Marine wide-azimuth high efficient acquisition experiment: modelling and de-blending
-
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。
Abstract: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.
-
Key words:
- wide azimuth /
- high efficient acquisition /
- forward modelling /
- de-blending /
- vector median filter
-
[1] BEASLEY C J, CHAMBERS R E, JIANG Z. A new look at simultaneous sources [C]. 68th Annual International Meeting, SEG, Expanded Abstract, 1998: 133-135.
[2] BERKHOUT A J, BLACQUIERE G, VERSCHUUR D J. From simultaneous shooting to blended acquisition[C]. 78th Annual International Meeting, SEG, Expanded Abstracts, 2008: 2831-2838.
[3] 曲英,李振春. 可控震源混叠地震数据分离与成像[J]. 石油物探,2020,59(5):713-724. doi: 10.3969/j.issn.1000-1441.2020.05.005
[4] 王华忠. 客户定制反射子波的可控震源地震勘探方法[J]. 石油物探,2020,59(5):683-694. doi: 10.3969/j.issn.1000-1441.2020.05.002
[5] 吴志强,闫桂京,童思友,等. 海洋地震采集技术新进展及对我国海洋油气地震勘探的启示[J]. 地球物理学进展,2013,28(6):3056-3065. doi: 10.6038/pg20130629
[6] DUEY R. Let's make some noise[J]. E & P:A Hart Energy Publication,2010(5):83.
[7] 李士涛,张笑,于宁,等. 海上独立同步震源采集技术应用及进展[J]. 工程地球物理学报,2022,18(4):301-309.
[8] 李培明,宋家文,柳兴刚,等. 海上高效混叠采集参数优化设计[J]. 石油地球物理勘探,2020,55(4):707-715. doi: 10.13810/j.cnki.issn.1000-7210.2020.04.001
[9] RAMESH N,CHRISTINE E,JERRY R,et al. Efficient seismic forward modelling using simultaneous random sources and sparsity[J]. Geophysics,2010,75:15-27.
[10] 宋家文,李培明,王文闯,等. 基于稀疏反演的高效混采数据分离方法[J]. 石油地球物理勘探,2019,54(2):268-273.
[11] 魏亚杰,张盼,许卓. 基于稀疏约束反演的三维混采数据分离[J]. 地球物理学报,2019,62(10):4000-4009. doi: 10.6038/cjg2019M0501
[12] LYNN W,DOYLE M,LARNER K,et al. Experimental investigation of interference from other seismic crews[J]. Geophysics,1987,52:1501-1524. doi: 10.1190/1.1442268
[13] 童思友,王凯,尹文笋,等. 基于卷积神经网络的海洋地震勘探拖缆混采数据分离[J]. 中国海洋大学学报,2021,51(5):81-87.
[14] 徐雷良,邸志新,石太昆,等. 井炮同时震源混叠数据分离技术[J]. 石油物探,2023,62(2):281-296. doi: 10.3969/j.issn.1000-1441.2023.02.009
[15] HUO S, LUO Y, KELAMIS P. Simultaneous source separation via multi-directional vector median filter [C]. 79th International Meeting, SEG, Expanded Abstracts, 2009: 31-35.
[16] 李丽君. 改进的波场外推海底多次波压制方法[J]. 海洋地质前沿,2011,27(4):61-64. doi: 10.16028/j.1009-2722.2011.04.011