摘要
巴布亚褶皱带是巴布亚盆地的主要油气聚集带,已累计发现40亿桶油当量,但其勘探程度依旧很低.该构造带地表大部分区域为灰岩所覆盖,地形起伏剧烈,地下构造复杂,逆掩推覆构造广泛发育,地震资料采集处理效果很差.为此,在构建逼近巴布亚褶皱带实际复杂地表复杂构造模型的基础上,进行基于波动方程的波场地震正演模拟和地震照明模拟,分析褶皱带复杂地震资料采集和处理的影响因素.结果表明,波场正演模拟方法能够很好地适应复杂地表和复杂构造模型,模拟结果与实际地震资料具有很好的一致性,地面不同位置激发得到的单炮记录和地震照明分布具有很大的差异,探讨了影响复杂构造成像的主要因素.针对工区实际地下目标,提出了地震采集观测系统优化设计和后续处理建议,为复杂地表复杂构造区地震资料采集处理提供了借鉴和参考依据.
The exploration of Papua Fold Belt has made a great success in PNG.Up to now,4billion BOE oil and gas has been discovered,but prospectingis still very low.Most of the surface is covered with limestone and complex structure underground.Overthrust nappe structures spread widely in PNG folded zone.Theresluts of seismic acquisition and processing is poor.Therefore,in constructing Papua fold belt of the conplexmodel,based on wave equation of seismic wave field forward modeling and wave equation illumination,analysing of effects of complex seismic data acquisiton and processing fold belt.The results showed that the wave field forward modeling method can well adapt to the complex structure and complex surface model,the simulation results with the actual seismic data has the very good consistency,different location of the ground excetation get shot records and seismic illumination distribution have very big difference,probes into the main factors influencing the complex structure imaging.Itputs forward the seismic acquisition system optimization design and subsequent processing suggestions,complicated structure area seismic data for complex surface provides reference basis for collection and processing.
出处
《地球物理学进展》
CSCD
北大核心
2015年第5期2239-2245,共7页
Progress in Geophysics
基金
国家重大专项课题"亚太地区油气资源评价及未来战略发展方向"(2011ZX05028-006)资助
关键词
巴布亚褶皱带
逆掩推覆构造
正演模拟
地震照明
Papua fold belt
overthrust structure
seismic forward nodeling
seismic illumination
