面向靶区OBC成像评价观测系统  

Target-oriented OBC imaging observation system

作　　者：王子秋 李艳青 李鹏[2] 顾汉明[2] 

机构地区：[1]中海油服物探事业部,天津300451 [2]中国地质大学(武汉)地球物理与空间信息学院,武汉430074

出　　处：《地球物理学进展》2014年第4期1954-1960,共7页Progress in Geophysics

基　　金：国家863项目(2009AA093401)"海陆联合深部地球物理探测关键技术研究";国家重大科技专项课题(2011ZX05025-001)"南海深水区油气勘探地球物理关键技术"联合资助

摘　　要：OBC近年来得到长足的发展,但采集新技术的出现,相应地要求处理技术的开发和研究必须跟进,跟上世界先进技术的进步,才能更好地为油气的勘探工作做出应有的贡献.目前在OBC采集、处理方面还存在如下问题:如何客观评价现有OBC观测系统的优劣,如何评价采集资料的质量,如何评价现有OBC资料处理模块的效果等.为此,本文收集了靶区地震地质资料,建立了从陆坡区到深水区的二维和三维地震地质模型,基于二维和三维波动方程正演模拟技术,模拟给定的OBC观测系统下的P波和P-SV波炮集记录,根据多波资料处理结果评价对应的OBC观测系统的采集资料的效果.结果显示,OBC接收的地震波场特征复杂,地震波类型很多,合成记录的纵横波分离得到的纵波剖面和转换波剖面特征明显.靶区给定的OBC观测系统正演模拟结果表明,给定的观测系统下,复杂断层能得到较好的偏移成像,但复杂基底尤其是凹陷部位,成像效果较差.OBC obtained the considerable development in recent years,but capture the emergence of new technologies accordingly requires the development of processing technologies and research must be followed up,keep up with the world’s most advanced technological advances,in order to better contribute to the work for oil and gas exploration.At present the OBC acquisition,processing problems also exist,as follows：how to objectively evaluate strengths and weaknesses of existing OBC observation system,how to evaluate the quality of the data,how to evaluate existing OBC information processing module,etc.Therefore,this article has collected the target area seismic geological data,established from the slope area to the deep waters two-dimensional and threedimensional seismic geologic model,based on two-and threedimensional wave equation forward modeling techniques,under OBC observations simulated P-wave and P-SV wave records,according to multi-wave data processing results evaluation of effects of OBC records.Results indicate that OBC received seismic wave field characteristics of complex,and many types of seismic waves,the separation of P-wave section and P-SV wave section characteristics significantly.Target given OBC observing system forward modeling results show that,under given observation system,complex fault can be better imaging,but complex base especially depressed areas,the image is poor.

关 键 词：海底电缆 成像 三维正演 观测系统 

分 类 号：P631[天文地球—地质矿产勘探]