关键词: 水淹层, 测井评价, 地质条件, 约束, 动静态相结合, 定性识别, 定量评价

Abstract: This article presents an evaluation method on waterflooded interval well logging by means of conventional log data.Firstly,the method is applied to divide the levels of waterflooded intervals under the circumstances of geologic condition restraints,combination of performance and static behavior,core scales,and diversified courses.Secondly,the levels of waterflooded interval analysis are undertaken qualitatively and quantitatively,leading to quantitative appraisal eventually on the basis of evaluation models of waterflooded intervals constrained by geological conditions.This method has proved itself to be successful in enhancing the accuracy of waterflooded interval well logging by a big margin.The conventional logging data of waterflooded reservoirs in high-porosity and high-permeability complex of Ng3+4 have been processed and evaluated at 510 wells in Gudao Oilfield. Upon being tested to 8 new wells,the method proves to be able to raise the accuracy to over 250% higher than that of other evaluation methods.The results will be able to meet the on-site demands.

Key words: waterflooded intervals, well log evaluation, geologic conditions, restraints, combination of performance and static behavior, qualitative discrimination, quantitative appraisal