【摘要】 当地下地质构造复杂、断裂发育,横向速度变化不太剧烈的情况下,三维叠前时间偏移是一种提高偏移成像精度的行之有效的方法。三维叠前时间偏移取得成功除了有一套高保真、高信噪比的叠前数据之外,还须建立一个合理的三维偏移速度场。通过对江苏油田高邮地区实际三维地震资料处理,解决了叠后时间偏移无法查清的复杂断块的成像以及火成岩岩下目标层的成像问题。钻探结果与处理结果相吻合,证实了三维叠前时间偏移技术是解决高邮地区复杂构造成像的一种好方法。更多还原

【Abstract】 In a situation that the underground feature is complex geologic structure,developing fault and gentle variation of lateral velocity,the 3-D prestack time migration is feasible method for improving the precision of migration imaging.The key achieving successful 3-D prestack time migration is to build up the reasonable 3-D migration velocity field besides having a set of hi-fi and high S/N ratio prestack data.The issues that the imaging of complex fault blocks cafft be identified by prestack time migration and targets below igneous rock before can be solved now by the practical 3-D seismic data process data in Gaoyou area of Jiangsu Oilfield.The correlation of drilling results is identical to processed results,proving that the 3-D prestack time migration technique is good method for solving the imaging of complex structure in Gaoyou area.更多还原