摘要
地震分辨力一直是地震勘探研究的主要问题之一。本文在阐述了地震分辨力与地震分辨率差异的基础上,介绍了地震分辨力的定义、准则,讨论了地震分辨力同地震地质解释能力之间的关系和差异,重新认识了噪声与分辨力的关系。研究认为:地震分辨力是地震资料的一种客观存在,它只决定于地震子波的特性,与地震剖面中是否存在噪声无关。提高地震分辨力的惟一途径是改善地震子波本身的特性。提高地震资料的信噪比只能提高地震地质解释能力,不能从根本上提高分辨力。在地震分辨力一定的条件下,利用特殊的方法(技术)可以解释地层厚度小于1/4波长的薄层的变化,但这并不意味着地震分辨力的提高,仅仅说明地震地质解释能力的增强。
Seismic resolution is always one of major studied problems. On the basis of expounding the difference between the seismic identifying capability and seismic resolution, the paper introduced the definition and criterion of seismic identifying capability, discussed the relationship and difference between seismic identifying capability and geologic interpretation ability and renewed the knowledge about relationship between noise and identifying capability. The study showed that seismic identifying capability is a subjective existence of seismic data that only depends on the nature of seismic wavelet and is independent to whether the noises exists or not in seismic sections. The only way to improve seismic identifying capability is to improve the nature of seismic wavelet. Improving the S/N ratio can only improve seismic-geologic interpretation ability and cannot improve identifying capability fundamentally. Under the condition of fixed seismic identifying capability, using special method (technique) can interpret the variation in thin beds that the thickness of strata is less than λ/4,but never means that the seismic identifying capability will be improved and only illustrates that the seismic-geologic interpretation ability will be strengthened.
出处
《石油地球物理勘探》
EI
CSCD
北大核心
2005年第5期603-608,共6页
Oil Geophysical Prospecting
