An improved radioactive tracer response analysis and injection profile quantification method based on intelligent algorithms

An improved radioactive tracer response analysis and interpretation method is proposed. The characteristics of the tracer peaks under different measurement conditions are studied using numerical simulation. An optimization method is designed to solve the tracer’s transit time passing a certain distance based on ant colony optimization and Nelder–Mead algorithm. The interpretation model is established to calculate the flow velocities using the time-depth relationship. The application example showed that the proposed method could clearly analyze the downhole flow situations and quantify the injection profile.