摘要
地震波在孔隙介质中存在衰减现象,而利用其中的衰减现象基本特征,进行煤系地层富水性预测的研究鲜有报道,主要原因是对孔隙介质的衰减特征体现方式、衰减特征评价体系等方面缺乏较为深入的研究,且评价体系的有效性未得到验证。基于衰减特征在地震频谱上的基本性质,提出一种理论上切实可行的富水评价指标。基于数值模拟对富水评价指标的有效性进行验证,并应用该指标对煤层顶板富水性较强的Ycw区煤系地层中直罗组砂岩的富水性进行预测。结果表明:所研究的基于衰减特征预测的直罗组砂岩富水性案例能为煤矿安全开采提供参考。
Seismic waves are attenuated in porous media,and there are few reports on the prediction of water-richness of coal-measure formations by using the basic characteristics of the attenuation phenomenon.The main reason is that there is a lack of in-depth research on the manifestation of attenuation characteristics of porous media and the evaluation system of attenuation characteristics,and the effectiveness of the evaluation system has not been verified.Based on the basic properties of attenuation characteristics in seismic spectrum,a theoretically feasible water-rich evaluation index was proposed.Based on the numerical simulation,the validity of the water content evaluation index was verified,and the index was used to predict the water-rich sandstone of the Zhiluo Formation in the coal-measure strata of the Ycw area with strong water-rich roof of the coal seam.The results show that the Zhiluo Formation sandstone water content case predicted based on attenuation characteristics can provide a reference for the safe mining of coal mines.
作者
黄忠正
莫仕林
邹冠贵
张钊基
HUANG Zhong-zheng;MO Shi-lin;ZOU Guan-gui;ZHANG Zhao-ji(China Energy Group Ningxia Coal Industry Co.,Ltd.,Yinchuan 750011,China;State Key Laboratory of Coal Resources and Safe Mining,Beijing 100083,China)
出处
《科学技术与工程》
北大核心
2023年第4期1406-1413,共8页
Science Technology and Engineering
基金
国家重点研发计划(2018YFC0807803)
煤炭资源与安全开采国家重点实验室开放课题(SKLCRSM20KFA07)。
关键词
地震波
衰减
富水性
预测
seismic wave
attenuation
water content
predict
