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基于Qt的Walkaway VSP逆时偏移软件开发研究

石油物探

2015年 54卷第No. 4期

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Title

Qt based software development of reverse time migration for walkaway VSP seismic data

单位

(1.东北石油大学地球科学学院,黑龙江大庆163318;2.中国石油化工股份有限公司东北油气分公司,吉林长春130062)

Organization

(1.College of Earth Sciences,Northeast Petroleum University,Daqing 163318,China; 2.Oil & Gas Exploration Department,Northeast Oil & Gas Branch,SINOPEC,Changchun 130062,China)

摘要

VSP观测系统的检波器位于井筒内,地震资料的信噪比高,波场信息丰富,利用基于双程波的叠前逆时偏移方法可实现VSP资料的高精度成像,也为井筒附近复杂介质和目的层流体性质的研究提供基础资料。在Walkaway VSP资料逆时偏移算法研究的基础上,在Linux操作系统下,以Qt环境为开发平台,设计了一套较为完整的VSP资料逆时偏移处理流程,初步开发了Walkaway VSP资料逆时偏移计算软件。该软件具有CPU和GPU两套核心算法模块,可适应不同的硬件系统,理论模型数据测试结果表明,该软件平台具有操作性强、移植性好和成像精度高的特点。

Abstract

The geophones in VSP geometry are located down in the borehole,therefore VSP seismic data has high S/N and with rich wavefield information.Based on two-way acoustic wave raypath,the prestack reverse time migration (RTM) has high precision for imaging,and provides important data for the study of complex subsurface structure near the borehole and fluid properties in targeted formation.According to the algorithm of reverse time migration for walkaway VSP seismic data,the complete RTM processing flow of VSP data was designed and the VSP RTM software was preliminarily developed,which is developed by Qt language as well as in Linux operating system.Two types of core algorithm systems,CPU and GPU can be installed in different hardware.The test of model data demonstrated that the developed software is characterized by easy operating,good transferring and high imaging precision.

关键词：

VSP; 逆时偏移; Qt; 软件界面;

Keywords:

VSP,; reverse time migration,; Qt,; software interface;

基金项目

国家自然科学基金面上项目(41474118)、国家高技术研究发展计划(863计划)项目(2012AA061202)联合资助。

DOI

10.3969/j.issn.1000-1441.2015.04.012