Research on the key technologies of coal precise 3D seismic detection
Over the past decade,the precision and capability of coal 3D seismic exploration have been significantly improved.Focusing on the four key stages of data acquisition,processing,interpretation,and dynamic service,the key technologies employed in 3D seismic exploration for precise detection of coal mine stratigraphic framework,geological anomalies,lithological distribution,and fluid distribution were elaborated,so as to significantly enhance the geological support capability of 3D seismic exploration in ensuring coal mine production safety.For data acquisition,fully digital high-density 3D seismic exploration elevated the signal-to-noise ratio of coal seam reflections and enhanced the resolution of small structural identification by reducing the CDP bin size and utilizing fully digital cymoscope to receive seismic waves.For data processing,techniques such as dynamic high-precision prestack deep migration imaging with mine-roadway constraints,5D processing based on high-density wide-azimuth OVT,and prestack Q-compensation for fidelity enhancement and frequency lifting substantially improved the imaging accuracy of seismic data.For data interpretation,comprehensive 3D interpretation was carried out through time section,horizontal slice,surface block slice,multi-attribute seismic analysis,and multi-information inversion,which expanded the application range of 3D seismic exploration.For dynamic service,the innovative model of remote expert dynamic service facilitated real-time communication between coal mine geologists and geophysicists,which ensured that the precision of seismic-geological outcomes met varying production stage requirements through phased and graded dynamic services.
3D seismicfull-digital high-densitymine-roadway constraint"ant+"multi-attributeseismic attributeremote expert dynamic service system
NETL
NSTL
万方数据
