测井曲线自动分层技术及在杏北地区小层划分中的应用

Technique of Auto-zonation with log and Its Application to Reservior Zonation at Xingbei Area

程玉群,李秀荣,刘铁桩　

Cheng Yuqun, Li Xiurong, Liu Tiezhuang

中原石油勘探局勘探开发科学研究院,中原石油勘探局技术有限公司

Research Institute of Petroleum Exploration and Development ,Zhongyuan Petroleum Exploration Bureau ,Henan 457001 , P. R. China

首先阐述了利用测井曲线进行小层划分的原理和方法,采用层内差异法和聚类分析法相结合进行分层,该方法是目前利用测井曲线进行小层划分和对比,并最终实现定量化、自动化的一条较为有效的途径。通过大量地质研究认为卡准所分地层的顶、底界是自动分层的基础,而对分层参数( B 值和d_min 值) 的选取以及一些分层处理技巧都必须密切结合本地区的储层分布特征,从而取得较为理想的效果。结合杏北地区河流相储层的具体实际,对区内葡Ⅰ1～3 主力油层进行划分和对比。通过对比52 口井的自动分层与人工分层结果,发现二者具有较高的符合程度,大大提高了小层划分的效率。

The paper presents the theory and method of substratum zonation with log. The zonation is connected with the intraformation discrepance method and the clustering analysis method. With logging trace , the technique is more effective method to substratum zonation correlation at present ,getting to quantification and automation at last . By much investigation ,we think that the base of autozonation is to know accurately the reservoir’s interfacial and bottom boundary. To obtain ideal results , the selection and some treatment techniques of zonation parameters ( B value and dmin value) must be tightly combined with reservoir distribution characteristic. Considering the real case of the fluvial faces in Xingbei area ,we zonated and correlated the main oil beds of Pu I 1～3. After the synthetic zonation and auto-zonation of 52 wells were compared. High coincidence rate was obtained , improving work efficiency of substratum zonation.