地震波速度的纵、横向变化分析

作者就某浅海油田两条连井地震剖面的处理与解释中所涉及的地震波速度的纵、横向变化规律研究方法予以讨论.研究用于地震解释的速度,包括两个方面,其一,研究速度的纵、横向变化,确定合适的成图速度;其二,研究地层的层速度,为地层解释和岩性预测提供参数.地震测井和VSP测定的速度精度较高,但剖面上的井测定的速度资料很少,不足以控制速度的横向变化.因此,利用地震剖面上的速度谱资料来确定速度的纵、横向变化,具有重要的现实意义.

A research on the vertical and horizontal change rules of seismic wave velocity

This paper discusses the means to the vertical and horizontal change rules of seismic wave velocity according to proceeding and explanation of two seismic sections joining wells in a shallow sea oil field.Seismic wave velocity is a very important parameter in seismic explanation,and its improper choice can bring on the geologic effects of inaccurate seismic deep,deformation construction shape and badly inconvenient seismic explanation.The research of seismic explanation's velocity includes two aspects.One aspect is to research the vertical and horizontal velocity change to ensure the appropriate chartting velocity,and the other aspect is to research the stratum's interval velocity to provide parameters for stratum's explanation and lithology forecast.Although the seismic log and VSP velocity are accuracy,but determined velocity data of wells on sections are little and insufficient to control the horizontal change of velocity.So using seismic section's velocity spectrum to ensure the horizontal change of velocity is of important real significance.