逆掩推覆构造的地震波照明与观测系统优化

英文篇名：Seismic wave illumination for overthrust nappe structures and optimal seismic survey design.
中文刊名：石油物探
英文刊名：Geophysical Prospecting for Petroleum
作者：董良国 ; 吴晓丰 ; 唐海忠 ; 陈生昌 ; 杨锴 ; 刘守伟
英文作者：Dong Liangguo Wu Xiaofeng Tang Haizhong Chen Shengchang Yang Kail Liu Shouwei ; Tongji University ; Shanghai 200092 ; China
中文关键词：逆掩推覆构造 ; 地震波照明 ; 观测系统 ; 共反射点
英文关键词：overthrust nappe structure ; seismic illumination ; seismic design ; CRP
出版日期：2006-01-25
机构：同济大学,同济大学,中国石油天然气股份有限公司玉门油田分公司,浙江大学,同济大学,同济大学上海200092,上海200092,甘肃玉门735200,浙江杭州200092,上海200092,上海200092
年：2006
期：01
出版单位：石油物探

摘要

在中国的西部和西南部地区,地表条件复杂,逆掩推覆构造广泛分布。在这些地区进行野外地震资料采集,观测系统设计应该基于 CRP 点而不是 CMP 点。为此,对基于 CRP 点的观测系统设计方法进行了探讨。根据波动方程地震波照明结果,利用照明统计、双程波照明或单程波照明方法,确定针对某勘探目的层的地面最优炮点分布范围；利用射线追踪和波动方程模拟,分析特定目的层各 CRP 点的覆盖次数以及照射能量的分布情况；综合地下各目的层不同炮检距地震道对各 CRP 点的覆盖次数和能量贡献分布曲线,确定这些目的层的最优检波器排列方式和排列长度。以玉门油田 JX01逆掩推覆构造模型为例,对面向目标的地震波照明和观测系统优化设计方法进行了讨论,结果表明,利用该方法可以对勘探目标更好地进行成像。
Overthrust nappe structures spread widely in western and southwestern area of China.It should be performed based on CRPs rather than CMPs in this area.By wave e- quation illumination,the optimal source positions are de- termined through illumination statistical method,two-way equation modeling method or one-way equation modeling method.The combination of ray tracing and seismic wave equation simulation is used to calculate the folds and energy distribution for different offsets along the CRPs of a certain surface.From these distribution curves,the optimal re- ceiver array pattern and receiver array length is deter- mined.Using this target-oriented illumination analysis and design,the objective surface is imaged better.

引文

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