塔巴庙地区三维地震资料处理方法与效果

3D seismic data processing methods for data from TBM area and their effects

中国石化石油勘探开发研究院南京石油物探研究所,江苏南京210014

Institute of Geophysical Prospecting, SINOPEC Research Institute of Petroleum Exploration and Development, Nanjing 210014, China

塔巴庙地区是鄂尔多斯盆地中的重点勘探地区。针对该区三维地震资料中静校正量变化大, 规则干扰波强, 浅部和深部要兼顾的特点, 除了采用一般的动、静校正, 压制噪声和精确速度分析的手段外, 重点试验了多域迭代折射静校正方法作为本区三维地震资料处理的必须环节。此外, 在从理论上和实际资料中认识浅部不同介质分界面上形成的瑞利型面波———斯通利波特点的基础上, 消除了此类规则干扰, 使浅层反射波得到明显增强, 降低了全剖面的噪音水平。通过一系列的技术手段, 使塔巴庙地区三维地震资料处理取得了较为理想的效果。

TBM area is one of the most important survey areas in Erdos Basin. To copy with strong regular interference waves, rapid variations of statics, and to reach desired qualities for signals from both shallow and deep layers,multi-domain iteration refraction static correction is a key step in 3D seismic data processing workflow. Traditional NMO, static correction, noise suppression, and accurate velocity analysis are also used.Stoneley waves from different shallow interfaces are recognized and removed from the data.Desired data quality has been reached in TBM area.