Streamline numerical well-testing interpretation model for multilayered reservoirs

A streamline numerical well-testing interpretation model for multilayered reservoirs is presented based on the streamline method and the numerical well-testing theory. The model consists mainly of two mathematical models, one for the production period and the other for the testing period. The former is actually a black oil model while the latter is a streamline model composed of all the mathematical equations established for each streamline traced from testing wells. All of the models can consider various influential factors (such as commingled production/injection, producing history, heterogeneity, multi-phase flow, multi-well interference, interlayer interference and so on) and be solved by the streamline method, which ensures the high calculation speed and reliable stability and thus setting a good basis for the auto-matching interpretation of numerical well-testing data. The validity of the model is proved by solving an ideal multi-layered reservoir and analyzing the model features.