摘要
为了研究构造煤的地震响应特征及识别性,根据井田实际测井揭示的原生结构煤与构造煤的弹性参数,建立了2种类型共计8个构造煤地震地质模型,利用射线追踪法计算了这8个模型的地震相应特征并提取地震属性进行了对比分析。结果表明:构造煤与原生煤的地震反射特征存在明显差异,单一煤层结构情况下,构造煤厚度越大其地震剖面相应特征越明显,但厚度对其属性特征不存在影响。双层及三层煤层结构情况下,构造煤厚度直接影响了其属性异常强度,且与构造煤发育的煤层内部部位无关。通过多组地震地质模型的正演模拟,从理论上证明了构造煤可以应用地震属性进行识别。
To study tectonoclastic coal seismic response features and identifiability,according to revealed elastic parameters of primary structural coal and tectonoclastic coal through well loggings in the minefield have established totally 8 of 2 types seismic-geologic models. Through ray tracing method has computed corresponding seismic features of the 8 models,picked up seismic attributes and carried out comparative analysis. The results have shown that there are obvious differences between seismic reflection features of tectonoclastic coal and primary structural coal. Under a single coal seam structure,the larger the tectonoclastic coal thickness,the more obvious the corresponding features on seismic sections,but thickness have no impact on attribute features. Under the double and triple coal seam structures,the thickness of tectonoclastic coal can directly impact the attribute anomaly intensity,and have nothing to do with internal part of tectonoclastic coal developed coal seams. Through multiple seismic-geologic models forward simulation has theoretically proved that tectonoclastic coal can be identified through seismic attributes.
出处
《中国煤炭地质》
2017年第12期78-81,共4页
Coal Geology of China
关键词
构造煤
地震响应
正演模拟
地震属性
tectonoclastic coal
seismic response
forward simulation
seismic attribute
