煤田地震勘探中的可变线元采集技术及其应用

在复杂的地表地震地质条件及深部地震地质条件下,如何获得满足复杂地震勘探解释所需资料,有效地在资料采集费用和资料质量间作出优化选择显得尤为重要.为此,根据三维地震勘探面元叠加理论提出的可变线元采集技术,通过合理的布置激发点与接收点的位置,使得CMP点均匀分布在一个标准线元内.线元具有可分性,在不改变观测系统的前提下,可把标准线元调整到大小合适的尺寸,以便能够在增加覆盖次数和提高分辨率之间做出优化选择,为资料处理拓展空间,为资料解释提供多种不同覆盖次数的地震时间剖面.

Variable Line Element Acquisition Technique and Its Application in Coalfield Seismic Prospecting

Under the complicated surface and deep seismic-geologic conditions,how to get necessary data to satisfy complex seismic prospecting interpretation,the optimized selection of whether the data collection cost or data quality is especially important.Thus,the variable line element acquisition technique is derived from 3D seismic prospecting surface element stacking theory;it rationally lay out shotpoint and receiver site to make the CMP points evenly distributed in a standard line element.The line element has divisibility,under the precondition of not to change the field setup,may adjust the standard line element to an applicable size,so that can make optimized selection between to add on fold number and to improve resolution.Thus we can widen the data processing extent,provide a great variety of seismic time section with different fold number.