【摘要】 煤层中构造煤的分布位置和厚度对瓦斯突出和煤层气开采影响较大。本文通过建立构造煤在煤层中的不同分布位置和厚度模型,褶积得到入射角为0-35°的地震记录,并分析两种情况下的煤层AVA响应特性。考虑到资料信噪比对煤层AVA响应的影响,在褶积记录中加入不同信噪比的高斯白噪声进行分析,认为当资料信噪比低于2时,含构造煤煤层的AVA响应特性受影响较大。通过以上分析,本研究可用于指导地震勘探中的构造煤解释。更多还原

【Abstract】 The outburst of gas and CBM mining are seriously influenced by the distribution and thickness of tectonic coals in coal seams. The paper obtained the seismic recordings with the incidence angle from 0 to 35 °by forward modeling the different distribution and thickness of tectonic coals in coal seams, and the AVA corresponding of both cases were analyzed. The Gaussian White noise with different Sn R was added to the seismic recordings, for discussing the characteristics of AVA corresponding influenced by the SNR of recordings. And we realized that the AVA corresponding was serious affected when the Sn R was less than 2. Though the above analysis, we believe this study can guide the exploration of tectonic coals.更多还原