Application of pattern recognition in stratigraphic division

Chen Qinghua; Zhang Fengqi; Sun Shupeng; Liu Chiyang

doi:10.11743/ogg20040119

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Application of pattern recognition in stratigraphic division
Vol. 25, Issue 1, Pages: 102-105(2004)
Online First：25 February 2004，

Published：2004
DOI： 10.11743/ogg20040119
稿件说明：

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DOI：

Chen Qinghua, Zhang Fengqi, Sun Shupeng, et al. Application of pattern recognition in stratigraphic division[J]. 2004, 25(1): 102-105. DOI： 10.11743/ogg20040119.

摘要

模式识别就是研究已知的模式

并对模式进行分类

利用计算机技术

将待识别模式进行归类

达到分类的目的。模式识别的过程可概括为:首先

应用傅立叶频谱分析、回归分析及多点平滑法进行数据预处理;其次

采用旋回地层学理论

计算已知钻井地质数据的频谱图

利用米兰柯维奇旋回组分进行学习

提取特征

建立模式分类;最后

用已建立的模式类对其他钻井进行地层划分。运用模式识别方法

对大港油田40多口钻井进行了地层划分

划分结果与原地质分层结果具有很好的相关性

而且精度更高。

Abstract

Pattern recognition is to subsume undetermined patterns with computer technologies based on study and classification of the known patterns.Pattern recognition can be performed in three steps.First

preprocess data through Fourier analysis

regression analysis and multi-point smoothing;then calculate frequency spectrum of the known wells' geological data by using cyclical strategraphy and perform feature study and extraction and pattern classification with Milankovitch cyclic components;and finally classify strata in other wells by using the established patterns.Strategraphic division has been performed in 40 wells in Dagang oilfield with the pattern recognition method and the results are in good agreement with the original ones and have better accuracy.