Abstract
The application of skin factor can evaluate the change of formation seepage capacity, and the positive and negative value of skin factor can effectively judge the pollution situation of formation skin area. Combined with well test data, this paper analyzes and applies skin factor change of central well after tertiary oil recovery enters low water cut stage. The skin factor is used to classify well test curves, qualitatively analyze well test curves, evaluate single well productivity, and put forward relevant opinions and measures. Furthermore, the change of formation permeability can be judged by the change range of skin factor, and the productivity of fracturing measures can be quantitatively evaluated by referring to the relevant technical limits of fracturing measures. It achieves the degree of using skin factor to evaluate productivity, and achieves good effect of increasing oil and reducing water after being applied to single well evaluation.
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