三维地震勘探资料岩性处理技术及应用

3D Seismic Prospecting Data Lithologic Processing Technology and Applications

上海大屯能源股份有限公司徐庄煤矿西部采区的7煤层,岩浆岩侵入情况较为复杂,由于区内钻井密度较少,使用常规手段很难圈定岩浆岩及煤层变焦区的分布范围。为此,河北省煤田地质局物测队应用中国矿业大学催若飞教授的岩性处理技术对徐庄煤矿西部采区进行了三维地震资料岩性处理工作。其中包括波阻抗反演处理、谱分解处理和地震相分析。最后利用徐庄煤矿西部采区三维地震数据体、波阻抗数据体、地震属性切片和地震相切片进行岩性综合解释,利用三种方法解释成果,最终确定了岩浆岩的分布范围;确定7煤层变焦区的分布范围。和已知钻探资料相比,圈定的位置精细、准确。

The No.7 coal seam in western winning district, Xuzhuang coalmine of the Shanghai Datun Energy Source Co. Ltd., has suffered complicated magmatie intrusion. Since lesser amount boreholes in the area, it is hard to cycle out distribution extent of magmatie rocks and coal seam natural carbonization. By this, the Geophysical Prospecting, Surveying and Geological Exploration Team, Hebei Bureau of Coal Geological Exploration applied lithologic processing technology developed by Prof, Cui Ruofei of the China University of Mining and Technology processed 3D seismic data in western winning district of Xuzhuang coalmine, including natural impedance inversion, spectral decomposition and seismic facies analysis. Finally to use 3D seismic data volume, natural impedance data volume, seismic attribute slices and seismic facies slices in the area carried out comprehensive lithologie interpretation, by the use of interpreted results from above 3 methods, defined distribution extent of magmatie rocks and No.7 coal seam natural carbonization. Compared with known drilling data, the cycled positions this time are more precise and accurate.