Abstract:Starting from the formula of NMO correction of wide-angle reflection having the correction of truncation errors,the paper analyzed the causes of NMO errors and pointed out existed problems during the process of evaluating the residual errors. On that basis, according to the two objective realities that the 4th-order Taylor truncation equation and 6th-order Taylor truncation equation are situated above and bellow the true travel-time curve of reflections separately and that the two curves having higher similarity closely approaches each other when one curve approaches to the other,using optimum curve that has similar errors when 6th-order equation approaches to the 4th-order equation and is situated bellow the true travel-time of reflections and computing the mean values both for 4th-order equation and 6th-order equation can eliminate the influence of truncation errors existed in application of Taylor truncation equation. The method can accurately approach the travel-time of reflections and avoid the evaluation of residual truncation errors. The paper tested the method by using theoretical models and practical data.
夏洪瑞, 葛川庆. 误差均值法实现广角反射NMO校正[J]. 石油地球物理勘探, 2005, 40(4): 381-385.
Xia Hong-rui, Ge Chuan-qing. NMO correction of wide-angle reflection by mean errors value method. OGP, 2005, 40(4): 381-385.