海上宽方位高效采集试验——模拟与信号分离  被引量:3

Marine wide-azimuth high efficient acquisition experiment:modelling and de-blending

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作  者:张庆淮 王明星 吴安楚 朱立彬 陈吴金 ZHANG Qinghuai;WANG Mingxing;WU Anchu;ZHU Libin;CHEN Wujin(International Department,Sinopec Geophysical Corporation,Beijing 100020,China;College of Marine Geosciences,Ocean University of China,Qingdao 266100,China;Research and Development Center,Sinopec Geophysical Corporation,Nanjing 211000,China)

机构地区:[1]中石化石油工程地球物理公司国际业务发展中心,北京100020 [2]中国海洋大学海洋地球科学学院,青岛266100 [3]中石化石油工程地球物理公司科技研发中心,南京211000

出  处:《海洋地质前沿》2023年第6期93-100,共8页Marine Geology Frontiers

基  金:中石化地球物理公司基础性技术攻关课题“OBC/OBN地震数据波场特征分析与鬼波压制”(SGC202207)。

摘  要:海洋地震勘探中,多震源同时激发的高效采集方法越来越受到油公司的青睐,该采集技术可提高施工效率,极大降低勘探成本,通过增加炮点密度提高地震勘探采集效果。但是,这种采集方式也面临着震源高效激发混合采集带来混叠噪声的挑战。作为实际采集试验的有效替代,采用波动方程模拟海上宽方位采集地震数据,仿真多船4震源高效激发的宽方位高效采集模拟记录,探索提出有效分离高效采集混叠记录的方法和流程。通过对模拟数据的处理,有效分离了高效激发混合采集带来的多震源能量的干涉,为海上高效采集生产推广探明了方向。Marine wide-azimuth high-efficient acquisition using multi-vessel and multi-cable network is increasingly noticed by petroleum companies to reduce costs through higher productivity and to improve seismic data quality through denser source sampling.One major drawback of this method is the crosstalk noise generated by the simultaneous source.It is essential to understand the characteristics of interference from this type of noise and identify proper acquisition techniques and processing workflows to reduce its impact on image quality.First,3D finite difference modelling was performed at a complex subsurface and then data were blended by combining the synthetic shots to simulate a four-boat wide-azimuth marine seismic survey.At last,a series of processing techniques were applied to optimally de-blend the data.These techniques were tested in several different domains and also in a cascaded manner.

关 键 词:宽方位角 高效采集 正演模拟 信号分离 矢量中值滤波 

分 类 号:P736.41[天文地球—海洋地质]

 

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