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Inclined hole seismic reflection imaging technology research methods

Author: LiaoMaoHui
Tutor: SunYuan
School: Chang'an University
Course: Earth Exploration and Information Technology
Keywords: Hole seismic Total lateral point gathers Reflected wave velocity analysis Stacking velocity Integration of CLP Road as
CLC: P631.4
Type: Master's thesis
Year: 2010
Downloads: 72
Quote: 2
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Abstract


Well seismic borehole seismology is an important part, it is the source and the detector are placed in observation wells for the new seismic geophysical methods, because of surface low velocity to avoid high-frequency seismic signal absorption, so you can get high-resolution seismic information, capable of geological structure between wells, reservoirs and other geological targets fine description. Will provide a wealth of well seismic ultra-high frequency longitudinal and shear wave data and other relevant information for a comprehensive study can solve thin interbedded reservoir connectivity, fluid distribution, gas injection, fracturing effects and other complex geological reservoirs and engineering problems. Well seismic observation form and surface seismic, VSP seismic observation forms are very different, because the special observation forms between wells caused a hole seismic wave field of complexity. Thus hole seismic wavefield difficult to identify, the wave field separation more difficult, pending the development of new seismic imaging techniques. Hole seismic reflection imaging is well seismic data processing technology is the most critical step, is one of the geological model inversion is an effective means. In this paper hole seismic reflection imaging methods and techniques for a more in-depth discussion and research, analysis of the advantages and disadvantages of various imaging methods, choose a simple and practical method for cost-effective imaging lateral point total (CLP) pumping channel integration as approach. The method is ground in a horizontal media raised under the premise, for less complex stratum structure, areas of lateral velocity changes little higher image quality, and achieved good results. The imaging method is the first step: the speed scanning velocity spectra produced using the superposition principle, extraction stacking velocity; second step is: Based on the theory of hyperbolic reflection wave velocity superposition of the original shot gathers or common receiving point channel Set vertical moveout correction, the reflected waves are corrected to the horizontal axis position; third step is: calculated for each spatial position of the reflection point, the coordinate conversion, the reflection point return to the real position of horizontal point gather is formed; Finally, within the common point gathers transverse horizontal stack imaging. According to papers of lateral point (CLP) pumping channel integration steps like using VisualC 6.0 completed the calculation method programming with QT3.3.2 to achieve the program's modular and visualization. In this paper, a total transverse pumping channel integration points as well seismic methods theoretical model and the actual data were imaging analysis, and achieved good results. Therefore, the reflection imaging method has some practical and effective.

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CLC: > Astronomy,Earth Sciences > Geology > Geology, mineral prospecting and exploration > Geophysical exploration > Seismic exploration
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