气测录井判别地层流体性质的两种方法

Two Methods to Identify the Formation Fluid Property by Using Gas Logging Data

为了提高气测录井解释正确率,提出了Fisher和马氏距离两种判别方法。利用这两种判别方法可以有效地判别地层性质,克服了以往判别方法不能充分全面的利用录井资料、未能综合分析宝贵的录井信息、解释符合率偏低的缺点。实际应用结果表明,Fisher判别法和马氏距离判别法的解释符合率平均达到77%。

In order to improve interpretation coincidence rate of gas logging, two discriminate analysis methods such as Fisher and Mahalanobis-distance discriminate analysis methods were proposed. The methods could be used to identify the formation property effectively for the purpose of avoiding the shortcomings of insufficient and incomplete use of log data and non-integral analysis of log information with low coincidence rate.The result shows that the interpretation coincidence rate of Fisher and Mahalanobis-distance discriminate analysis methods can reach 77% equally.