地震属性分析技术在煤田陷落柱研究中的应用

Attribute analysis in seismic response of collapsed column

陷落柱是造成煤层透水事故的重要隐患,三维地震是识别陷落柱等地质异常体的常用和有效手段,但在生产实践中,存在"识别不清、定性不准"的现象,影响治理方案的实施;同时,充水型陷落柱的三维地震响应特征不明确,应用三维地震进行陷落柱充水性评价,目前在行业内鲜有成功案例。本文通过实例对比,证实相干、曲率、倾角、相位、纹理等多属性分析技术可以有效提高陷落柱识别的准确度和可靠性;应用地震属性分析技术进行陷落柱充水性评价,证实了方法的可行性,进而预测了充水型陷落柱的三维地震响应特征。该成果可为煤田利用现有地震资料进行陷落柱研究及隐蔽致灾因素排查和治理提供帮助。

The collapsed column is a major safety risk causing water-inrush accidents in coalfields.Seismic response of water-rich collapsed columns is not clear.There are very few successful cases to predict water-rich collapsed columns on conventional 3 D seismic methods.Based on our research,it is proved that water-rich collapsed columns can be identified with 3 Dseismic attributes approaches provided by GeoEast System such as coherence,curvature,dip,phase,and texture.The attribute analysis is also applied to evaluate the water abundance assessment of collapsed columns,which proves the feasibility of the proposed method.Seismic response characteristics of water-rich collapsed columns can be predicted with the proposed method.Our research demonstrates that the proposed method is an effective solution for collapsed columns study in coalfields based on existing seismic data.