辛秀艳^1,,
董凤树^1,,,
符力耘²,
全海燕¹,
罗敏学¹,
胡斌¹,
岳悦¹
1. 中国石油集团东方地球物理勘探有限责任公司, 河北涿州 072751
2. 中国科学院地质与地球物理研究所, 北京 100029

基金项目: 国家科技重大专项大型油气田及煤层气开发（2016ZX05024-007）资助


详细信息

作者简介: 辛秀艳, 女, 1982年生, 硕士, 2009毕业于中国石油大学(北京), 高级工程师, 主要从事地震勘探观测系统研究.E-mail:xinxiuyan@cnpc.com.cn

通讯作者: 董凤树, 男, 1967年生, 博士, 2016年毕业于中国科学院大学(中国科学院地质与地球物理研究所), 高级工程师, 现任东方地球物理公司高级技术专家, 从事地震波勘探研究.E-mail:dongfengshu@cnpc.com.cn

中图分类号: P631

收稿日期:2017-11-08
修回日期:2018-06-06
上线日期:2019-05-05

Multi-trace geometry repeatability based on X-mode relationship between image and geometry repeatability of single-traces

XIN XiuYan^1,,
DONG FengShu^1,,,
FU LiYun²,
QUAN HaiYan¹,
LUO MinXue¹,
HU Bin¹,
YUE Yue¹
1. BGP Inc., China National Petroleum Corporation, Zhuozhou Hebei 072751, China
2. Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China


More Information

Corresponding author: DONG FengShu,E-mail:dongfengshu@cnpc.com.cn

MSC: P631

--> Received Date: 08 November 2017
Revised Date: 06 June 2018
Available Online: 05 May 2019


摘要
摘要:时移地震中新提出的多道观测系统重复性，逐一应用于面元，可以给出每个面元单一的观测系统重复性，形成对应叠后成像的地震道重复性的面分布，对于评估时移地震重复性具有重要意义.前人研究抽象了多道间观测系统重复性与单道间观测系统重复性的关系，给出了多道观测系统重复性的衡量方法及其理论依据.其理论中依赖了地震数据重复性与单道观测系统重复性的线性关系模型，而这一关系在单道观测系统重复性的有限范围内较为准确.针对这一问题，本文提出了X模式拟合的关系模型，与全范围的单道地震数据重复性随观测系统重复性的变化趋势更好地吻合，并采用对大单道观测系统重复性的向X节点的收缩，使原多道观测系统重复性的相应关系在整个数据范围内基本成立.基于实际数据的研究表现了该方法的数据分析结果的新特性和应用价值.
关键词: 时移地震/
4D四维地震/
重复性/
X模式拟合多道观测系统重复性

Abstract:The multi-trace geometry repeatability in the time-lapse seismic method was proposed recently. When it is applied to every bin successively, single-value repeatability of each bin is given, forming two-dimensional distribution of repeatability corresponding to stacked image traces. This is of significance on the evaluation of geometry repeatability for time-lapse seismic acquisition, processing and interpretation, in which the multi-trace repeatability should be addressed due to multi-fold of coverage. Previous research focused on the relationship between repeatability of a multi-trace set and its single-traces, and put forward its measurement of repeatability and theoretical basis. In this theory, the repeatability for multi-trace geometry relies on linear relationship between seismic image repeatability and geometry repeatability of single-traces, which is relatively precise only when single-trace repeatability is confined to limited range beginning with zero. In order to resolve this problem, we establish X-mode fitting for relationship between single-trace seismic image repeatability and single-trace geometry repeatability and put forward the collapse of single-trace geometry repeatability bigger than the X-node value so that the multi-trace geometry repeatability measurement reached by previous research is logically valid within full range of single-trace geometry repeatability. In this X-mode fitting, there are two straight lines with linear fitting:one is of zero intercept and the other is horizontal. X node is the point of intersection (D_x, d_x) of two fitted lines. The final fitting function is composed of fitted linear function with zero intercept (0 ≤ d<d_x) and constant (D=D_x) function (d > d_x). The study on real data shows some new features revealed by the analysis method and shows application value. The combination of extrapolation point, X node and its difference constructs a functional structure of the data via the comprehensive measurement method. This research is based on the essence of the previous research and an important development to it. The method we propose could be a tool for repeatability evaluation and can make time-lapse seismic data more useful.
Key words:Time-lapse seismic/
4D seismic/
Repeatability/
Multi-trace repeatability of X-mode fitting



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