Abstract: By means of multifunction water flow time spectrum logging principles and its operating technique, and optimizing the match of activation time and spectrum period, the quality of logging data has been improved obviously.The application examples indicate that this technique can be used to inspect water fluxes accurately inside and out side the tubing and casing, locate tubing or casing leakage and channel posit ion in oil water well, and analyze injection profile quantitatively.Good geologic results have been achieved through application of this technique to Zhongyuan Oilfield.