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L盆地是南海深水油气勘探远景区,受复杂地质条件与崎岖海底影响,L盆地速度横向变化剧烈,地震资料多次波发育,信噪比与分辨率均较低,因此叠后资料成像质量差,波组特征极不明显,难以落实盆地结构与沉积特征,严重制约了该区勘探研究工作的深入.如何对各种类型的多次波进行有效压制,并提高资料信噪比是本次重处理的重点和难点.本文针对深水崎岖海底地震资料的特点,在广泛试验的基础上,主要采取了组合多次波衰减技术、多域噪声压制技术,提高资料的信噪比与分辨率,使资料品质得到显著改善,为L盆地的区域研究与目标评价工作提供了可靠的资料保障.
The L Basin is a deep-sea oil and gas exploration prospect in the South China Sea. Due to the complex geological conditions and the rugged seafloor, the L basin has a drastic transverse velocity change. The seismic data have multiple waves and the signal-to-noise ratio and resolution are low. Therefore, the post- , The characteristics of the wave group are extremely obscure and it is difficult to implement the structural and sedimentary characteristics of the basin and seriously restrict the exploration and research work in this area. How to effectively suppress various types of multiple waves and improve the signal to noise ratio The key and difficult to deal with.According to the characteristics of deep-seated seafloor seismic data, based on a wide range of experiments, this paper mainly adopts combination multiple attenuation and multi-domain noise suppression to improve the signal to noise ratio and resolution of data The quality of data has been significantly improved, providing a reliable data guarantee for the regional basin research and target evaluation.