岩浆岩覆盖的深部煤层高精度三维地震勘探设计及研究

Design and Study of High-precision 3D Seismic Exploration for Deep Coal Seam Covered by Magmatic Rocks

摘要:

高精度三维地震勘探技术在提高数据采集密度的同时，可以有效提高地震信号的信噪比及纵横向分辨率。山东济宁地区岩浆岩高度发育，对下伏地层反射有屏蔽作用，以及形成多次波对煤层有效波具有干扰作用；煤层埋藏较深，普通三维地震勘探煤层反射波能量弱、信噪比低。济宁研究区通过宽频、宽方位、高密度高精度三维地震设计精细记录地震波场，提高纵横向分辨率，确保小构造的解释精度，总结出一套适合岩浆岩覆盖的深部煤层地区的高精度三维地震勘探技术。

Abstract:

High precision 3D seismic exploration technology can effectively improve the signal-to-noise ratio and vertical and horizontal resolution of seismic signal while increasing the data acquisition density. Magmatic rocks are highly developed, which can shield the reflection of the underlying strata, and the formation of multiple waves can interfere with the effective waves of the coal seam In Ji'ning area in Shandong province.The coal strata are deeply buried, and the reflected wave energy of the common three-dimensional seismic exploration coal strata are weak, and the signal-to-noise ratio is low. A set of high-precision three-dimensional seismic exploration technologies suitable for deep coal strata area covered by magmatic rock have been summarized. It can record the seismic wave field precisely, improve the vertical and horizontal resolution, and ensure the interpretation accuracy of small structures in Xinhe exploration area in Ji'ning city.