有限差分波动方程基准面校正方法及其在丘陵地区的应用

英文篇名：Finite differential wave equation datum correction technique and its application in hilly area
中文刊名：石油物探
英文刊名：Geophysical Prospecting for Petroleum
作者：赵传雪 ; 王丽 ; 吴靖 ; 江伟
英文作者：Zhao Chuanxue ; Exploration Technology Institute ; Jiangsu Oilfield Branch Company ; SINOPEC ; Nanjing 210046 ; China Wang Li ; Wu Jing ; Jiang Wei.
中文关键词：丘陵地区 ; 复杂近地表结构 ; 静校正问题 ; 有限差分波动方程基准面校正 ; 噪声压制
英文关键词：hilly area ; complex near-surface structure ; statics problem ; finite differential wave equation datum correction ; noise suppression
出版日期：2009-09-25
机构：中国石油化工股份有限公司江苏油田分公司物探技术研究院;
年：2009
期：05
出版单位：石油物探

摘要

由于现有静校正方法的应用存在一些局限,因此不能很好地解决复杂近地表结构地区的静校正问题。为此,研究了基于有限差分算子的波动方程基准面校正技术。简要介绍了该技术的基本原理,给出了实现该方法的具体流程,并将该方法应用于雷琼地区徐闻区块丘陵地区的地震数据处理。单炮记录的处理结果表明,该方法不仅可以改善反射波同相轴的连续性,还可以较好地压制噪声。对经过野外静校正、初至层析静校正和波动方程基准面校正处理的叠加剖面进行了对比分析,结果表明,波动方程基准面校正能够较好地消除复杂近地表结构的影响,提供更高精度的成像剖面。
For the statics problem in complex near-surface structure area, on account of the restriction of current statics method,the statics problem in such area cannot be well solved.Aiming at the problem, wave equation datum correction technique based on finite differential operator was studied.The principles of the method were briefly described,and the processing flow was presented.The method was applied to the actual seismic data processing for Xuwen hilly area, Leiqiong area.The processing results on single-shot record show that the method can not only improve the continuity of reflection events, but also better suppress the noise.By contrasting the stack profiles after field statics,first break tomographic statics and wave equation datum correction,the results show that wave equation datum correction can correctly remove the influence of complex near-surface structure and provide imaging profile with higher accuracy.

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