【摘要】 静校正问题影响着地震波成像和构造解释的精度,国内几十年的静校正研究历程表明,复杂的近地表结构是影响地震勘探静校正量的重要因素。为此,从用近地表速度模型模拟复杂近地表结构、近地表结构底界的界定、复杂近地表结构的历史变迁研究入手,逐渐形成了一套成熟的静校正办法,即用层析反演近地表速度模型、模拟近地表结构,通过速度模型和初至时间计算长、短波长的静校正量,从而消除复杂近地表结构对地震勘探成果的影响。更多还原

【Abstract】 The problem of static correction influences the accuracy of seismic imaging and structure interpretation.An overview on the research of static correction over the last several decades shows that complex near-surface structure is an important factor influencing the value of static correction.Based on a modeling of complex near-surface structure with the near-surface velocity model,a delineation of the bottom boundary of near-surface structure and a study of the evolution of complex near-surface structure,a set of static correction methods are developed,including tomographic inversion of near-surface velocity model for simulating near-surface structure,and calculation of static correction of long and short wavelengths by use of the velocity model and first arrival.These methods can eliminate the negative influences of complex near-surface structures on seismic exploration.更多还原