海上多分量地震资料处理技术研究

THE RESEARCHES ON PROCESSING TECHNIQUES OF OFFSHORE MULTICOMPONENT SEISMIC DATA

我国海上油气勘探长期存在着用纵波地震勘探难以解决的地震模糊带和岩性假亮点等问题.近几年来,中国海洋石油总公司在我国近海相继进行了3次较大规模的二维、三维多分量地震勘探,研制开发了国内第一套商业化海上二维多分量地震资料处理系统OMS,并对南海两次采集的二维多分量地震资料进行了处理,其结果表明:这套自主研发的海上二维多分量地震资料处理技术比较成熟,转换波处理效果很好.此后,在二维多分量地震资料处理系统的基础上,又自主开发了部分三维转换波处理功能,并对渤海采集的部分三维多分量地震资料进行了试验性处理.目前三维多分量地震资料处理所面临的困难和问题仍比较多,三维转换波处理方法也需要进一步发展.为此,提出了下一步多分量地震资料处理技术研究与发展的方向.

For the offshore petroleum exploration in China, it has long existed that the fuzzy zones and lithological false bright spots can't be eliminated by the P_wave seismic exploration. In recent years,three massive multicomponent seismic explorations of 2D and 3D have been conducted by CNOOC in offshore China, and a set of commercial processing system for offshore multicomponent seismic data(OMS) was developed. The two sets of 2D multicomponent seismic data acquired in South China Sea have been successfully processed with this system, indicating its mature processing techniques and good converted wave results. Furthermore, a part of 3D converted?_wave processing module has been added into the system by ourself developing, and a trial processing was made for a part of 3D offshore multicomponent seismic data acquired in Bohai Bay. At present, there are still more difficulties and problems in processing 3D multicomponent seismic data, and the 3D converted?_wave processing methods also need to be further developed. For these reasons, the next research direction of multicomponent seismic data processing techniques are proposed.