运用自相关谱计算薄互层砂岩厚度  

CALCULATING THICKNESS OF THIN ALTERNATING LAYERS BY AUTOCORRELATION SPECTRUM

作　　者：周志才[1] 何樵登[1] 金抒辛[2] 李崇灿[2] 

机构地区：[1]吉林大学地球探测科学与技术学院,吉林长春130026 [2]大庆石油管理局地球物理勘探公司,黑龙江大庆163357

出　　处：《吉林大学学报（地球科学版）》2003年第1期96-100,共5页Journal of Jilin University：Earth Science Edition

摘　　要：在分析以往"计算薄互层砂岩厚度"技术基础上,通过大量的正演模型及提取多种特征参数等工作,优选出对薄互层砂岩厚度表征良好的一类特征参数———自相关谱。在自相关谱中着重研究了3种规律性较好的特征参数,即自相关谱振幅(Amax),第一零交叉时(t01)及三间隔延迟振幅比(A3 Amax)。阐述了3个特征参数与薄层砂岩厚度(小于λ 4)的关系,给出了反演的计算方法,并利用关系函数进行了定量的反演计算,得到了较高精度的结果。Basing on the analysis of former technique about calculating the thickness of sandstone of thin alternoting layers, a large number of forward modeling and extracting multi-character parameters, we have optimized a kind of character parameters-autocorrelation parameters which can represent the thickness of thin layer sandstone perfectly. The three character parameters with perfect regulation have be surveyed in autocorrelation spectrum: autocorrelation spectrum amplitude (Amax), the first zero-cross time (t01) and the ratio of three-interval delay amplitude (A3/Amax). We have described the relationship between the three character parameters and the thickness of thin layer sandstone (thinner than λ/4), also described the inversion calculating method. At the same time, we have developed the quantificational inversion calculation and achieved the effects with higher precision.

关 键 词：自相关谱 薄互层 砂岩厚度 反演 正演 精度 储层 油藏 

分 类 号：P618.130.8[天文地球—矿床学] TE13[天文地球—地质学]