基于渤中A区块气云区目标体的采集参数优化设计

在气云区由于地震波能量被吸收造成地震资料品质极差,受影响地震剖面会出现弱振幅、弱连续性特征和杂乱反射的模糊带,严重影响构造的落实以及进一步的钻探评价。目标采集设计技术是以地质目的为导向,对目标体在地震和地质充分分析的基础上进行论证的综合方法,包括基于地球物理模型的观测系统参数分析设计技术和基于地下模型的正演模拟照明技术。这里以渤海A区块气云区为实例,通过目标体采集优化设计,得到的地震资料信噪比高、波组特征丰富、成像清晰,地震资料品质大幅提升。应用效果分析表明,目标采集技术可以较好地解决复杂气云区的成像问题。

Acquisition parameter optimization design based on the target in BZ-A gas cloud area

Due to seismic wave energy absorbed in the gas cloud area,seismic data quality is extremely poor.This leads to that weak amplitude,weak continuity characteristics and fuzzy chaotic reflection would be shown on the seismic section,which will seriously affect the implementation of the structure and further exploration evaluation.The target acquisition design technology is a comprehensive method based on the geological purpose and the analysis of the seismic and geology.It includes the parameter analysis and design technology based on geophysical model and forward modeling of simulating illumination based on geological model.This paper takes the gas cloud area of BZ-A as an example,the obtained seismic data have high signal-to-noise ratio (SNR),rich wave group feature,clear imaging and great improvement of seismic data through the optimization design of target acquisition.The application results show that the target acquisition technology can solve the problem of imaging in complex gas cloud area.