Fast prediction method of tight gas production based on segmented decline

The physical properties of tight gas reservoirs are poor. During the stable production period wells, most recoverable reserves produced in declining stage. It is great significance to accurately study law gas. However, declines rapidly early stage and slower middle late stages, single model fitting prediction results have large errors. In view above problems, according change characteristics decline divided into three a segmented analysis method established. research show that wells exponential decline, relatively slow middle-term belongs depletion linear decline. Based on reservoir software was compiled, variation under certain requirements were studied.