摘要
无论是构造简单或者复杂的地方,高精度速度建模与反演一直是地震处理所追求的目标,为进一步提升复杂构造区域的速度建模精度,提升该区域的成像质量.文中以琼东南盆地陆架坡折区速度建模与反演为例,采用构造形态对速度反演过程进行约束,通过模型和实际数据验证了混合邻域构造约束建模与反演技术的有效性,解决了坡折大角度构造常规速度建模及反演技术存在速度异常的问题.结果表明:相对于常规速度反演方法,本文方法得到与地质更加吻合的速度场,能够更好地解决成像及岩性认识问题.结论认为:本方法在速度建模的过程中实现了自动提取构造张量并约束建模过程,提高陆坡下方速度精度,改善了坡折下方成像,该方法对于崎岖海底地区速度建模具有较大应用价值.
Either simple or complex structure,structure constraint velocity modeling and inversion method has been a seismic processing goal.By constructing constraint modeling,we can get a velocity volume which is more consistent with geological.By using this method can effectively solve the problem of imaging and lithology.Structure constraint velocity modeling is especially important in the complex structure areas.Mixed neighborhood structure constraint velocity modeling and inversion method is studied through model and actual data in Qiongdongnan basin.This new method can effectively avoid the illusion of velocity in the slope area with large structure angle by using tradition methods.Achieved the automatic-picked structure tensor constrainting is the biggest advantage of this method which can raise the velocity accuracy in the slope area and improve the structure imaging.This new method is very practical for the rough sea bottom area.
作者
任婷
邓勇
覃殿明
黎孝璋
彭海龙
欧阳敏
REN Ting;DENG Yong;QIN Dian-ming;LI Xiao-zhang;PENG Hai-long;OUYANG Min(CNOOC China Limited Zhanjiang Branch,Zhanjiang 524057,China;China Oilfield Services Limited,Geophysical Division Tepu Company,Zhanjiang 524057,China)
出处
《地球物理学进展》
CSCD
北大核心
2020年第5期1962-1968,共7页
Progress in Geophysics
基金
中海石油(中国)有限公司湛江分公司科研项目“南海北部大陆架西部井场调查关键技术研究”(ZYKY-2019-ZJ-02)资助.
关键词
构造约束
混合邻域
速度建模
构造张量
坡折
Structure constraint
Mixed neighborhood
Velocity modeling
Structure tensor
Slope
