准噶尔盆地南缘山前带表层结构调查及静校正

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英文篇名：Near-surface Structure Survey and Static Correction Method of Thrust Belt at the Southern Edge of Zhunger Basin 中文刊名：江汉石油职工大学学报 英文刊名：Journal of Jianghan Petroleum University of Staff and Workers 作者：姚本全 ; 王海航 ; 刘丹东 英文作者：YAO Ben-quan1 ; WANG Hai-hang2 ; LIU Dan-dong1(1.Geophysical Exploration Company of Jianghan Petroleum Administration ; SINOPEC ; Qianjiang Hubei ; 433100 ; China ; 2.Geophysical Exploration Research Institute of Jianghan Oilfield Company ; SINOPEC ; Qianjiang Hubei ; 433100 ; China) 中文关键词：表层结构调查 ; 静校正 ; 层析 ; 模型 英文关键词：Near-surface Structure Survey ; Static Correction ; Tomography ; Model 出版日期：2007-11-20 机构：江汉石油管理局地球物理勘探公司,江汉油田分公司物探研究院,江汉石油管理局地球物理勘探公司 湖北潜江433100,湖北潜江433100,湖北潜江433100 年：2007 期：06 出版单位：江汉石油职工大学学报

摘要

准噶尔盆地南缘米泉地区地处复杂的逆冲断裂带,不仅地表高差变化大、断裂发育、老地层出露,而且表层岩性横向变化大,加上因风化、垮塌、冲积等原因在表层堆积厚度横向变化不等的黄土砾石,致使该区地震资料信噪比低、静校正复杂、地震资料成像困难。为此,从研究表层结构调查与地震成像之间的关系入手,提出了运用层析进行表层结构调查的方法,弥补了常规表层结构调查方法的观测盲区,提高了表层结构模型的精度,并结合层析静校正方法提高了地震成像效果。
Miquan area,which is at the southern edge of Zhunger Basin,is located in a complex thrust belt.In this area,static correction is very complex and signal-to-noise ratio is low because of height difference of terrain,frequent variation of lithology,many faults and outcrop of old layer.What's more,the loess and gravel with different thickness built up on the surface by weathering,collapse and alluviation influence the mapping of the seismic information in this area.Therefore,the authors,beginning with studying the relationship between near-surface structure survey and seismic imaging,present an application of tomography method in near-surface structure survey of thick loess and gravel areas,which resolves the observation difficulties of general field near-surface survey method and increases the accuracy of field near-surface modeling.Also,they probe into further improving seismic imaging through static correction in accordance with the tomographic static correction method.

引文

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