraulic fracturing. The method comprises the following steps: (1) generating two-dimensional and three-dimensional geological body models of a horizontal well for tight gas reservoir hydraulic fracturing; (2) performing grid discretization on the generated two-dimensional and three-dimensional geological body models of the horizontal well for tight gas reservoir hydraulic fracturing; (3) computing a percolation model of a horizontal wellbore having no pressure difference; (4) establishing a coupling model, solving the established coupling model, and generating a well testing theoretical curve from the acquired solution; and (5) fitting the theoretical curve acquired in the step (4) and a measured curve to acquire well testing interpretation parameters. The present invention has the advantages of fast computation, good curve fitting, and accurate interpretation results.