【摘要】 当在地震勘探野外采集中遇到障碍物时,炮点位置通常会偏离设计位置。线性动校正是检查炮点位置偏离情况的常用方法,但其无法准确判断炮点位置偏离的方向及距离。为此,研究提出了炮点空间位置差异校正技术,该技术首先采用线性动校正分象限叠加方法判断出位置不准的炮点及偏离方向,然后,采用分排列校正时差分析方法确定炮点的偏离量。理论和实践证明,该技术突破了常规线性动校正和叠加线性动校正技术的局限,不但能对炮点的偏离方向做出判断,还能对偏移距离有一个较准确的定量分析结果。更多还原

【Abstract】 When encounter obstacles in data collection of seismic exploration,the shot points usually deviate from the first measurement.Linear normal moveout correction(NMO) is an ordinary method for examining the situation of the shotpoint’s deviation,however,it is impossible to accurately determine the direction and distance of shot position’s deviation.Spatial location of shotpoint difference emendation technique was put forward.It adopts linear NMO quadrant stacking method to discriminate those inaccurate shot position’s deviation direction,then uses arrangement moveout correction analysis method to confirm the deviation values.It has been proved theoretically and practically that the technique breaks through the limits of conventional linear NMO and stacking linear NMO,and has the capability not only to examine the shot’s deviation direction,but also to work out a relatively exact quantitative analysis result of the deviation distance.更多还原