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Study on the genesis of karstic collapse column and characteristics of high resolution seismic data in one coal field 被引量:9
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作者 张绍红 林昌荣 《Journal of Coal Science & Engineering(China)》 2008年第4期648-650,共3页
On the standpoint of the disaster prevention from water inrush,discussed the genesis and geologic condition of karstic collapse column in one coal field,analyzed the geophysical characteristics of karstic collapse col... On the standpoint of the disaster prevention from water inrush,discussed the genesis and geologic condition of karstic collapse column in one coal field,analyzed the geophysical characteristics of karstic collapse column by using high resolution 3D seismic data.It shows the effective result of the technology of high resolution 3D seismic pros- pecting in the exploration of the karstic collapse column,and presents some prediction methods and prevention measures. 展开更多
关键词 karst collapse column high resolution seismic water inrush disaster prevention structure property
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High-Resolution Seismic Reflection Profiling of the Fenhe Fault in Taiyuan City
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作者 You Huichuan, He Zhengqin, Ding Zhifeng, Wu Jianping and Wu QingjuInstitute of Geophysics, China Seismological Bureau, Beijing 100081, China 《Earthquake Research in China》 2003年第1期73-84,共12页
In this paper, we demonstrate the high resolution seismic reflection data for a depth range of several hundred meters across the Fenhe fault in Taiyuan city, China. In combination with the relevant borehole logs, thes... In this paper, we demonstrate the high resolution seismic reflection data for a depth range of several hundred meters across the Fenhe fault in Taiyuan city, China. In combination with the relevant borehole logs, these data provide useful constraints on the accurate position, geometry and deformation rate of the fault, as well as the kinematics of recent fault motion. The high resolution seismic reflection profiling revealed that the western branch of the Fenhe fault is a high angle, eastward dipping, oblique normal fault, and cutting up to the lower part of the Quaternary system. It was revealed that the top breaking point of this fault is at a depth of ~70m below the ground surface. A borehole log across the Fenhe fault permitted us to infer that there are two high angle, oppositely dipping, oblique normal faults. The eastem branch lies beneath the eastern embankment of the Fenhe river, dipping to the west and cutting into the Holocene late Pleistocene strata with a maximum vertical offset of ~8m. Another borehole log across the northern segment of the Fenhe fault indicates that the western branch of this fault has cut into the Holocene late Pleistocene strata with a maximum vertical offset of ~6m. The above mentioned data provide a minimum average Pleistocene Holocene vertical slip rate of 0 06~0 08mm/a and a maximum average large earthquake recurrence interval of 5 0~6 7ka for the Fenhe fault. 展开更多
关键词 Taiyuan city Fenhe fault high resolution seismic reflection profiling
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Principle and application of high density spatial sampling in seismic migration
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作者 李子顺 《Applied Geophysics》 SCIE CSCD 2012年第3期286-292,360,共8页
To avoid spatial aliasing problems in broad band high resolution seismic sections, I present a high density migration processing solution. I first analyze the spatial aliasing definition for stack and migration seismi... To avoid spatial aliasing problems in broad band high resolution seismic sections, I present a high density migration processing solution. I first analyze the spatial aliasing definition for stack and migration seismic sections and point out the differences between the two. We recognize that migration sections more often show spatial aliasing than stacked sections. Second, from wave propagation theory, I know that migration output is a new spatial sampling process and seismic prestack time migration can provide the high density sampling to prevent spatial aliasing on high resolution migration sections. Using a 2D seismic forward modeling analysis, I have found that seismic spatial aliasing noise can be eliminated by high density spatial sampling in prestack migration. In a 3D seismic data study for Daqing Oilfield in the Songliao Basin, I have also found that seismic sections obtained by high-density spatial sampling (10 ×10 m) in prestack migration have less spatial aliasing noise than those obtained by conventional low density spatial sampling (20 × 40 m) in prestack migration. 展开更多
关键词 high resolution seismic spatial aliasing high density migration Songliao Basin
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