摘要
针对中国西部广泛分布的巨厚砾石或沙漠覆盖的表层问题,提出了一种新的思路,通过长排列小折射和微测井联合测深解决表层的厚度;利用连续介质理论,借助层析小折射来解决表层速度;最后利用空变时深曲线静校正方法来计算静校正量。实际应用表明,新思路对于解决巨厚低降速带地区的静校正问题有较大帮助。
Taking into account the geological features of the near surface structure of gravel deposits and huge sand dunes in western China,this paper proposed a new method to determine the depth of the near surface.The method includes three steps:determining the depth of the near surface by long-array refraction survey and joint measurement of up-hole survey and refraction survey,determining the velocity of the near surface by the theory of continuous medium and tomographic inversion;and calculating the quantity of statics by spatially-variant time-depth curve.An example was presented which indicated that the new method is helpful in resolving the static problem in area of huge thick near surface.
出处
《勘探地球物理进展》
2009年第2期107-111,共5页
Progress in Exploration Geophysics
关键词
小折射
微测井
联合测深
连续介质
层析反演
空变时深曲线
静校正
refraction
up-hole survey
depth measured by up-hole and refraction surveys
continuous medium
tomographic inversion
spatially-variant time-depth curve
static correction
