应用因子分析方法识别热液蚀变作用类型

Identification of Hydrothermal Alteration Type by Using Factor Analysis Method

结合薄片鉴定资料和测井响应特征分析表明,位于准噶尔盆地乌尔禾地区夏子街组的部分井区发育热液成因的蚀变地层。根据常规测井资料与薄片鉴定资料的对比分析,以蚀变作用导致的测井响应变化规律为依据,建立了以因子分析技术为手段的热液蚀变作用识别方法,该方法能够有效识别不同热液蚀变作用类型,其中岩性界面处与高自然伽马对应性较好,蚀变砂砾岩的底部为铀质富集的主要部位,为进一步研究热液蚀变作用的分布模式奠定了基础。

The analysis of thin section identification and log response characteristics show that there is developed hydrothermal alteration zone formation in some Xiazijie wells of the Wuerhe area, Junggar basin. With the comparative analysis between the conventional log data and thin section analysis data, and the law of the log response change resulting from alteration, we build the hydrothermal alteration recognition method by factor analysis technology which can effectively identify the different types of hydrothermal alteration. The hydrothermal alteration better matches with high natural gamma at lithologic interface, the bottom of the alteration glutenite is the main part of enriched uranium. This method provides a foundation for further studying the altered model of hydrothermal alteration.