VSP走廊叠加倾角时差校正  

Dip-moveout-correction (DMO) for VSP corridor stack.

作　　者：孟恩[1] 牟风明[2] 赵彦青[3] 徐刚[3] 

机构地区：[1]山东省青岛市中国海洋大学地球科学学院,266071 [2]胜利油田物探公司 [3]同济大学

出　　处：《石油地球物理勘探》2005年第6期700-702,共3页Oil Geophysical Prospecting

摘　　要：当地层倾斜时,利用常规VSP走廊叠加记录标定层位存在误差,而且此误差随着地层倾角的增大而增大, 随着井下检波器与地层分界面之间的距离减小而减小。可见此种误差是不能忽略的。本文从VSP观测方式及地 震波的传播路径入手,指出了误差来源,得出了该误差与倾角大小、检波器位置及走廊的关系,导出了走廊叠加 倾角时差校正公式。经理论记录试算与实际资料处理,表明该方法是有效的。Using ordinary VSP corridor stack section to label the horizons often causes errors when dip formation exists, and these errors increases with dip of formation increasing and decrease with the distance between the downhole geophone and interface of formations decreasing. Obviously, this kind of error can not be negligible. Starting from VSP surveying geometry and spreading path of seismic wave, the paper pointed out the source of the errors, got the relationship between the error and dip size, geophone position and corridor and deduced DMO formula for corridor stack. It was shown by theoretical test and real data processing that the method is effectiveness.

关 键 词：VSP走廊叠加 地层倾角 时差校正 层位标定 

分 类 号：P631.443[天文地球—地质矿产勘探] TU238.2[天文地球—地质学]