非零偏时延VSP资料处理关键技术

doi:10.11720/wtyht.2024.1161

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摘要

非零偏时延VSP资料含有丰富的井旁波场信息,利用VSP反射信息和地震属性,能有效监测井旁注入流体运移情况,具有广阔的应用前景。受观测方式影响,时延非零偏VSP资料叠加次数有限,对两期VSP资料处理要求更加严格。因此,本文在常规非零偏VSP处理技术流程中引入两期资料的可重复性分析和一致性处理方法技术,建立了时延非零偏VSP资料处理技术流程,并针对时延资料的炮内一致性处理和两期资料间一致性处理进行了方法分析研究和试验。从A井实例应用表明,本文提出的非零偏时延VSP资料处理流程和关键技术具有较高可操作性和实用性,具有推广价值。

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	张洁
	程磊磊
	曾昭翰
	陈林

关键词 ：非零偏时延VSP, 资料处理, 一致性处理, 属性分析

Abstract：

Since non-zero-offset time-lapse vertical seismic profiling (VSP) data contain abundant near-well wave field information,the VSP reflection information and seismic attributes can be applied to effectively monitor the migration of injected fluids near wells,boasting a broad application prospect.Due to the limitation of observation methods,non-zero-offset time-lapse VSP data exhibit limited superposition times,thus demanding more stringent processing for two-phase VSP data.By introducing the repeatability analysis and consistency processing method of two-phase data into the conventional processing technology for non-zero-offset VSP data,this study developed a processing technology flow for non-zero offset time-lapse VSP data.Moreover,this study conducted analysis and tests of the methods for processing the intra-shot consistency of time-lapse data and the consistency of two-phase data.As verified by the application in well A,the processing flow and key technology for non-zero-offset time-lapse VSP data proposed in this study enjoy high operability and practicability and,thus,have the potential for wide applications.

Key words： non-zero-offset time-lapse VSP data processing consistency processing attribute analysis

收稿日期: 2023-04-23 修回日期: 2024-02-20 出版日期: 2024-04-20

ZTFLH:

P631.4

基金资助:中石化科技部项目“面向超深层目标的VSP处理关键技术研究”(P22149)

作者简介: 张洁(1987-),女,2012年毕业于中国石油大学(北京),主要从事VSP资料处理工作。Email:355907985@qq.com

引用本文:

张洁, 程磊磊, 曾昭翰, 陈林. 非零偏时延VSP资料处理关键技术[J]. 物探与化探, 2024, 48(2): 470-478.
ZHANG Jie, CHENG Lei-Lei, ZENG Zhao-Han, CHEN Lin. Key technologies of non-zero offset time-delay VSP data processing. Geophysical and Geochemical Exploration, 2024, 48(2): 470-478.

链接本文:

https://www.wutanyuhuatan.com/CN/10.11720/wtyht.2024.1161 或 https://www.wutanyuhuatan.com/CN/Y2024/V48/I2/470

Fig.1 VSP地震采集示意

Fig.2 三分量检波器采集示意

Fig.3 非零偏时延VSP资料处理流程

Fig.4 震源子波不一致单炮记录

Fig.5 以610~840 m为标准道进行一致性处理

Fig.6 以850~1 080 m为标准道进行一致性处理

Fig.7 Ⅰ期VSP径向分量

Fig.8 Ⅱ期VSP径向分量

Fig.9 一致性处理后的Ⅱ期径向分量

Fig.10 Ⅰ期VSPCDP叠加成像

Fig.11 一致性处理后的Ⅱ期VSPCDP叠加成像

Table 1 基本地质属性及其地质意义

Fig.12 Ⅰ期、Ⅱ期剖面的差值剖面

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