摘要
远探测声反射成像测井相比地震勘探有更高的分辨率,相比常规声波测井有更深的横向探测深度,可以对井外裂缝、孔洞及其他地质界面进行探测,进而对复杂、隐蔽性油气藏进行评价。有效的偏移成像算法是声反射成像测井资料应用的关键。提出远探测声波井下裂步傅里叶叠前深度偏移方法进行偏移成像处理。该方法基于地震资料处理方法中的裂步式傅里叶偏移方法,针对声反射测井作了相应的改进,不受倾角限制和频散的影响,同时,可以适应速度场中等程度的垂向变化。通过数值模拟数据以及实际资料的处理验证了该方法的有效性。
As a newly developed well logging technique, remote exploration acoustic reflection imaging logging reveals great advantages for detecting near borehole fractures and vugs because of its high vertical resolution compared with seismic exploration and deep lateral detection depth compared with conventional acoustic logging, so, it can evaluate the complex and hidden reservoir. The effective migration imaging algorithm is the key of acoustic reflection imaging logging data application, proposed is split-step Fourier migration （SSF） in remote exploration acoustic reflection imaging logging to process migration images. Based on the SSF in seismic exploration, the method is improved in acoustic logging, it has no dip angle limitation, is free of frequency dispersion, and is adaptable to moderate fluctuation of the velocity model, which makes it possible for effectively detecting near bore hole geological structures. In this paper, the synthetic model, water tank data as well as the field data have been used to demonstrate the validity and effectiveness of SSF in detecting near borehole structures.
出处
《测井技术》
CAS
CSCD
北大核心
2014年第2期174-178,共5页
Well Logging Technology
关键词
远探测声反射成像测井
裂步傅里叶法
叠前深度偏移
波动方程
频率-波数域
remote exploration acoustic reflection imaging logging
split-step Fourier
migration
wave equation
frequency-wave number domain
