叠前时间偏移技术在松辽盆地应用研究  

Application of Prestack Time Migration in Songliao Basin

作　　者：赵玉莲[1,2] 成旭波 鲁烈琴[2] 丁彩琴[2] 

机构地区：[1]成都理工大学,四川成都610059 [2]中国石油勘探开发研究院西北分院,甘肃兰州730020 [3]浙江省地球物理地球化学勘察院,浙江杭州310005

出　　处：《天然气地球科学》2010年第6期1041-1045,共5页Natural Gas Geoscience

摘　　要：针对松辽盆地某区地震资料特点和数据处理难点,进行了针对性的三维静校正、叠前组合去噪和叠前时间偏移处理,取得了比较显著的效果。同时从叠前时间偏移的基本原理和实现过程,讨论了该区叠前偏移的孔径、反假频参数、速度模型优化及射线追综方法关键参数的选取,通过叠前时间偏移和叠后时间偏移结果的对比与分析可知,叠前时间偏移使地震资料的成像精度得到了较大幅度的提高,剖面上断点清楚,断层清晰,波组特征明显。Here we introduced the application of pre-stack time migration technology in Songliao basin.The 3D static correction,pre-stack combination noise attenuation and pre-stack time migration processing were carried out in this area and made a relatively obvious effect.Meanwhile,we discussed the key parameters such as aperture,aliased factor,velocity model adjusting and ray-tracing method based on the pre-stack time migration principle and realization.By comparing and analyzing the results of pre-stack and post-stack migrations,it indicated that pre-stack time migration of seismic data substantially increased the imaging precision,the breakpoints and faults more clear and wave groups more obvious.

关 键 词：松辽盆地 静校正 叠前时间偏移 速度 模型 孔径 

分 类 号：TE132.14[石油与天然气工程—油气勘探]