电磁资料在柴达木盆地东部地区石炭系勘探中的应用

摘要

Carboniferous formation in the eastern Qaidam Basin belongs to a new area and new strata and lack of data on well and seismic,so processing and interpretation of electromagnetic data must be valued.New Electromagnetic data in eastern Qaidam Basin was used as the center,constrained with drilling and seismic data,and combined with other exploration data,gravity data to do comprehensive research and joint interpretation in this area.Firstly the electromagnetic data was pre-processing and inversed,mainly using the one-dimensional Bostick inversion,one-dimensional continuous medium inversion,two-dimensional conjugate gradient inversion,2D continuous medium inversion and optimization of electric-layered inversion technique.Then the electromagnetic data and other data was comprehensively interpreted and researched,thus get some comprehensive research results such as Carboniferous thickness map,Carboniferous buried-depth map,so as to effectively predict the oil traps in eastern Qaidam Basin.At last,some conclusions and recommendations were advised in the Carboniferous exploration of Eastern Qaidam Basin.%以柴达木盆地东部新采集的电磁资料为中心,同时以钻井、地震资料为约束,结合其他勘探资料、重力资料进行柴东地区石炭系综合研究、联合解释.研究过程中,首先对电磁资料进行了前期的预处理和反演,主要采用了一维Bostick反演、一维连续介质反演、二维共轭梯度反演、二维连续介质反演及最优化电性分层等反演技术;而后通过对电磁资料进行联合解释和综合研究,得出了柴达木盆地东部石炭系厚度图、石炭系埋深图等柴东地区综合研究成果;最后利用上述研究成果预测了柴达木盆地东部石炭系含油气有利区带,并且进一步针对柴达木盆地东部石炭系勘探提出了有意义的结论和建议.