摘要
将"两宽一高"(宽频带、宽方位、高密度)地震勘探技术应用于松辽盆地长岭凹陷黑82区块中,通过拓宽频带、缩小面元、增加覆盖次数和提高炮道密度等方法进行采集,再经过OVT域叠前时间偏移和叠前反演等技术处理,"两宽一高"新资料与常规三维资料相比,频带从10~85 Hz拓宽为4~100 Hz,信噪比由1.2提高到2,有效提升了地震资料品质,预测河道砂体精度与钻井资料对比吻合度达到90%以上。
The technology of“2W1H”(wide-band,wide azimuth and high-density)seismic exploration is applied to Hei82 block of Changling depression in Songliao Basin.The data are acquired by widening the band,reducing bin,increasing coverage times and shot density,and then processed by OVT domain prestack time migration and prestack inversion.Compared with conventional 3D data,the frequency band of new“2W1H”data increased from 10~85 Hz to 4~100 Hz,the signal-to-noise ratio is increased from 1.2 to 2,which effectively improves the quality of seismic data.The prediction accuracy of channel sand body is more than 90%comparing with drilling data.
作者
周佳和
徐聪
ZHOU Jia-he;XU Cong(College of Geo-exploration Science and Technology,Jilin University,Changchun 130026,China)
出处
《世界地质》
CAS
2020年第2期422-428,共7页
World Geology
基金
国家自然科学基金项目(41874125,41430322)。
关键词
松辽盆地
两宽一高
信噪比
Songliao Basin
wide-band
wide-azimuth and high-density(2W1H)
signal-to-noise ratio
