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Comparative Analysis and Study of Static Correction Method

Author: LiDa
Tutor: LiuGuoHui
School: Shijiazhuang University of Economics
Course: Mineral prospecting and exploration
Keywords: static comparative analysis Differential Evolution
CLC: P631.4
Type: Master's thesis
Year: 2013
Downloads: 14
Quote: 0
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Abstract


With the rapid development of the national economy, China’s demand for mineral resources such as coal, petroleum and metal is also growing, and geophysical methods and technical level of finding these resources is improving gradually. Seismic exploration plays an irreplaceable role of finding these resources particularly coal and oil, and its working field is also gradually expanding from the Plains to the highly difficult areas such as plateau, desert, and mountains. Original assumed seismic exploration condition of flat near-surface, simple geological structure and easily implemented are a thing of the past. Static correction problem is, of course, become the primary problem of seismic exploration of the highly difficult area, and it is a critical foundational work which runs through the data acquisition, processing and interpretation. Traditional static correction method, such as elevation static and refraction static, mainly resolve the problem of a dimension model which conditions is near surface relative flat, refraction interface relative gentle and clear, and transverse speed nearly homogeneous, but those methods are disable to meet the need of seismic information processing of above complex near surface speed structure area. Tomographic static correction technology by proposed and developed in recent years has good effect and development potential. Tomographic static technique adopts numerical calculation of static methods, and is based on forward modeling and inversion theory. It has the advantages of unlimited aerographical condition, unconstrained surface consistent, and merely need to provide first-time. Those advantages make it obtain widely application in the seismic processing course of highly difficult area. However, due to the diversity of direct and inversion algorithm, there is many methods of static technology and corresponding processing software, which caused frustration to user. Therefore, according to the system analysis comparison of currently existing various static processing software from algorithm to performance, clarifying these superior and inferior and proposing new processing scheme based on existent problem become an important topics concerned.Based on the above issues, this paper seeks to proceed seismic data processing of the same area through a variety of different static correction software, and systematical compare treatment effect. This article carried out seismic typical information comparison analysis of mountain、plain and loess plateau areas, and made following results:①Not only did this article firstly concluded these software’s applied conditions, advantages and disadvantages, and did it resolved the static problem of complex area through integrated applying these software, but also found a optimizing various software combination mode to enhance static accuracy available different terrain.②Comparative and analysis the advantages and disadvantages processing on static correction with inversion algorithm of existing softwares, and proposed a new nonlinear algorithm-Differential Evolution.

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