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靖边气田上古生界盒8段储层受复杂气水关系和储层非均质性的综合影响,利用单一指标进行气水层划分和产能评价时效果较差,为此提出了多级多元判别方法。首先将砂岩层划分为气层、气水层、水层和干层;其次,在气层中判别出工业气层和非工业气层;最后,在工业气层中判别出高产工业气层和基本工业气层。三级多元判别每一级的回判率都高于一级多元判别的回判率,其判别结果更加可靠。三级多元判别法在靖边气田取得了较好的判别效果,其判别结果与动态分析结果比较一致。
In the upper Paleozoic, the 8th reservoir of Jingbian Gas Field is affected by complicated gas-water relationship and reservoir heterogeneity. The single index is not suitable for the division of gas-water layer and productivity. Therefore, multi-level multivariate Discriminant method. First of all, the sandstone is divided into gas layer, gas-water layer, water layer and dry layer. Secondly, the industrial gas layer and non-industrial gas layer are discriminated in the gas layer. Finally, the high-productivity industrial gas layer and Basic industrial atmosphere. The three-level multivariate discriminant rate at each level is higher than the one-level multivariate discriminant rate, and the discriminant result is more reliable. The three-level multivariate discriminant method has achieved a good discriminant effect in Jingbian gas field, and the discriminant results are in good agreement with the results of dynamic analysis.