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湖沼区高分辨地震勘探受各种因素影响难度较大，不能用地面常规方法施工。本文通过实例，介绍了在湖沼区进行高分辨地震勘探所采取的技术措施和成果，为高分辨地震勘探在湖沼区的应用提供了一个成功的范例。 相似文献
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浅层砾石发育区高分辨地震勘探受各种因素影响难度较大，难以采取常规“井炮”方法施工。本文通过实例，介绍了浅层砾石发育区进行高分辨率地震勘探所采取的技术措施和成果，为高分辨率地震勘探在厚层砾石发育区生产提供了一个成功的范例。 相似文献
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浅层砾石发育区高分辨地震勘探受各因素影响难度较大，难以采取常规“井炮”方法施工。本文通过实例，介绍了浅层砾石发育区进行高分辨率地震勘探采取的技术措施和成果，为分辨率地震勘探在厚层砾石发 育区生产提供了一个成功的范例。 相似文献
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水上煤田地震勘探方法及效果 总被引：3，自引：0，他引：3
山东的南四湖和黄县煤田龙口海域均有丰富的煤炭赋存。过去由于技术水平和设备能力的限制, 我国水上煤田物探起步较晚, 山东煤田物探测量队自１９９１ 年以来在山东龙口矿区北皂海域和南四湖区相继开展的几个水上高分辨地震勘探项目,取得了十分显著的效果,文章在总结经验的基础上将水上物探的方法和效果做简要介绍,以便读者了解我国水上煤田高分辨地震勘探的现状。 相似文献
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１９９２年以来,永夏矿区各矿井相继进行我高分辨地震勘探,本文就所取得的突出成果及验证情况作了全面的介绍,并分析了地震勘探成果的利用及效益。 相似文献
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文章介绍了在范各庄煤矿南三、南四采区运用高分辨三维地震、高精度磁法、瞬变电磁法进行综合勘探的成果，表明以采区高分辨率三维地震为主的综合勘探，在查明煤层赋存状况，断层、火成岩侵入，岩溶陷落柱发育，采用空区，断层导水性，第四系冲积层厚度及底部结构等方面均取得了较好的效果，对指导煤矿生产设施和施工，提高矿井回采率，安全生产等方面有重要指导意义。 相似文献
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随着电子和计算机技术飞速发展，地震仪器数字化和多道化，高分辨二维和三维地震己在煤矿采区广泛应用。十几年来取得了显著的经济效益和社会效益。为煤矿建设和生产提供了可靠的地质资料。作者从众多的采区高分辨二维和三维地震勘探出发，论述了有关概念，总结了技术力法，探讨了有关问题。 相似文献
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随着电子和计算机技术飞速发展，地震仪器数字化和多道化，高分辨二维和二维地震已在煤矿采区广泛应用。十几年来取得了显著的经济效益和社会效益。为煤矿建设和生产提供了可靠的地质资料。作者从众多的采区高分辨二维和三维地震勘探出发，论述了有关概念，总结了技术方法，探讨了有关问题。 相似文献
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野外地震资料采集的质量直接关系到地震勘探的成败。保证野外资料采集质量的关键是采集参数的选择。参数选择得当,就能有效地拓宽有效波频带范围,提高有效波的主频。以松辽盆地北部太平屯—宋芳屯高分辨率地震勘探区块的实际地质参数及相应的地震资料为基础,结合前人的工作经验,从地震波运动学的角度,确定了该地区高分辨率地震资料采集的参数,并分析了它对分辨率的影响程度。 相似文献
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综合物探探测煤矿采空塌陷区 总被引：6，自引：1，他引：6
简述了煤矿采空塌陷区的形成及影响，论述了高分辩地震法、α卡法和钻孔弹性波ＣＴ法的地球物理基础，对此３种物探方法的使用效果进行了比较，还列举了综合探测的应用实例。 相似文献
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Abstract. A high frequency deep-tow seismic survey was carried out in the Nankai Trough area in 1996. The objective of the survey was to obtain high resolution seismic sections and velocity profiles of the methane hydrate zone, inferred from the strong BSR events seen on conventional seismic data in the area. A special feature of the survey is that both the source and the streamer cable are towed close to the seabed. This special acquisition geometry requires special data processing to handle the varying source and receiver depths. A CMP floating datum processing sequence was designed which led to high quality sections of the shallow geology. A key step in the processing was devising a residual statics technique to compensate for errors in the measured depths.
The processing sequence was applied to a number of lines, totaling 200 km. The final data quality was highly variable. Some lines produced high quality sections and others, much poorer sections with few interpretable events. Conventional seismic data in the area also shows variation in the data quality so part of the reason is a variation in the sub-sea geology, but the deep-tow data is much more sensitive to change in conditions than conventional data. With the current acquired data and processing sequence the deep-tow system offers most advantages when 1) the water depth is around 1 km or greater, 2) the seabed and underlying geology is not too complex, and 3) the acquisition proceeds smoothly with regular shotpoints, slowly varying depths, and with accurate positioning. 相似文献
The processing sequence was applied to a number of lines, totaling 200 km. The final data quality was highly variable. Some lines produced high quality sections and others, much poorer sections with few interpretable events. Conventional seismic data in the area also shows variation in the data quality so part of the reason is a variation in the sub-sea geology, but the deep-tow data is much more sensitive to change in conditions than conventional data. With the current acquired data and processing sequence the deep-tow system offers most advantages when 1) the water depth is around 1 km or greater, 2) the seabed and underlying geology is not too complex, and 3) the acquisition proceeds smoothly with regular shotpoints, slowly varying depths, and with accurate positioning. 相似文献
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以永新工区高精度采集的地震资料为例,对高精度勘探的面元细分方法及细分处理资料的分辨率进行了评价。首先给出了面元细分的方法及面元细分对地震资料分辨率的影响,介绍了现有的一些分辨率计算方法。对于纵向分辨率,主要从λ/4传统薄层分辨率和高截频二个方面进行了讨论;对于横向分辨率,从菲涅耳带半径、防空间假频、Lindsey分辨率定义、考虑偏移孔径的分辨率等四个方面进行了分析、比较。通过研究,得出了有一定借鉴意义的结论:①在现有常规检波器条件下,面元细分处理对地震资料的分辨率影响较小,其变化不大;②在单道记录信噪比已较高的情况下,想通过提高覆盖次数来提高资料的分辨率,其提升空间有限;③就横向分辨率而言,考虑偏移孔径的计算方法,结果比较准确;④对于东部地区,从性价比上考虑,覆盖次数150,200已能满足要求,太高的覆盖次数没有从本质上改进资料的质量。 相似文献
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Magnetic structural information obtained from the HiRES airborne survey of the Isle of Wight 总被引：1，自引：0，他引：1
James C. White David Beamish 《Proceedings of the Geologists' Association. Geologists' Association》2011,122(5):781-786
This study summarises the structural information obtained from a modern high resolution magnetic survey over the Isle of Wight corroborated with additional information derived from existing data available over a much wider area. This new, low-altitude, survey offered the opportunity to compare the UK national baseline magnetic data set (GSGB) acquired during the late 1950s and early 1960s with a high resolution airborne geophysical survey (HiRES) data set. The low level modern survey data, covering an unusually small area for an airborne magnetic investigation, has not been systematically de-cultured for non-geological perturbations since the extent of the cultural interference made the task non-viable. However, after spectral filtering of the two data sets, a West to East trending arcuated magnetic basement feature is successfully defined and compared. Depth estimates for this basement feature are proposed and considered alongside previous estimates which placed the causative body at greater depth.Onshore, the low gradient magnetic field, with little significant shallow magnetic structure within a thick succession of sedimentary rocks, is subjected to a range of filtering techniques that permit a preliminary interpretation of lineaments within the succession. This line work is considered in conjunction with the regional fault mapping undertaken as part of a seismic re-interpretation. 相似文献
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以舒兰煤田为例,论证和分析了在狭长地堑复杂地区二维地震资料处理的各个环节上采用的方法、手段和措施,最终得到高信噪比、高分辨率地震资料,提高了地震解释结果精度,从而达到提高煤田地震勘探水平,准确寻找煤炭资源的目的. 相似文献