磁化率测井响应特征及主控因素分析

发布时间：2018-04-26 14:41

本文选题：磁化率测井 + 磁化率　；参考：《油气地质与采收率》2017年02期

【摘要】：磁化率测井是一种高效环保的测井手段,其理论和应用方法的不完善是未在油气田广泛应用的根本原因。以河套盆地第四系为研究对象,综合研究区A,B,C钻探孔取心资料和磁化率测井数据,结合沉积构型和地磁理论,确立磁化率测井与各项地质因素的关系,明确磁化率测井响应的主控因素,建立研究区磁化率测井与常规测井相结合的测井响应模式。结果表明:磁化率在有机质丰度高、(顺)磁性矿物丰富、泥质—粉砂质夹层发育和泥浆侵入段呈现高幅度异常;磁化率与有机质含量的变化趋势高度吻合,研究区钻探井段磁化率最大值为137×10-5SI,磁化率与磁性矿物相对含量的相关系数达0.87,与水平层理和泥浆侵入规模呈正相关;磁化率标准偏差百分比曲线反映沉积环境和水动力条件的变化。结合测井响应特征,磁化率测井可广泛应用于碎屑岩沉积层序研究、烃源岩评价、粘土矿物识别和精细储层表征。
[Abstract]:Magnetic susceptibility logging is a kind of high efficiency and environmental protection logging tool. The imperfect theory and application method is the fundamental reason why it is not widely used in oil and gas fields. Taking the Quaternary system of the Hetao Basin as the object of study, the core-taking data and magnetic susceptibility logging data from the AZB C drilling hole in the study area, combined with the sedimentary configuration and geomagnetic theory, are used to establish the relationship between the magnetic susceptibility logging and various geological factors. The main control factors of the magnetic susceptibility logging response were determined and a logging response model combining magnetic susceptibility logging with conventional logging was established. The results show that the magnetic susceptibility is abundant in the high organic matter abundance (paramagnetic) minerals, the development of the muddy silty intercalation and the mud invasion section show high amplitude anomaly, and the magnetic susceptibility is highly consistent with the change trend of the organic matter content. The maximum value of magnetic susceptibility is 137 脳 10 ~ (-5) SI, and the correlation coefficient between magnetic susceptibility and relative content of magnetic minerals is 0.87, which is positively correlated with horizontal bedding and mud invasion scale. The percentage curve of standard deviation of magnetic susceptibility reflects the variation of sedimentary environment and hydrodynamic conditions. The magnetic susceptibility logging can be widely used in the study of depositional sequence of clastic rocks, source rock evaluation, clay mineral identification and fine reservoir characterization.
【作者单位】：中国石油大学(北京)地球科学学院;中国地质科学院地质力学研究所;中国地震局地球物理研究所;
【基金】：中国地质调查局项目“特殊地质地貌区填图试点岩石物性测量”(DD20160060)
【分类号】：P631.81

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