| The profile control is widely used in oilfield with high water. According to the evaluation of profile control effects are also put forward many methods, such as:analysis of injection, injection of water well profile analysis, water absorption index analysis, oil well production condition analysis. These methods can be better on the effectiveness of profile control effect evaluation, but they can’t for deep profile control and plugging position displacement agent evaluation. Therefore, in this paper, the testing method of the effective plugging position and profile control agent. The research has important practical significance.This paper designs four kinds of well test interpretation model. Get the double logarithmic curves of well test interpretation model by using the Matlab programming software for the numerical inversion of a model, and analyzing the effect factors. Finally, the plugging position and effectiveness of the plugging was studied by using well testing method(1) The mathematics model of well testing interpretation has been established wit-h a non-Newtonian power-law fluid, non-Newtonian/Newtonian fluids, Newtonian/non-N ewtonian/Newtonian fluids and district property is a power function change of the thre e zone composite model accounting for wellbore storage, skin effect in wellbore. Get well test model corresponding to the double logarithmic curves by making use of the Laplace transform and its numerical inversion, and analyzing the effect factors.(2) The departure time, time interleaving method and curve fitting method to determine the flooding of plugging position;(3) Studying on the effectiveness of flooding through the analysis of the characteristics of well test curve changes and the changes of parameters.This paper studies the method of drawdown test on the plugging effect of flooding agent plugging position and flooding was evaluated using pressure, contribute to the site using the test data on the drive effect of dynamic evaluation. |
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