线性降维映射方法识别火山岩岩性

随着世界对油气资源的需求不断增加,火山岩油气藏的勘探和开发逐步成为油气储量、产量的新的增长点。火山岩岩性研究是火山岩油气储层研究的基础。常规的识别岩性方法不是很有效,作者曾用主成份分析方法来识别火山岩岩性,取得了一些效果,能够把基性岩,中性岩和酸性岩三大类岩石区分开来。但当岩性中也包括结构时,识别的效果就不是很理想,很难将流纹岩和流纹质凝灰岩区分开来。对岩石薄片鉴定,全岩分析以及综合测井曲线得到的火山岩岩样应用线性降维映射方法来识别,取得了很好的效果,它能将常规主成份分析方法很难区分的流纹岩和流纹质凝灰岩区分开来。

Linear dimension-reducing mapping method to identify the lithology of voleanic rocks

With the increasing demand for the resources of oil and gas,the development and exploration of volcanic rock reservoirs gradually become the new increase of the output.The study of volcanic rock lithology is the basis of volcanic rock reservoirs.Common methods in identifying volcanic lithology are not very effective.The principal component analysis method has been used to simply identify the lithology of volcanic rocks,and the results are good,but when the information of texture is included in the rock's name,this method is not very effective.The Linear dimension-reducing mapping method is applied to the volcanic rocks samples based on rock slices,whole rock analysis and logging traces.By this method,andesite,basalt,rhyolite and rhyolitic tuff are indentified and classied well.Compared with the method of principal component analysis,the method achieves much better results and it can separate rhyolite from rhyolitic tuff which is very difficult to be divided in the principle component analysis method.