西藏伦坡拉地区地震资料成像方法研究  

On Seismic Data Imaging Method for Lunpola Region in Tibet

作　　者：周斌 

机构地区：[1]中石化石油工程地球物理有限公司江汉分公司,湖北潜江433100

出　　处：《江汉石油职工大学学报》2014年第6期8-10,共3页Journal of Jianghan Petroleum University of Staff and Workers

摘　　要：西藏伦坡拉盆地受藏北大断裂的控制作用,地层破碎,断裂、逆冲推覆体等地质现象错综复杂,地下地质构造高陡。同时由于表层岩性的差别,近地表地层厚度与速度横向变化剧烈,造成采集单炮干扰波复杂,地震波吸收衰减严重,资料信噪比整体很低。为此,开展了层析静校正、精细速度分析、偏移成像方法试验等方面的研究。通过实际资料的应用,剖面信噪比有了明显的改善,波组特征更加清晰,达玉山断裂构造带的成像效果得到明显提高。Under the control of major dislocation in northem Tibet, Lunpola basin has a complicated and steep subsur- face geologie formation. Due to its surface lithological diversity and great lateral change of its near--surface formation thickness and velocity, gathered single--shot disturbing wave is complex~ seismic wave absorption attenuation is se- vere and data SNR is low as a whole. Therefore, the research is launched in tomographic static correction, fine ve- locity analysis and migration imaging method test. The application of the research makes the sectional SNR improve obviously, wave group characteristics clearer and imaging result of fault structure belt in Dayu Mountain improve significantly.

关 键 词：西藏伦坡拉盆地 层析静校正 逆冲推覆体 精细速度分析 偏移成像 

分 类 号：P631.4[天文地球—地质矿产勘探]