辽河外围盆地张强地区连片叠前时间偏移处理  

THE PIECES-JOINTED PSTM PROCESSING OF LIAOHE PERIPHERAL BASINS IN ZHANGQIANG AREA

作　　者：张伟[1] 何烈刚[1] 王世博[1] 顾剑华[1] 靳旭明[1] 

机构地区：[1]中国石油天然气股份有限公司东方地球物理公司辽河物探处方法研究所,辽宁盘锦124010

出　　处：《物探与化探》2013年第2期338-343,共6页Geophysical and Geochemical Exploration

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。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.

关 键 词：外围盆地 叠前时间偏移 地震资料连片处理 

分 类 号：P631.4[天文地球—地质矿产勘探]