摘要
风化壳结构判识是石油地质研究的一项重要内容,但直接利用原始测井曲线进行风化壳结构识别却有很大难度,需要用多元统计方法把多种测井资料转化成少数几个互相独立又包含原有资料大部分信息的综合指标,即主成份值。以济阳坳陷风化壳为例,主要采用GR、SP和AC资料,将主成份分析(PCA)法引入到利用测井资料识别风化壳结构的研究中。针对同一风化壳不同结构层之间的测井资料主成份值往往存在差异的现象,在单井分析求取各风化壳结构层的测井资料主成份值的基础上,再通过多口探井主成份的统计分析,建立了风化壳结构层与测井资料主成份的统计关系图版。该图版能反映出原岩的黏土化程度和原始结构保存程度,可用来对无取心资料的探井进行风化壳结构的识别与划分。
Identification of weathered crust configuration(WCC) is important in petroleum geology study,but is difficult if merely directly utilizing log curves.It is necessary to convert several logging data with multivariable statistic method to a few integrated indexes,i.e.the principal component values of logging data,which are independent with each other and cover most information in the original data.Taking the weathered crust in Jiyang Depression as an example,the principal component analysis(PCA) method has been introduced into a research of identifying WCC with logging data,mainly including GR,SP and AC.Aimed at phenomena that principal component values of logging data in different configuration layers are different even in same weathered crust, based on PCA of logging data of individual exploration well,established are statistic relation chart between WCC layer and its principal component values by means of statistic analysis on several exploration wells.The chart reflects degrees of clay-forming and original-structure-preserving in original rock,and can be used to identify WCC for exploration wells having not been cored.
出处
《测井技术》
CAS
CSCD
2007年第6期583-587,共5页
Well Logging Technology
基金
中国石化股份有限公司科技项目"济阳坳陷第三系不整合油气藏形成与分布规律"(项目编号:P06012)
关键词
测井资料
主成份分析(PCA)
风化壳结构
判识图版
济阳坳陷
logging data,principal component analysis(PCA),weathered crust configuration,identification chart,Jiyang Depression
