摘要
震源交替扫描广泛应用于地震作业来提高生产效率。二维陆地勘探项目采用震源乒乓交替作业模式,不但能提高生产效率,而且两套震源行进产生的噪音,能相互压制降低对资料品质的影响。本文介绍了甲方在技术标中要求采用单组6台震源双线面积组合施工。在清双线前提下,用乒乓交替作业模式作业方案一方面能够提高二维施工效率;另一方面设计两组震源处在相对近偏移距内行进,分析震源间行进噪音对资料品质的影响;增加震源扫描长度,使组内台次由6台采集减少为4台采集,降低自相关合成子波主波峰宽度变"胖"程度,从而提高资料分辨率。通过采集试验分析,验证了乒乓交替作业模式在二维震源采集的优势。
The method of flip-flop sweeping has been widely applied for seismic survey to improve the production efficiency.Pingpang flip-flop sweeping is introduced to the project of 2D vibroseis seismic survey,it can not only improve the production efficiency but also suppress noise caused by each other group of vibrators to reduce the noise impact on data.This article introduces the requirement of using a single group with 6 vibrators and square patter by client.On the condition of clearing dual lines for deploying vibrator source,the method of Pingpang flip-flop sweep ing improves the efficiency of 2D seismic operation.On the other hand,the design of two groups of vibrators moving in near-offset distance is to analyze the noise influence on data.Increasing the sweep length,decreasing the vibrator number from 6 to 4 and depressing the main peak breadth of synthetic autocorrelation wavelet to become "fatter"are order to improve seismic resolution.Study on data acquisition and analysis verifies the advantage by applying Pingpang flip-flop sweep for 2D vibroseis seismic survey.
作者
孙军和
李伟平
许宗武
李虎
肖新建
Sun Junhe;Li Weiping;Xu Zongwu;IA Hu;Xiao Xinjian
出处
《物探装备》
2018年第5期313-315,346,共4页
Equipment for Geophysical Prospecting
关键词
面积组合
乒乓交替
噪音
分辨率
二维采集
square pattern
Pingpang flip-flop sweep
noise
resolution
2D survey
作者简介
孙军和,男,1965年出生,高级工程师,东方地球物理公司科技带头人。1988年毕业于河北工业大学机械制造专业,现从事可控震源应用技术的研究工作。
