基于模型的地震反演在煤田中的应用

Application of Seismic Inversion Based on Model to Coal Field

该文重点介绍了基于模型的波阻抗反演的基本原理、实现流程、关键环节以及在煤田中的应用。基于模型的测井约束反演技术,是在精确层位标定、层序划分及煤层精细对比的基础上,并利用测井资料垂向分辨率高和地震资料横向分辨率高的特点,对反映煤层变化的波阻抗等参数进行求取,以研究煤层的分布及其变化细节。通过山西某煤田实际应用,取得了较好的效果,得到了采区煤层分布的情况,为煤矿的开采提供了更多的地质信息。

This paper mainly described the basic principle,realization flow,the key link of wave impedance inversion based on model and its application to coal field.Logging-constrained seismic inversion technology based on model,which is on the basis of accurate horizon calibration,sequence classification and fine coal seam comparison,that is the wave impedance parameters reflecting the coal seams change are calculated by logging and seismic data with high vertical resolution and high horizontal resolution respectively in order to study the distribution of coal seams and its change in detail.The practical example of a coal field in Shanxi province shows that the method is effective.The distribution of coal seam in this area is obtained,and it provides more geological information for coal mining.