【摘要】 水平切片、沿层切片、层拉平切片是目前地震解释中的常用手段,地层切片作为一种新的地震沉积学技术已受到地球物理界的关注。但是由于不少物探工作者对地震切片的物理意义和地质意义仍存在模糊的认识,制约了此项技术的推广应用。本文以模型研究为前提,对水平切片、沿层切片和地层切片的应用要素进行了理论探讨,研究发现,即使水平切片所选时间不准(波峰、波谷或过零点),构造的整体特征还是能够得到展示,这有助于从理论上阐明切片的物理意义。时窗与切片属性值有很大关系,一方面表现在时窗大小的选取上,另一方面体现在属性本身的特性上,同时还与时窗的位置有很大关系。文中还重点对地层切片进行了讨论,指出了地层切片的物理意义和优点。相对常规层拉平技术,地层切片能够使地层解释变得更加直观,同时使由地层切片提取的时窗属性更有地质意义。本文最后还对地层切片的分辨率做了理论探讨,模型研究结果表明,薄层的切片分辨率可以突破1/4地震波长的极限。更多还原

【Abstract】 Time slice, horizontal slice and horizon-balancing slice are common-used tools in current seismic interpretation. The strata slice, as a new seismic sedimentological technique, is riveted close attention by geophysical industry. But since a lot of geophysical workers still have confused idea about physical and geologic meanings of seismic slices, which restricts the popularization and application of the technique. Taking the model study as precondition, the paper makes theoretical probe into application elements of time slice, horizontal slice and strata slice. The studied results showed even the time selected by time slice are inaccurate (wave peak, trough and zero-cross point), the total structural feature is still able to be shown, which is helpful to explain the physical meanings of slices theoretically. There is large relationship between the time windows and attributes values of slices, showing in the selection of window size, and on the other hand, in the characters of attribute itself, and is also largely relative to the position of time windows. The paper also particularly discussed on the strata slice that can make the strata interpretation more straightforward and also make the time windows’ attribute have better geological meaning. In the end of the paper, we discussed theoretically about the resolution of strata slice. The model-studied results showed the resolution of thin-layer’s slice can break the limitation of 1/4 seismic wavelength.更多还原