Optimum selecting technology for sand control method and economic assessment model

Every sand control method has its adaptability for each element. The adaptabilities of sand control methods are analyzed. The knowledge database containing the adaptability conditions of most methods is constructed. Based on fuzzy mathematics, each method can be divided into a few fuzzy sets. And with the supporting of the database, the adaptability of every method can be calculated by subordinate function. This fuzzy assessment model can be applied to calculate the technical index of all the sand control methods and select a certain method reasonable in terms of technology. The economic evaluation models for different life span are used to evaluate the above selected methods. In this way, an optimum sand control method for a well can be determined.