摘要
侵入煤层的岩浆岩对煤矿的高效开采有重大的影响,为此识别煤层的岩浆岩具有重要意义。基于属性模式识别的三维地震勘探解释方法能够探明原生煤层与岩浆岩的空间产状形态,以淮北矿区为研究区,开展岩浆岩侵入煤层区三维地震响应与识别研究。选取淮北矿区岩石物理参数建立岩浆岩侵入区地质模型,对侵入区地质模型进行地震正演模拟,提取了岩浆岩侵入区内岩浆岩、天然焦和原生煤层的地震瞬时振幅属性,分析并总结了岩浆岩侵入区内岩浆岩、天然焦和原生煤层的地震属性响应特征。最后以淮北BZ矿区三维地震资料为例,对研究区内的岩浆侵入情况进行解释与识别,利用钻孔资料匹配了研究区岩浆岩侵入区混合层的地震响应特征,采用3种模式对采区目的层岩浆岩侵入程度进行了识别和评价,取得了较好的效果。研究成果可为类似矿区提供参考。
The intrusion of magmatic rock into coal seam has a significant impact on the efficient mining of coal mine,and there is a great significance to identify the magmatic rock in coal seam.The 3D seismic exploration interpretation method based on attribute pattern recognition can determine the spatial occurrence of primary coal seam and magmatic rock.Taking Huaibei mining area as the research area,the study of 3D seismic response and identification of magmatic rock intrusion into coal seam area is carried out.Selecting the physical parameters of rocks in Huaibei mining area,a geological model of magmatic rock intrusion area is established.Seismic forward modeling is conducted on the geological model of the intrusion area,the seismic instantaneous amplitude attributes of magmatic rock,natural coke,and primary coal seams in the intrusion area are extracted.The seismic attribute response characteristics of magmatic rock,natural coke,and primary coal seams in the intrusion area are analyzed and summarized.Finally,taking the 3D seismic data of the BZ mining area in Huaibei as an example,the magma intrusion situation in the study area is explained and identified.The seismic response characteristics of the mixed layer in the study area are matched with the drilling hole data.Three modes are used to identify and evaluate the degree of magma intrusion in the target layer of the mining area,and it has achieved a good result.The research result can provide a reference for the similar mining areas.
作者
白瑜
BAI Yu(Xi'an Research Institute(Group)Co.,Ltd.of China Coal Technology&Engineering Group,Xi'an 710077,Shaanxi,China)
出处
《矿产与地质》
2023年第5期1051-1056,共6页
Mineral Resources and Geology
基金
中煤科工集团科技创新创业资金专项项目“煤层气富集区地震OVT处理与解释关键技术研究”(2023-TD-QN009)资助。
关键词
三维地震勘探
岩浆岩侵入区
天然焦
地震属性
地震正演
3D seismic exploration
magmatic rock intrusion area
natural coke
seismic attribute
seismic simulation
