摘要
针对复杂构造地区VSP资料成像处理的难题,对VSP走廊叠加和VSP-CDP转换成像方法进行改进,提出了新的倾角扫描走廊叠加、自动追踪走廊叠加成像方法,以及模型边界约束的VSP-CDP转换成像方法。通过滨里海地区一口井的实际VSP资料,证实了走廊叠加和零井源距成像新方法的有效性与实用性。研究结果表明:1新的倾角扫描走廊叠加方法和自动追踪走廊叠加方法均可以实现复杂构造地区倾斜同相轴有效叠加的目的,较好地解决倾斜地层的VSP标定问题,其中自动追踪走廊叠加方法能更好地保护原始波组特征,减小降频影响,叠加结果更可靠;2模型边界约束的VSPCDP转换成像方法可以更好地揭示井旁构造细节,有利于精细构造解释或井-地联合地震解释等。
In order to solve the imaging problem of VSP acquisition with complex structures,we improved the VSP corridor stacking and VSP-CDP transform,and proposed dip-scanning corridor stacking method,auto-tracing corridor stacking imaging method and model boundary constraint VSP-CDP imaging method imaging.These methods are applied to the field VSP data in Pre-Caspian Basin.The result shows that these methods are valid for the VSP processing：1the two corridor stacking methods are available for declining alignments of complex structures to well solve the VSP calibration problem of declining formations;2the corridor stacking of automatic tracing method is more reliable because which can better protect original characteristics of wave groups and reduce the impact of frequency decrease;3 the model boundary constraint VSP-CDP transform imaging method can be used to study the detail of wellside geologic structures and beneficial for fine structure interpretation or borehole-ground joint seismic interpretation,etc.
出处
《石油物探》
EI
CSCD
北大核心
2015年第3期309-316,共8页
Geophysical Prospecting For Petroleum
