【摘要】 张强工区属辽河外围盆地,受地表条件的影响和地下地质构造的限制,资料处理受到了极大地困扰,虽然野外施工采取了很多有针对性的措施,但部分实测资料信噪比仍然较低,对资料处理造成了一定影响。笔者根据实测资料特点,针对叠前时间偏移处理要求,对叠前数据进行净化处理,建立准确的三维速度场,选择合适的偏移参数,经试验得到了一套合理的处理流程。叠前时间偏移结果表明,剖面的断点、断层清楚,绕射波归位准确;与老资料比较,信噪比和分辨率大大地提高,深层成像效果明显改善,较好地反映构造形态和地层结构,满足后续解释和反演的需求。更多还原

【Abstract】 Zhangqiang area,which belongs to Liaohe peripheral basins,is restricted by the influence of the surface conditions and underground geological structure,and hence data-processing has met with great difficulties.Lots of targeted measures have been taken in field acquisition,but part of the original data signal-to-noise ratio remains low,causing a certain impact on data processing.According to the characteristics of the original data for PSTM,the prestack data purification was conducted,and the accurate three-dimensional velocity field and the appropriate parameters were established to obtain a reasonable process flow.PSTM results show that the profile’s breakpoint and fault are clear,and the homing of the diffracted wave was accurate.A comparison with the old data shows that the signal-to-noise ratio,resolution and deep imaging are improved significantly and can better reflect the structural form and stratigraphic architecture and meet the demand of the subsequent interpretation and inversion.更多还原