摘要
针对松辽盆地中央隆起带钻遇基底岩性复杂、取心较少的情况,以隆探1井为例,在取心井显示松辽中央隆起带基底主要为变质岩和岩浆岩的基础上,结合测井资料,运用Fisher判别分析的方法识别基底岩性。结果表明:松辽盆地中央隆起带钻遇基底岩性可化分为绿泥片岩、角闪片岩、糜棱化花岗岩和花岗岩四种。经回判发现,所建立的Fisher判别函数识别岩性的正确率达80. 9%。该研究证实运用Fisher判别分析法识别基底岩性的可行性较高。
This paper is concerned with a study in response to complex lithology and fewer cores,as occurs when drilling takes place in the basement in the central uplift zone of Songliao Basin.The study using Well Longtan 1 as an example involves looking at the case where the basement of the central paleo-uplift zone in Songliao Basin consits mainly of metamorphic and magmatic rocks and determining basement lithology by fisher discriminant analysis and combined with logging data.The results show that the basement lithology in the central uplift zone of Songliao Basin can fall into four types:chlorite schist,amphibolite schist,mylonitized granite and granite;and the Fisher discriminant function offers a correct lithology identification rate of up to 80.9%.This study validates that Fisher discriminant analysis is more feasible to identify basement lithology.
作者
郭剑南
单玄龙
郝国丽
Guo Jiannan;Shan Xuanlong;Hao Guoli(College of Earth Sciences,Jilin University,Changchun 130061,China)
出处
《黑龙江科技大学学报》
CAS
2019年第1期60-65,共6页
Journal of Heilongjiang University of Science And Technology
基金
国家自然科学基金项目(41472304)
关键词
岩性识别
FISHER判别
松辽盆地中央隆起带
变质岩
测井
lithology recognition
Fisher discriminant analysis
central paleo-uplift belt of Songliao Basin
metamorphic rock
well logging
