砂泥岩薄互层测井资料解释方法

从分析薄互层的特征入手,采用反褶积方法对单条测井曲线做提高分辨率的处理,并调整电阻率测井曲线,使其与提高了分辨率的泥质含量及孔隙度测井曲线的纵向分辨率协调、在此基础上,按一定的解释模型计算出孔隙度和饱和度等参数。实际计算表明,本方法改善了储集参数的评价,降低了含水饱和度。

A METHOD OF LOG DATA INTERPRETATION FOR THIN LAMINATED SAND/SHALE FORMATION

Log interpretation for thin laminated sand/shale formation has been a difficult and important issue for years. An approach to dealing with this problem based on conventional log data has been discussed. The vertical resolution of logs is too low to distingush sand bed from shale bed exactly and the true parameters of the formation can not be established by using conventional interpretation method and some thin sand bearing oil/gas will be overlooked. The paper discribes the features of thin laminated sand/shale formation. The method proposed for enhancing the resolution of logs inclution of logs includes two steps. First, the vertical resolution of each log is improved by using deconvolution. Second, the resistivity log resolution is matched with GR log through reconstruction resistivity log. This technique has been used successfully to improve the resolution and get reasonable water saturation. Example of processing result is presented. The comparision of the result with the result of conventional method is also presented.