摘要
在比较分析了C.Flaum等人先后提出的提高密度测井纵向分辨率的短源距视密度法和改善泥饼补偿精度的几何响应匹配法的基础上,提出了一种新的增强密度测井纵向分辨率的交叉褶积补偿法。该方法克服了第一种方法中用短源距计数率求密度受井眼、泥饼影响大的弱点,也克服了第二种方法中改善补偿密度的纵向分辨率不明显的不足。该处理技术通过测量条件和仪器参数的合理选择,从常规的补偿密度长、短源距计数率响应出发,采用短源距计数率求地层视密度,利用交叉褶积获取极板前浅层区内的密度信息,并以此对短源距视密度曲线进行泥饼校正,从而获得有最佳纵向分层能力(可优于或相当于短源距计数率曲线的纵向分辨率)和最佳井眼与泥饼补偿的地层密度测量值。
Analyzing and comparing the apparent density method of near detector enhancing vertical resolution of density logs (method A), presented by C Flaum et al, and geometrical response matching method improving compensation precision of mud cake(method B), presented by C Flaum et al. we have developed a cross-convolution compensation that enhances vertical resolution of density logs. The new method overcomes the defects that the larger effect derived from the borehole and mud cake in the method A and that vertical resolution improved little Choicing reasonably the measure conditions and apparatus parameters, we can get the density information within the shallow layer in front of ploar plate by cross-convolution, after obtaining apparent density by counting rate of near detector, based on the conventional counting rate response of far and near detector Futhermore, the apparent density curve of near detector can be made correction for mud cake Consequently, the strata density can be obtained with the best vertical resolution and the best compensation for borehole and mud cake.
出处
《江汉石油学院学报》
CSCD
北大核心
1993年第3期45-52,共8页
Journal of Jianghan Petroleum Institute
关键词
核测井
地层密度测井
分辨率
褶积
radioactivity logging
formation density logging
response functions
resolution
[cross-convolution]
[mud cake compensation ofborehole]
