鄂尔多斯盆地东北部砂岩型铀矿地球物理测井参数特征和自然电位校正

Geophysical Logging Parameter Characteristics and Spontaneous Potential Correction for Sandstone Type Uranium Deposits in the Northeastern of Ordos Basin

鄂尔多斯盆地东北部是地浸砂岩型铀矿的主要产地,为了更好地进行地球物理解释研究,通过对研究区物性参数数据统计和对盆地测井响应及曲线特征分析,总结了岩性识别方法和划分规律,为精细化研究打下了良好的基础。根据自然电位影响因素,针对自然电位曲线漂移明显等情况,通过软件进行自然电位泥岩基线校正,对干扰进行滤波处理,有效改善了偏移现象,曲线数值变化范围缩小,基本符合自然电位测量规律,有助于自然电位曲线的地质应用,对找矿工作具有积极的指导作用。

Northeastern Ordos Basin is the main production area of in-situ leaching sandstone type uranium deposits.In order to better conduct geophysical interpretation,the physical property parameter data in the research area were collected in statistics to study their curve characteristics and logging response to rock types which laying a good foundation of lithology identification and layer division.Based on the influencing factors of spontaneous potential,response to situations such as significant drift of spontaneous potential curve,software was used to correct the baseline of spontaneous potential and filter out interference,which effectively improved the drift phenomenon,and narrowed the range of curve value variation,and the corrected data basically conforms to the measurement law of spontaneous potential.This research is helpful for the geological application of spontaneous potential curves and has a positive guiding role in mineral exploration work.