Abstract：During the seismic acquisition,it is easy to lead to the shotpoint deviation due to rough terrain,staff negligence,and other reasons,which has an adverse impact on the accuracy of normal moveout corrections and stacking data,even causes continuously bad shot records.Based on the property of the nearest-offset trace(shortest first break time and highest energy),we propose a method for fast detection and correction of shotpoint deviation.In order to improve the efficiency and accuracy,only the seismic information of the nearest-offset trace is used.First,the nearest-offset trace is determined by the theory first break time and the real first break time,and the highest-energy trace is found.If they are the same trace,the shotpoint is normal,otherwise,the shotpoint is deviated.Finally the shotpoint deviation is automatically corrected with the calculated deviation.Field applications show that the proposed method can quickly detect shotpoint deviation and automatically correct it,which fully meets the requirement of real-time QC during the high-productivity seismic acquisition.
魏新建, 杨午阳, 王万里, 李冬, 陈德武, 李书平. 基于最小炮检距道快速检测炮点偏移方法[J]. 石油地球物理勘探, 2019, 54(2): 254-260.
WEI Xinjian, YANG Wuyang, WANG Wanli, LI Dong, CHEN Dewu, and LI Shuping. A method of fast detecting shotpoint deviation based on the nearest offset trace. Oil Geophysical Prospecting, 2019, 54(2): 254-260.
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