欧北地区深层三维地震采集技术

辽河盆地由于其特殊的地震地质条件,以往采集的深层地震资料信噪比和分辨率都较低,已经严重制约了油田的进一步勘探和开发.为了彻底摆脱地震资料品质对勘探工作的束缚,努力提高资料的信噪比和分辨率,辽河油田首先选择辽河盆地东部凹陷欧利坨子北为突破口,通过采取最佳岩性激发、有效弱信号保护和变观测系统施工等一系列的技术措施,取得了较好的效果.

DEEP-LAYER THREE-DIMENSIONAL SEISMIC DATA ACQUISITION TECHNIQUE IN OUBEI AREA

The signal-to-noise ratio and resolution ratio of seismic data acquired from the deep layer of Liaohe basin are relatively low due to the peculiar seismic geological conditions, which has greatly restricted further exploration and development of the Liaohe oilfield. In order to break the restriction of seismic data quality for exploration and enhance the signal-to-noise ratio and resolution ratio, research workers of the Liaohe oilfield chose northern Oulituozi in the eastern sag of the Liaohe basin as the study area and employed a series of techniques such as optimum lithologic excitation, useful weak signal protection and variable geometric acquisition to conduct the test. The result is proved to be quite satisfactory.