渤海多工区交叠区域潜山成像精细处理技术研究与应用

Research and Application of Fine Imaging Processing Technology of Buried Hill in the Overlapping Area of Multiple Working Areas in Bohai Sea

目前,渤海工区已实现三维采集全覆盖,但不同工区施工时间跨度较大,存在多种采集方式。不同工区在采集方向、偏移距范围、振幅大小、频率特征、信噪比等方面存在较大差异,给多工区交叠区域潜山成像带来艰巨挑战。针对渤海多工区交叠区域老资料重处理问题,本文从精细关键处理技术、精细拼接技术、高精度三维叠前深度偏移3个方向着手和重点攻关,以提高潜山构造区成像质量。通过实际资料验证,本文处理方法对渤海多工区交叠区域老资料潜山成像效果提升显著,较好地验证了本文方法的有效性。

At present,the Bohai Sea working area has achieved full coverage of 3D acquisition,but the construction time span of different working areas is large.There are a variety of acquisition methods,so different working areas have great differences in acquisition direction,offset range,amplitude difference,frequency characteristics,signal-to-noise ratio and other aspects,which brings arduous challenges to buried hill imaging in the overlapping area of multi-working areas.In order to improve the imaging quality of buried hill structural area,this paper focuses on three aspects:fine key processing technology,fine splicing technology and high precision 3D prestack depth migration.Through the actual data verification,the imaging effect of the proposed method on buried hill of old data in the overlapping area of multiple working areas in Bohai Sea is significantly improved,which better verifies the effectiveness of the proposed method.